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Advanc ed Bus Transfer and Load Shedding Appl ic at ions

w i t h IEC61850

Tony Zhao Lubomir Sevov Craig WesterPowell Electrical Systems Inc GE Digital Energy Multilin

Texas AampM 64th Relay ConferenceApril 13 2011 College Station Texas USA



2

IEC61850

What is GOOSE IEC61850 Substation Communication Standard one technology one standard one world for substation

communications Ethernet network based communications between IEC61850 compatible devices

No serial (RS232 RS485 RS422 etc) communication no RTU Every manufacturer follows the same rules universal self-descriptive tag addressing



3

IEC61850

Why do w e use GOOSE Replace the conventional hard wiring connections between IEDs Reducing wiring complexity Lower installation cost Cost saving by eliminating hard wiring and sometimes even eliminating hardwire components

Communications between IEDs are through Ethernet switches alwaysuse Ethernet TCPIP not serial RTU VLAN and priority need to besetup in the Ethernet switches

HMI Computer

Substation Controller(s) toEMSDCS or SCADAsystem (if needed)



4

IEC61850

GOOSE How fas t

The time needed for trippingopening 52 breaker

with different technologies

Hardwire control relay output

about 12ms

Legacy device communications

about 500ms

GOOSE with IEC61850 capable relays

LAN response time 2-4ms

Relay 1 response time 2 msRelay 2 response time 2 ms

Add input recognition time 0-2ms

Add output operation time 2-4ms

Total 8-14ms

ExampleTripOpen a CB connected to Relay 2from Relay 1 through GOOSE messaging

Station LAN

IEC61850 CapableRelay 1


GOOSE MessageTripOpen command

52Breaker

Output

Ethernet Switch



5

GOOSE m essaging

Indust r ia l app l ic a t ions Bus transfer between incoming sources Trip zone interlocking Under frequencyUnder voltage load shedding Load management in case of source capacity changes Arc flash signal initiate to a fast trip of incoming power source Publish a trip message to all feeder breakers Relay setting group change Breaker reclose initiation Transfer tripping Breaker failure initiate (BFI) to other breakers Fast bus trip scheme helliphellip



6

GOOSE m essaging

Bus t ransfer in a double-ended sub

52M1 52M2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

NC NC

NOFEEDERS

on Bus 2

FEEDERSon Bus 1

Note

1 10-Switch is hardwired or wired to Relay 3 4 and 5 input2 Load shed if needed is hardwired

3 Popular relay based scheme transfer scheme for Relay 3 4 and 5

By SEL 3xSEL-351s Relay communications are through mirror bitBy GE 3xSR750 no relay communication everything is hardwired

4 If not using relays for MTM transfer a PLC is needed to be

programmed do the MTM transfer logic5 For HRG system need hard wire to block transfer or block closing if

GF on both sides

DOUBLE-ENDED MTM SUBSTATION

PROTECTION CONTROL AND METERING

CURRENTLY TYPICAL ARRANGEMENT



7

GOOSE m essagingBus t ransfer in a double-ended sub

New approach

Use 2 relays to do it all

52M1 52M2

3PH

D or Y

SOURCE 1 SOURCE 2

Tx1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



8

Bus t ransfer in a double-ended subComm unic a t ions set upMethod 1 Di rec t f iber c onnec t ion

----Pros

bullSimple

bullNo need for network switchcost saving

bullEasy to add other

relaysIEDs through fiberexpansion for GOOSE toother relaysIEDs from thesame manufacturer

----Cons

bullLess Flexibility

bullFiber ports may take the

place where other modulecan not be added resultingin less IOs

bullDifficult to add other relaysthrough fiber expansion forGOOSE to other relaysIEDsfrom other manufacturers

Link Fiber Direct Connection Example



9

Bus t ransfer in a double-ended subComm unic a t ions set upMethod 2 Add Et hernet sw i t c hes

52M1 52M2

PORT 2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I NE 1

BUS 1 BUS 2

L I NE 2

52T

NC NC

NOFEEDERS

ON BUS 2

FEEDERS

ON BUS 1



10

GOOSE c om m unic at ion-assis t edBus t ransfer in a double-ended subRequirem ent s for t he Relays CT input

bull Three groups of three-phase CT inputs for 87T 5051 (50G51G) for incomers 5051 (50G51G) for tieprotection

bull One group of single-phase CT inputs for 51G at transformer Y secondary for transformer neutralprotection if it is not HRG system

PT inputbull 1 group of three-phase PT on the linebull 1 group of single-phase PT on the bus

bull Main breaker closing 25 is done by line PT and bus PT sync check and voltage permissivebull Bus 1 PT in Relay 1 and Bus 2 PT in Relay 2 are used for tie breaker manual closing (with 10-Switch

function) 25 sync check

Enough available terminals to handle needed digital inputs and digital outputsbull DIs must be hard wired in 52A TOC HRG GF transformer trip signals etcbull DIs may be hard wired in or may be from GOOSE PB or VI (or RB) AutoManual selection 94T 10-

Switch CSC CSO etcbull DOs Close and opentrip commands for each breaker It is better to have trip circuit monitoring

capability also

Protection elementsbull Used for protection 87T 5051 for lines 5051 for bus 51G for TX Y secondary 27 59bull Used for control 27 line to initiate transfer NOT27 line for source healthy (the other line) 25

Comprehensive logic capability Communication capability for substation automation and integration particularly GOOSE

capability to get DI and AI data values from the remote relay Other features nice to have Event waveform force contact input virtual input (remote bit)

and force contact output for easy testing propose



11

IEC61850GOOSE Double-Ended Sub

Use two relays to do everything

bull Meteringbull Protection

bull Control

bull Other

bull These relays are super relays



12

GOOSE Double-Ended SubMeter ing and prot ec t ion

Meteringbull Incoming linebull Voltage magnitude and angle each phasebull Current magnitude and angle each phasebull Frequency

bull Powerbull Power Active Power Pbull Reactive Power Qbull Apparent Power S

bull Power factor

Protectionbull 87T main protection element

bull 5051 (50G51G) for transformer primarybull 5051 (50G51G) for transformer secondarybull 51G for transformer Y sec neutral protectionbull 27 line and bus (also for control purpose)



13

GOOSE Double-Ended SubCont ro l

Manual breaker operations Auto transfer operations

Auto retransfer operations (if needed) 25 function for breaker closing supervision LTC controls if needed Maintenance switch (change settings disable auto

transfer function etc) Arc flash sensor to incoming source breaker Other controls (load shed load management etc)



14

GOOSE Double-Ended SubDig i t a l ou tput a r rangem ent

Relay 1 output to both 52M1 and 52T breaker control circuits Relay 2 output to 52M2 breaker control circuit only Logic for controlling 52M1 and 52T breakers is programmed in Relay

1 but control commands can go there from Relay 2 to Relay 1 through

GOOSE Logic for controlling 52M2 is programmed in Relay 2 butcontrol command can go from Relay 1 to Relay 2 through GOOSE Relay 1 can control 52M2 through GOOSE For example using front

pushbuttons located at Relay 1 to close or open 52M2 breaker Relay 2 can control 52M1 and 52T through GOOSE For example

using front pushbuttons located at Relay 2 to close or open 52M1breaker or 52T breaker

By careful selection of relay part numbers and program the relay logictrip circuit monitoring function for the output contacts used for breakertripopen purpose can be obtained in these relays No need forseparate trip coil monitoring devices



15

GOOSE Double-Ended SubDig i t a l input s needed for Relay 1

52A and TOC for 52M1 52A and TOC for 52T HRG GF from Transformer 1 (if using HRG system)

94T1 upstream schemebreaker trip (94T1 may come fromGOOSE instead) Transformer 1 common trip or individual trip signal 63X 26HH

71LL etc Bell alarm for 52M1 and 52T (for LVCB applications if needed) Local control switch CO commands for 52M1 and 52T Physical 10-Switch used to select 52M1 or 52T as the breaker

to trip [instead they may come from VIs (or RBs) or local PBs] Optional Remote closeopen commands for 52M1 and 52T

from remote (SCADA DCS HMI etc) through communicationpath



16

GOOSE Double-Ended SubDig i t a l input needed for Relay 2

52A and TOC for 52M2

HRG GF from Transformer 2 (if HRG system)

94T2 upstream scheme trip (94T2 may come from GOOSEinstead)

Transformer 2 common trip or individual trip signal 63X 26HH71LL etc

Bell alarm for 52M2 (for LVCB applications if needed)

Local control switch CO commands for 52M2

Physical 10-Switch used to select 52M2 as the breaker to trip[instead they may come from a VI (or RB) or a local PB]

Optional Remote closeopen commands for 52M2 from remote(SCADA DCS HMI etc) through communication path



17

GOOSE Double-Ended SubAuto t rans fer p rocess

Example Transfer power from two sources to only Source 2

Open-transition (Break-Before-Make) transfer

Line 1 voltage drops for some time (1-3s)

52M1 opens automatically Before closing 52T need to ensure

bull Bus 1 voltage (residual voltage) decays to a safe level

bull And 52M1 is already open

bull And 52M2 is already closedbull And Line 2 voltage is healthy

bull And Line 2 Tx 2 has no fault Then 52T closes



18


Transfer power from two sources to only Source 2 Open-transition (Break-Before-Make) transfer Line 1 voltage drops for some time (1-3s) 52M1 opens automatically

Before close 52T needbull Bus 1 voltage (residual voltage) decays to a safety

levelbull And 52M1 is already openbull And 52M2 is already closed

bull And Line 2 voltage is healthybull And Line 2Tx 2 has no fault

Then 52T closes Where do I get these signals(Note 52T control logic is in Relay 1)These signals are in Relay 2

Use GOOSE MESSAGE (DIGITAL)

Link IEC61850 GOOSE message setup for Relay 1 and 2 in relay setup programs



19


Transfer from two sources to only Source 1 Open-transition (Break-Before-Make) transfer


52M2 opens automatically Before close 52T need

bull 52M1 is already closedbull And Line 1 voltage is healthybull And Line 1 Tx 1 has no fault

bull And 52M2 is already openbull And Bus 2 voltage (residual voltage) decays to a safety

level Then 52T closes

Where do I get these signals(Note 52T control logic is in Relay 1)These signals are in Relay 2





20

GOOSE Double-Ended SubLog ic w i t h rem ote point s

Example Partial logic for 52T closing command in Relay 1 with remote points (or virtual bits) through GOOSE

These are remote points from aremote device (Relay 2)

through GOOSE messaging



21

GOOSE Double-Ended SubHow m any 25 sync c hec k needed

For a comprehensive transfer scheme three 25sync check elements are needed

25-M1 for closing 52M1 breaker 25-M2 for closing 52M2 breaker

For 25-M1 and 25-M2bull Manual mode LL amp LB or LL amp DBbull Auto RETRF mode (Closed-Transition) LL ampLBbull Sync check needs to get done between line source and bus It has no problem for each relay since

a three-phase line PT and a sing-phase bus PT are wired to each relay

25-T for closing tie breakerbull No strong need for auto TRF and auto RETRF modebull It is needed for manual mode in order to close tie breaker manuallybull Sync check needs to get done between Bus 1 and Bus 2 THIS IS THE CONCERN

52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22

GOOSE Doub le-Ended Sub25-T funct ion fo r t ie break er c los ing

Where can I get 25-T for closing tie breaker Need voltage from Bus 1 and also voltage from Bus 2 Bus 1 voltage is on Relay 1 Bus 2 voltage is on Relay 2 Comparison must be made in Relay 1 since 52T control

logic is in Relay 1 Solution use GOOSE This time they are analog GOOSE

messages Get Bus 2rsquos voltage magnitude frequency andangle from Relay 2 GOOSE them to Relay 1 compare

them in Relay 1 with local (in Relay 1) parameters to makea 25 function for the tie breaker closing The GOOSE analog messages from Relay 2 are the

remote analog inputs (or virtual analog Inputs) for Relay 1



23

GOOSE Double-Ended SubMak e 25-T for t ie break er c los ing

Step 1 Compare remote analogs to local ones in order to convert them to digital tagsbull Remote device = Relay 2bull Local device = Relay 1

bull GOOSE Analog 1 in Relay 1 = Bus 2rsquos voltage magnitude from remote Relay 2bull GOOSE Analog 2 in Relay 1 = Bus 2rsquos frequency from remote Relay 2bull GOOSE Analog 3 in Relay 1 = Bus 2rsquos voltage angle from remote Relay 2

bull In Relay 1bull Setup a maximum voltage difference threshold compare GOOSE Analog 1 to the local

relayrsquos bus 1 voltage magnitudebull Setup a maximum frequency difference threshold compare GOOSE Analog 2 to the local

relayrsquos bus 1 frequency magnitudebull Setup a maximum angle difference threshold compare GOOSE Analog 3 to the local relayrsquos

bus 1 voltage angle

bull In Relay 1bull Setup a digital tag to indicate Bus 2 voltage is healthy or not This tag is created bycomparing GOOSE Analog 1 to a fix value (threshold)

bull Setup a digital tag to indicate Bus 1 voltage is healthy or not This tag is created bycomparing Bus 1 voltage to a fix value (threshold)

bull These two digital tags are used for live Bus 1 amp dead Bus 2 as well as dead Bus 1 and LiveBus 2 situations



24


Step 2 Program relay 25-T logic in Relay 1

bull Closing tie breaker is only allowed when 25-T is passed at the following situationsbull Both buses are alive with their voltage magnitude frequency and angle differences are within

the preset limitbull Live Bus 1 and dead Bus 2bull Dead Bus 1 and live Bus 2

bull 25-T is blocked when both buses are deadbull This means closing tie breaker is not allowed if both buses are dead

Step 3 Apply the newly created 25-T function to tie breaker closing logic

Link GOOSE analog message and 25-T logic setup in setup program



25

Double-Ended Sub GOOSE Cos t Com pari son

Hard wiring connections savingsbull Cost for each hard wiring about $34 (data from last year)

bull Link By using three SEL 351S relays (This does not even include 87T and LTC)bull Link By using three GE SR750 relays (This does not even include 87T and LTC)bull Link By using two substation super relays (With even more features than the above two)

bull See how much cost saving there

Hard wire components savingsbull No need for

bull Physical 10-switchbull Physical breaker control switchesbull Physical lockout relays

Device cost comparisonbull By using traditional seven devices

bull Three feeder relays (typical) $3k x 3 = $9kbull Plus Two transformer relays (typical) $45k x 2 = $9kbull Plus 2 LTC (typical) $15k x 2= $3kbull Total $21k

bull By using two super devices about $9k x 2 = $18k



26

Double-Ended Sub GOOSE t o feeders

52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27

Double-Ended Sub Ex pand t o feeders t hough GOOSE

Trip zone interlocking

Feeder load shedding

Load management for uneven incoming

sources

Fast bus trip scheme



28

GOOSETr ip zone int er loc k ing

Princip le o f reverse in t er lock(ANSI ndash num bers)

M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1

5050--11 pickedpicked upup

ndash ndash F2F25050--11 pickedpicked upup

ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main IncomingOvercurrent protection of outgoingfeeders blocks the50-2 stage (Igtgt) of the overcurrentprotection of the incoming feeder (OC-Feed4) with the pick-up signal of OC-

functions 50-1 (Igt)

50-2 (Igtgt) stage of theovercurrent protection of theincoming feeder sends a tripsignal after 50-100 ms when no

blocking signal is received fromone or more overcurrentprotection of the outgoingfeeders

1

2

Exchange of digital GOOSE message between main and feeder relaysbull50ms for lt 3 cycle berakers

bull100ms for 5 cycle breakers



29


Review of Buff Bookfor relay coordinationsummary of CTI(Coordination TimeInterval) requirement

Coordination TimeInterval (CTI) betweenupstream static relayand down streamstatic relay gt=200ms

Main breaker shouldnot use 50 function inorder to coordinatewith feeder breakerovercurrent protection

Bus Relays (Main Breaker or Partial Differential) Pickup set between 100 and 125 FLA (150 FLA maximum)Set to coordinate with transformer primary protective relaying

Do not enable the instantaneous overcurrent element on main breaker relays

(From presentation by Dominik Pieniazek and Doug Durand onovercurrent protection coordination on 0216mdash02172010)

Link CTI table by Buff Book

TRADITIONAL WAY TO COORDINATE FEEDER AND MAIN RELAYS



30


Compare to GOOSE trip zone interlocking CTI 50-100msFor 5 cycle breaker breaker operation time 83msLAN relay response and input recognition and output time 8-14msTotal lt100ms

And main breaker protection can use 50 function instead of 51

Benefit for using GOOSE trip zone interlockingbull Reduction of arc flash hazard

bull Ease of relay coordination workbull No hard wiring between relaysbull Easy setup and configuration through softwarebull Peer to peer and multicast communication



31

Double-Ended Sub GOOSE Feeder l oad shed Feeder load shed by under frequency

(81U) or under voltage (27) orcombination of UF and UV from thesource relay (not from the local feederrelay)

Load shed priority depends on how low81U or 27 goes

Flexible load shed level (LSL) is setup atfeeder relays Shed entire load when the source is lost

Example under frequency elements setup in the source relay

Element Freq (Hz) Time (s) Purpose

UF1 5970 15 UF alarm local or GOOSE out

UF2 5950 10 GOOSE out for UF level 1 LSL1


UF4 5850 05 Trip main CB shed entire load

UF5 5800 05 Start a generator if needed

UF6 Not used Use it if necessary

Main

SourceRelay

UF A ND

OR

UV

Fdr

G O O S E ME S S A GI N G

Each fdr relay

also sets its loadshed level

Voltage and frequencymeasurement

Fdr

FdrRelay

FdrRelay



32

Double-Ended Sub GOOSE Feeder l oad shed log ic

Pushbutton assignmentsbull PB5=local close commandbull PB6=local open commandbull PB7=Set this load to load shed level 1 with UF2 from remote device through GOOSEbull PB8=Set this load to load shed level 2 with UF3 from remote device through GOOSEbull PB7 and PB8 are interlocked each other (not shown here) Each feeder can be set to either LSL1 or LSL2 but not both

VO1 is used to drive a relay output to control breaker coils or a motor contactor (setup not shown here) Virtual Inputs (or Virtual Bits) may also be added in order to control the feeders in remote mode

One relay may control one load feeder or may even control up to three load feeders

These areremote points ofunder frequencysignals from thesource relaythrough GOOSE



33

Double-Ended Sub GOOSE Uneven inc om ing sou rc es



34

Double-Ended Sub GOOSE Fast bus t r ip sc hem e

GOOSE communications between feeder relays and maintierelays through Ethernet network

Feeder relays tell maintie relays that if a fault is on feeder If the fault is on feeder associate feeder relay operates to clear

the fault If maintie relay sees the fault but feeder relays do not the fault

is not on feeder it must be on the bus Then maintie relay takesresponsibility

Time delay in maintie relay to coordinate and maintain selective Every relay can just use 50 function reduce arc flash hazard

Maintie relay can also use 50 instead of 51 Fast bus trip Set itwell below maximum fault current but far above maximum loadcurrent

Directional element for tie protection makes the scheme better Replace bus differential scheme



35




36

IEC61850 Double-Ended Sub

Ot her t ype of inc om ing sources What do we call these two super IEC61850 capable relays

Substation IED =gt SubIED

How to select SubIED depends on the needed main protection features

bull For two power transformers as incoming sources the needed main relay protectionfunction is 87TSo SubIED = Transformer Management Relay

bull Other types of incoming source can we do the same thingYes we can same principle and same concept apply

bull SubIED selected needs to meet the following basic requirementsbull Required protection features are availablebull Enough PTCT inputs

bull Enough DIsDOsbull Communication capabilitybull GOOSE capablebull Comprehensive logic capability



37

Double-Ended SubOne generat or and one t ransformer

SubIED 1 =GeneratorManagementRelay

SubIED 2 =

TransformerManagementRelay

52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38

Double-Ended SubTw o genera to rs


SubIED 2 =

GeneratorManagementRelay

52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39

Double-Ended SubOne t ransformer and n generat ors

52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40

Double-Ended SubGenera t ors on bo t h sides 2 SubIEDs

52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41

Double-Ended SubGenerat ors on bot h s i des 1 SubIED

52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42

Double-Ended SubTw o m ains only no t ieNo tie breaker

No problem

Principle and concept arethe same

No need for third 25 elementfor the tie closing

No need for 10-Switcheither physical or soft

No need to use SubIED 1 tocontrol tie breaker SubIED1 and SubIED 2 are nowequal

Apply load shed to feedersfrom SubIEDs UFUVthrough GOOSE

Apply load managementlogic to feeder breakersthrough GOOSE beforeclosing the low capacitysource when loss of the

high-capacity source unlockthe feeders when high-capacity main returns

No need for GOOSE analogmessaging digital only

Depending on what type thesources are SubIEDs couldbe transformer generator orfeeder management relays

52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43

GOOSE Double-Ended SubOt her benef i t w i t h SubIEDs

Built-in event recorder to track back what have been happening in the system Built-in Waveform captures to help analysis of system faults Use the relay built-in network channel failure tags to get notifications for the status of relay

communications Use user programmable pushbuttons locally with a time delay or use virtual inputs (remote

bits) remotely to close or open breakers No need for PPE

Use user programmable pushbuttons locally or use virtual inputs (remote bits) remotely tosetup virtual 10-Switch No physical 10-switch is needed Reduce production cost

Use user programmable pushbuttons locally or use virtual inputs (remote bits) remotely tosetup auto transfer enabledisable and auto retransfer enabledisable switches No physicalswitches are needed Reduce production cost

Use relay internal logic to trip and block closing breaker no physical 86 switch is neededReduce production cost (subject to customerrsquos choice)

Assign custom LEDs to help operators to check operation status

Use force contact inputs force virtual inputs (remote bits) and force contact output etcfeatures (these are normally PLC features but now they are merged in to protection relays)to ease factory test procedures

Make your own digital tags by using analog comparison feature (This is usually a PLCfeature now it is in the relay too)

Some relays offer online logic monitoring This would be a great tool for programmingdevelopment and trouble shooting



44

GOOSE Double-Ended SubSubIEDs redundanc y

Communication redundancybull Use two fiber cables (for Communication Method 1)

Orbull Use two Ethernet switches (for Communication Method 2)

Relay redundancy

bull Use total 4 SubIEDs instead of 2bull Two for primary service and the other two for backup service

bull Backup service is triggered bybull Either relay in primary service is failed (through hardwire contact)

Orbull Both communication ports failed indicated by

Both Operand PRI ETHERNET FAIL and operand SEC ETHERNET FAILare turned on at the same time for a preset period of time

Result System reliability increases with the price of added costand system complexity



45

Fac i l i ty fo rDeve lopment and Sim ula t ion Test ing



THANK YOUFOR YOUR TIME AND ATTENTION

Acknowledgements

Powell Electrical Systems Inc

GE Digital Energy Multilin



2

IEC61850

What is GOOSE IEC61850 Substation Communication Standard one technology one standard one world for substation

communications Ethernet network based communications between IEC61850 compatible devices

No serial (RS232 RS485 RS422 etc) communication no RTU Every manufacturer follows the same rules universal self-descriptive tag addressing



3

IEC61850



HMI Computer




4

IEC61850

GOOSE How fas t




about 12ms


about 500ms






Total 8-14ms


Station LAN




52Breaker

Output

Ethernet Switch



5

GOOSE m essaging




6

GOOSE m essaging


52M1 52M2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

NC NC

NOFEEDERS

on Bus 2

FEEDERSon Bus 1

Note






GF on both sides






7


New approach


52M1 52M2

3PH

D or Y

SOURCE 1 SOURCE 2

Tx1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



8


----Pros

bullSimple




----Cons








9


52M1 52M2

PORT 2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I NE 1

BUS 1 BUS 2

L I NE 2

52T

NC NC

NOFEEDERS

ON BUS 2

FEEDERS

ON BUS 1



10









capability also







11




bull Control

bull Other




12




bull Power factor





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





3

IEC61850



HMI Computer




4

IEC61850

GOOSE How fas t




about 12ms


about 500ms






Total 8-14ms


Station LAN




52Breaker

Output

Ethernet Switch



5

GOOSE m essaging




6

GOOSE m essaging


52M1 52M2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

NC NC

NOFEEDERS

on Bus 2

FEEDERSon Bus 1

Note






GF on both sides






7


New approach


52M1 52M2

3PH

D or Y

SOURCE 1 SOURCE 2

Tx1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



8


----Pros

bullSimple




----Cons








9


52M1 52M2

PORT 2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I NE 1

BUS 1 BUS 2

L I NE 2

52T

NC NC

NOFEEDERS

ON BUS 2

FEEDERS

ON BUS 1



10









capability also







11




bull Control

bull Other




12




bull Power factor





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





4

IEC61850

GOOSE How fas t




about 12ms


about 500ms






Total 8-14ms


Station LAN




52Breaker

Output

Ethernet Switch



5

GOOSE m essaging




6

GOOSE m essaging


52M1 52M2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

NC NC

NOFEEDERS

on Bus 2

FEEDERSon Bus 1

Note






GF on both sides






7


New approach


52M1 52M2

3PH

D or Y

SOURCE 1 SOURCE 2

Tx1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



8


----Pros

bullSimple




----Cons








9


52M1 52M2

PORT 2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I NE 1

BUS 1 BUS 2

L I NE 2

52T

NC NC

NOFEEDERS

ON BUS 2

FEEDERS

ON BUS 1



10









capability also







11




bull Control

bull Other




12




bull Power factor





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





5

GOOSE m essaging




6

GOOSE m essaging


52M1 52M2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

NC NC

NOFEEDERS

on Bus 2

FEEDERSon Bus 1

Note






GF on both sides






7


New approach


52M1 52M2

3PH

D or Y

SOURCE 1 SOURCE 2

Tx1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



8


----Pros

bullSimple




----Cons








9


52M1 52M2

PORT 2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I NE 1

BUS 1 BUS 2

L I NE 2

52T

NC NC

NOFEEDERS

ON BUS 2

FEEDERS

ON BUS 1



10









capability also







11




bull Control

bull Other




12




bull Power factor





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





6

GOOSE m essaging


52M1 52M2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

NC NC

NOFEEDERS

on Bus 2

FEEDERSon Bus 1

Note






GF on both sides






7


New approach


52M1 52M2

3PH

D or Y

SOURCE 1 SOURCE 2

Tx1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



8


----Pros

bullSimple




----Cons








9


52M1 52M2

PORT 2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I NE 1

BUS 1 BUS 2

L I NE 2

52T

NC NC

NOFEEDERS

ON BUS 2

FEEDERS

ON BUS 1



10









capability also







11




bull Control

bull Other




12




bull Power factor





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





7


New approach


52M1 52M2

3PH

D or Y

SOURCE 1 SOURCE 2

Tx1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



8


----Pros

bullSimple




----Cons








9


52M1 52M2

PORT 2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I NE 1

BUS 1 BUS 2

L I NE 2

52T

NC NC

NOFEEDERS

ON BUS 2

FEEDERS

ON BUS 1



10









capability also







11




bull Control

bull Other




12




bull Power factor





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





8


----Pros

bullSimple




----Cons








9


52M1 52M2

PORT 2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I NE 1

BUS 1 BUS 2

L I NE 2

52T

NC NC

NOFEEDERS

ON BUS 2

FEEDERS

ON BUS 1



10









capability also







11




bull Control

bull Other




12




bull Power factor





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





9


52M1 52M2

PORT 2

SOURCE 1 SOURCE 2

Tx 1 Tx 2

L I NE 1

BUS 1 BUS 2

L I NE 2

52T

NC NC

NOFEEDERS

ON BUS 2

FEEDERS

ON BUS 1



10









capability also







11




bull Control

bull Other




12




bull Power factor





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





10









capability also







11




bull Control

bull Other




12




bull Power factor





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





11




bull Control

bull Other




12




bull Power factor





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





12




bull Power factor





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





13







14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





14










15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





15









16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





16












17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





17












18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





18











19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





19













20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





20







21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





21







52M1 52M2

52T

SOURCE 1 SOURCE 2

BUS 1 BUS 2

25-M1 25-M2

25-T



22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





22









23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





23







bus 1 voltage angle






24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





24










25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





25












26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





26


52M1 52M2

3PH

D or Y

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

3PH

CT

INPUT

NC NC

NO

FEEDERS

ON BUS 2

FEEDERS

ON BUS 1



27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





27





sources




28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





28



M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

1

Power flow

2

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2

Main Incoming


M

OC-Feed3OC-Feed2

OC-Feed4

OC-Feed1

T = 50 - 100ms

+ ++

Blocking-

signal

11

Power flow

222

50-1 picked up

- F1



ndash ndash F3F3

gtBlock 50-2





1

2





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





29












30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





30








31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





31













Main

SourceRelay

UF A ND

OR

UV

Fdr


Each fdr relay



Fdr

FdrRelay

FdrRelay



32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





32








33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





33




34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





34











35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





35




36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





36











37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





37



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Tx 2

L I N

E 1

BUS 1 BUS 2

L I N

E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NO NC

NC FEEDERSON BUS 2

FEEDERS

ON BUS 1



38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





38



SubIED 2 =


52M1 52M2

3PHD or Y

SOURCE 1 SOURCE 2

Gen 1 Gen 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

1PHPT

INPUT

3PHCT

INPUT

3PHCT

INPUT

NC NC

NO FEEDERSON BUS 2

FEEDERSON BUS 1



39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





39


52M1 52M2

3PH

D or Y

SOURCE 1

SOURCE 2

Gen 1 Tx 2

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

1PH

PT

INPUT

3PH

CT

INPUT

NO NC

NC FEEDERS

ON BUS 2FEEDERS

ON BUS 1



40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





40


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PH

D or Y

NC

NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





41


52M1 52M2

SOURCE 1 SOURCE 2

Gen 1

L I N E 1

BUS 1 BUS 2

L I N E 2

3PHD or Y

NC NC

NO FEEDERS

ON BUS 2FEEDERS

ON BUS 1



42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





42


No problem










52M1 52M2

3PH

D or Y

SOURCE 1

Tx or Gen

L I N E

1

BUS BUS

L I N E

2

3PH

D or Y

1PH

PT

INPUT

3PHCT

INPUT

3PH

CT

INPUT

NC NO

FEEDERS

ON BUSFEEDERS

ON BUS



43














44




Relay redundancy








45





Acknowledgements





43














44




Relay redundancy








45





Acknowledgements





44




Relay redundancy








45





Acknowledgements





45





Acknowledgements






Acknowledgements



Documents

4 GooseTexasAMPresR01