• INSTRUCTIONS

STATIC, THREE PHASE DIRECTIONAL PHASE

DISTANCE RELAY

TYPE SLY81 A, SLY81 B

GENERAL ELECTRIC

GEK-498610

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TABLE OF CONTENTS

PAGE DESCRIPTION • • • • • • • • • • • • • • • • 3 APPLICATION • • • • • • • • • • • • • • • • • • • • • 4 RATINGS • • • • • • • • • • • • • • • • • • • 4

GENERAL • • • • • • • • • • • • • • • • • • • • 4 SURGE WITHSTAND CAPABILITY • • • • • • • • • • • • • • 6 POWER SUPPLY • • • . • • • • • • • • • 6 CONTACTS • • • • • • • • • • • • • • • • • • • • 6 TARGET • • • • • • • • • • • • • • • • • • 6

CHARACTERISTICS • • • • • • • • • 7 OPERATING PRINCIPLES • • • • • • • • • • • • • • 7 RELAY REACH • • • • • • • • • • 8 OPERATING TIME • • • • 8 SENSITIVITY • • • • • • • • • • • • • • • 8 BURDENS • • • • • • • • • • • • • • • • • • • • • • 10 CIRCUIT DESCRIPTION • • • • • • • • • • • • • • • 11

CALCULATIONS OF SETTINGS • • • • • • • • • • • • • • • • • 13 MOB SETTING • • • • • • • • • • • • • • • • 14

CONSTRUCTION • • • • • • • • • • • • • • • • • • • • • • • • • • 15 RECEIVING, HANDLING, AND STORAGE • • • • 16 ACCEPTANCE TESTS • • • • • • • • • • • • • • • • • • • 17

VISUAL INSPECTION • • • • • 17 MECHANICAL INSPECTION • • • • • • • • • • • • • 17

Cradl e and Case Bl ocks • • • • • • • • • 17 Hi-Seismic Target Unit • • • • • • • • • • • • • • • • 17 Tel ephone Rel ay • • • • • • • • • • • • • • 18 El ectrical Test, General • • • . • • • • • • • • • • • 18 Diel ectric Tests • • • • • • • • • • • • • • • • • • 18 Detail ed Testing Instructions • • • • • • • • 19

1 . Required Settings • • • • • • • • • • • • • • • 19 2 . Relay Base Reach Angl e and Reach Check • • • • • • • • • • 19 3 . Testing Mho Characteristics • • • • • • • • • . • • • 21 4. Al ternate Test Method for Reach Tests 22 5 . Integrating Timer Tests . • • • . . • • • • 22 6 . Overcurrent Supervision Tests . • • • • • . • • • 23 7 . MOB Tests • . • • • • • • • • • • • • • • • 24

INSTALLATION PROCEDURE . • . . • • • • • • • • • • 25 INTRODUCTION • • • • • • • • • • • • • • • • • • 25 SURGE GROUND AND RELAY CASE GROUND CONNECTIONS • • • • • 25 TEST PLUGS • • • • . • • • • • • • • • • • 26 INSTALLATION TESTS • • • • • • • • • • • • 26

PERIODIC TESTING AND ROUTINE MAINTENANCE • • • • • • • • • • 27 CONTACTS • • • • • • • • • • • • • 27 ELECTRICAL TESTS • • • • • • • • • • • • • • 27

SERVICING • • • • • • . • • • • • • • • • • • • • 28 RENEWAL PARTS • • • • • • • • • • • • • • • • • • • • • 29 APPENDIX I • • • . • • • • • • • • • • . • • • 31 APPENDIX II . • • • • • • • • • 32 LIST OF ILLUSTRATIONS • • • • • • • • • • • • • • • • • • • 34

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STATIC, THREE PHASE DIRECTIONAL PHASE DISTANCE RELAY TYPES SLY81A AND SLY81B

DESCRIPTION

The Type SLY81A r e lay i s a t h r e e phase, f i r s t or second z o ne s t a t i c pha s e d i s tance r e l ay . It i s ava i lable w i th r a t i ng s of 6 0 he r t z, f i ve ampe r e s ( 5 amps ) ; 5 0 he r t z, f ive ampe r e s ( 5 amps ) ; and 5 0 he r t z, one ampe r e ( l amp ) . F ive ampe r e ( 5 amps ) r a t ed r e lays a r e ava i l ab l e w i t h con t i nuou s ly adjus table ohmic r each r anges of 0 . 1 to 4 ohms phase- to-neut r a l or 0 . 7 5 to 3 0 ohms phase-to-neu t r a l . One ampe r e ( 1 amp ) r a t ed r e l ays are ava i lable w i t h ohm i c r each r a nges of 0 . 5 t o 2 0 ohms or 3 . 7 5 t o 150 ohms . DC Powe r supply vol t ages ava i lable are 48, 1 1 0, or 1 2 5 . A 2 5 0 vol t r a t i ng is ava i l abl e w i th a n e x t e r nal p r e - r egulator . Con tact outpu t s a r e p r ov i ded f o r t r ipp i ng ( two con t a c t s each w i t h t a r g e t ) and a contact conne cted to pos i t ive f o r aux i l i a r y funct ions . The r e lay i s mounted in a deep, l a r g e s i z e, doubl e-ended d r awou t ( L 2D ) case .

The Type SLY81B i s s im i l a r to an ou t - o f - s t ep block i ng c i r cu i t, cond i t i on, ope r a t e s a norma l l y con t r ol l i ng a n aux i l ia r y r e lay .

Type SLY81A except that i t conta i ns MOB, wh ich du r i ng an o u t -of - s t ep

open output con tac t s u i table f o r

The Type SLY81 r e lays may b e used i n a " s t epped d i s tance" p r o t e c t io n scheme as the f i r s t, second or t h i r d zone of pha s e p r o t ec t ion . I t may a l so b e used as an u nde r r each i ng o r ove r r each i ng t r ipp i ng r e lay i n a ny of t he d i rect i onal compa r i son s cheme s . If the d i r e c t i onal compa r i son s chemes u s e phase d i s tance block i ng r e l ay s, the Type SLY82A block i ng r e lay ( i ns t r uct ion book GEK- 4986 2 ) shou ld be u s ed to co- o r d i nate w i t h the SLY8l t r ipp i n g r e lay .

The SLY81 r e lay has a "va r i able mho'' characteristic, which p r ov ides an opt imum accommoda t ion of a r c r e s i s tance .

The f unct ional block d i ag r am i s shown i n F i g u r e 1 . Inte r nal connec t ions for the SLY81A and SLY81B are shown in F i g u r e s 2 a nd 3 r e spec t ively . Typical ext e r nal connect ions a r e shown i n F i g u r e 4 .

These instructions do not purport to cover all details or variations in equipment nor provide for every possible contingency to be met in connection with installation, operation or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser's purposes, the matter should be referred to the General Electric Company.

To the extent required the products described herein meet applicable ANSI, IEEE and NEMA

standards; but no such assurance is given with respect to local codes and ordinances because they vary greatly.

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APPLICATION The SLY81 relay utilizes a three input phase angle comparator for

the phase distance measurement. The three inputs for the phase A-B measurements are:

(a) (IA - Ia) Za1 - T VAB (b) VAB + KVABl (C) ( IA - I a) Za1

Operating Quantity Polarizing Quantity Overcurrent Supervision

where

TVAB

VAB + KVABl

are the currents in the faulted phases.

is the base reach impedance with an impedance angle of 85°.

is the faulted phase-to-phase voltage, multiplied by the restraint setting T.

is the faulted phase-to-phase voltage plus K times the positive sequence component of the faulted phase-to-phase voltage. K is a design constant equal to 0. 3 per unit.

The use of the positive sequence component of voltage in the polarizing signal results in a relay characteristic of the "variable mho" type� that is, the characteristic expands as the source impedance behind the relay increases, providing an automatic accommodation of increasing arc impedance. The positive sequence component of voltage in the polarizing signal also improves the directional integrity of the distance measurement.

The third input of the comparator provides an overcurrent supervision function. This input is adjustable so that it can be set above load current but below the minimum fault current in order to provide security from mis-operation due to potential failure.

The SLY81 has a characteristic which is adjusted by means of the setting on the characteristic timer. For short lines a circular characteristic is recommended, but, for longer lines, lines with unusually heavy load transfer, or three terminal lines where very large reach settings are applied, a lens shaped characteristic is recommended.

RATINGS GENERAL

Type SLY81A and SLY81B relays are designed operation in ambient temperatures between -20° C and standard C37. 90. In addition, these relays will not be damaged if operated in an ambient up to 65°C.

for continuous +55°C per ANSI

malfunction nor

The current circuits of the relays which are rated five amperes ( 5 amps} rms will carry 10 amperes continuously and will carry 250 amperes for one second (1 sec). The current circuits of the relays

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w h i ch a r e r a ted one amper e ( 1 amp ) rms w i l l ca r ry two amp e r e s ( 2 amp ) rms cont i nuou s ly and w i l l ca r r y 5 0 ampe r e s rms for one s econd . The pot ent i a l c i r cu i t s a r e r a ted 69 vol t s rms l i ne - t o-neut r a l and w i l l w i t h s tand 1 1 0 % o f t h i s value con t i nuou s ly .

Thes e r e lays a r e ava i lable w i th e i ther s ho r t o r long impedance r a n g e s as s hown in Table I

TABLE I

AVAILABLE REACHES

Relay Current Circuit Base Reach Tap In Impedance Range In Rating Amperes Type Positive Sequence Ohms Positive Sequence Ohms

ZR1 ZR

5 SHORT 0 . 1 0.1 to 1.0 5 SHORT 0.2 0 .2 to 2.0 5 SHORT 0.4 0.4 to 4 . 0

5 LONG 0 . 75 0.75 to 7.5 5 LONG 1 . 5 1 . 5 to 15 . 0 5 LONG 3 .0 3.0 to 30.0

1 SHORT 0 . 5 0.5 to 5.0 1 SHORT 1 . 0 1.0 to 10 . 0 1 SHORT 2 . 0 2.0 to 20.0

1 LONG 3.75 3.75 to 37.5 1 LONG 7 . 5 7.5 to 75.0 1 LONG 15.0 15.0 to 150.0

Se l e c t ion of the des i r ed base r each tap (ZRl ) i s made by means o f t he t h r ee tap s c r ews a t t h e lower r e a r of t h e r e lay ( s ee F i gu r e 5 ) . Al l t h r ee tap s c r ews ( A, B, C ) mu s t be i n equa l ohm i c tap pos i t ions .

The r e lay r each ( ZR) of the r e l ay i s con t i nuou s l y adjus t ab l e, w i th i n t he r ange s hown i n Table I for a par t i cu l a r tap, by mean s of a t h r ee-gang-pr ec i s ion pot e n t i ome t e r at the lowe r f r ont of the r e lay ( see F i g u r e 6 ) . The 1 0 - t u r n dial of t h i s potentiometer is ca l ib r a t ed i n pe r c e n t r e s t ra i nt s e t t i ng ( T ) and i s adjus tab l e f r om 1 0 % ( f u l l y cou n t e r c lockw i s e ) t o 1 1 0 % ( f u l l y c lockw i s e ) . The max imum recommended s e t t i ng is 1 0 0 % . An enla r g ed p i c t u r e of the d i a l is shown in F i g u r e 7 .

The r elay r each i s g i ven by equa t i on ( 1 ) :

whe r e, T =

ZR = ZRl =

Relay Rench = ZR = 100 X ZRl

T

Res t r a i nt s e t t i ng i n pe r cent Relay r each in ohms Ba s e r each tap i n pos i t ive sequence ohms

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The r e lay r each s hou ld be w i th i n 5 % of the value g i ve n by equa t i on ( 1 ) if the ambient tempe r a t u r e i s w i t h i n the r a t ed r a n g e of - 2 0°C t o + 5 5°C .

SURGE WITHSTAND CAPABILITY

Thes e r e lays wi l l wi t h s tand ANSI C 3 7 . 9 0A- 1 9 7 4 s u r g e t e s t w i thout i nco r r e c t ope r a t i on o r damage to any componen t .

POWER SUPPLY

Model s are ava i lable w i t h r a t i ngs of 4 8 vol t s DC ( 3 8 t o 56 vol t s ) , 1 1 0 vol t s DC ( 8 8 to 1 2 0 vol t s ) , o r 1 2 5 vol t s DC ( 1 0 0 to 1 4 0 vol t s ) . The powe r suppl y conta i n s a DC- to-DC conve r t e r t o p r o v i de i so l a t i o n between the DC i nput cont rol powe r and the sol i d s ta t e c i r cu i t ry of the r e lay . On r e lays w i t h DC cont r o l vol tage i n e x c e s s of 1 2 5 vol t s, an ext e r na l p r e - r egulator i s used . Th i s r educes the cont r o l vol tage to 1 2 5 vol ts, s u i table fo r i npu t to the r e l a y t e rm i na l s .

CONTACTS

The t r ip con tac t s w i l l make and ca r ry 3 0 amper e s fo r t r i pp i ng du t y . The i r con t i nuous cu r r ent r a t i ng s a r e l im i t ed by the t a r g e t r a t i ng s a s l i s t ed i n Table II .

The MOB con t a c t s i n t ype SLY81B w i l l make and c a r r y con t i nuou s l y t h r ee ampe r e s ( 3 amps ) .

The i n t e r r upt i ng r a t i ng s of both type s of con t a c t s a r e l i s t ed i n Tab l e II .

TABLE II

INTERRUPTING RATINGS IN AMPERES OF OUTPUT CONTACTS

TRIP OUTPUT CONTACTS MOB OUTPUT CONTACT (SLY81 ONLY} VOLTAGE INDUCTIVEtt NON-INDUCTIVE INDUCTIVEtt NON-INDUCTIVE

115 vol ts AC 0.75 2.0 0.3 0.8 230 vol ts AC 0.5 1.0 0.15 0.4

48 vol ts DC 1.0 3.0 0.4 2.0 125 vol ts DC 0.5 1.5 0.2 0.8 250 vol ts DC 0.25 0.75 0.1 0.4

tt The i nduc t i ve r a t i ng s a r e based on an L/R ra t1o of 0 . 0 4 s econd .

TARGET

A t a r ge t s ea l - i n un i t w i t h 0 . 6 and 2 ampe r e taps i s p r o v i ded fo r the output contact be tween t e rm i n a l s 1 1, 1 2, and 1 3 . A ta r g e t w i t h t h e same taps i s p r ov i ded fo r the contact be tween t e rm i n a l s 1 4 and 1 8 . The r a t i ng s of each of these t a r g e t s a r e g i ven i n Tab l e III .

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Minimum Operating Carry Continuously Carry 30 Amps for Carry 10 Amps for DC Resistance 60 Hertz Impedance

OPERATI NG PRINCI PLES

GE K-49861

TABLE I I I

TARGET RAT INGS

0.6 Amp Tap

0.6 1.2 0.5 5 0.78 6.2

amps amps second seconds ohm ohms

CHARACTERISTICS

2.0 Amp Tap

2.0 2.6 3.5

30 0.18 0.65

amps amps seconds seconds

ohm ohm

The mho cha r a cter i s t i c i n the SLY8 1 i s obt a i ned by conve r t i ng r e lay cu r r en t s i n t o vol tage s i gna l s ( I Z ) , comb i n i ng these I Z s i g n a l s w i th s ig n a l s propo r t i ona l to t h e l i ne voltage (V) , and mea su r i ng the angle be tween the app ropr iate comb i na t i ons to obt a i n the des i r ed cha r a c te r i s t i c .

Cu r r e n t s a r e conve r t ed i nto I Z s i gnals by means of t r ansac t o r s (XA, X8, and Xc) wh i ch a r e a i r gap r eactor s w i th seconda r y w i nd i ng s . The t ransac t o r s a r e tapped on the pr ima r y to prov ide the ba s i c ohm i c t ap s e l ec t i on o f 0 . 1, 0 . 2, or 0 . 4 ohms ( 5 amper e r a t ed ) f o r t h e s ho r t r each r e lay o r 0 . 7 5, 1 . 5, o r 3 ohms ( 5 ampe r e rated ) f o r the long r each r e lay . The one ampe r e ( l amp ) r a t ed r e lay t aps a r e 0 . 5, 1 . 0, o r 2 . 0 for the shor t r each r e lay and 3 . 7 5, 7 . 5, or 1 5 ohms for the long r each r e lay .

The z of the I Z quant i t y i s the t ra n s f e r impedance of t h e t r an sac t or a nd i s equal to VouT/IrN. The t r ansactor seconda r i e s have load i ng r e s i s to r s a c r o s s them . These r e s i s to r s p r ov ide the des i r ed ang l e VouT and IrN· Th i s ang le dete rmi nes the ba se r each ang le of the r e lay .

A t h i rd s igna l, cons i s t i ng of I Z only, i s a l so compa r ed to p r ov i de ove r cu r r en t supe r v i s ion. The mag n i t ude of t h i s s i g nal i s adjus t ab l e so that i t can be s e t be tween maximum load cu r r e n t a nd m i n imum fau l t cu r r ent for the l i ne be i ng protec ted .

The pha s e angle between the three s i gnals i s compa r ed i n a "Co i nc i dence Log i c" ( CL ) c i r cu i t wh i ch put s ou t a r ec tangu lar vol t age pu l s e when these s i gnal s are coincident . The w i d t h of t h i s b lock of vol t ag e i s mea s u r ed by an "Integ r a t i ng T imer" ( I T ) ci r cu i t wh i ch p r ov i d e s a t r ip s i gnal ou tput when the pul s e w i d th exceeds a p r e s e t du r a t i on . I f t h e t ime r i s s e t f o r goo ( that i s , 4 . 1 6 mi l l i s econds in a 60 he r tz s y s t em ) , a c i r cular R-X cha r ac te r i s t i c is obta i ned . I f the t ime r i s s e t for l e s s t han goo, a cont racted c i r c l e ( l ens shaped ) i s obt a i ned . Relays a r e sh ipped f r om the factory w i t h the t imer s e t f o r goo.

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The t im i ng d i a g r am for a typi ca l cond i t i on i n shown i n F i g u r e 8 .

RELAY REACH

The ba lance po i n t of the r e lay i s de f i ned as the poi n t at wh i ch the ope r a t i ng quant i t y goes to a nu l l whi ch, f o r pha s e AB, i s:

o r

whe r e

Fo r a pha s e

The r each of

Res t ra i n t s e t t i ng in pe r cent Base r each tap i n pos i t i o n s equence ohms

A to pha se B fau l t whe r e IA = -Ia

VAB =

2/AZRI X 100 T the r e lay i s de f i ned a s:

VAB lOOZRI ZR = 21A = T Relay Reach inOhms

To s e t the r e l ay for the des i r ed r each, i t i s neces s a r y to f i r s t s e l e c t the p r ope r "Ba s e Reach Tap" . Th i s tap shoul d be the h i gh e s t "Ba s e Reach Tap" that i s sma l l e r than t h e des i r ed ohm i c r each. The s e t t i ng o f the "Ba s e Reach Tap'' is explai ned und e r the s e c t i on t i t l ed CONSTRUCTION i n this book . A f t e r the "Bas e Reach Tap" i s s e l e c t�d the "Pe r cent Re s t r a i n t Set t i ng" may now be chosen to produce the required relay r each .

OPERATING TIME

Ope r a t i ng t ime i s a funct ion of the length o f l i ne be i n g p r o t e c t ed, t h e s ou r ce impedance and the loca t ion o f t h e f a u l t . F i g u r e 9 shows the average ope r a t i ng t ime f o r a t ype SLY81A r el a y when s e t f o r f i r s t zone protec t i on of a typ i ca l 100 mi l e rad i a l t ra n smi s s i on l i ne w i th a sou r c e impedance equ i val ent to a 2 5 m i l e l i ne. F i g u r e 1 0 shows the ave rage ope r a t i ng t ime f o r the same l i ne when the r e l a y i s s et f o r second zone protec t i on .

Append i x I I shows a method of ca l cula t i ng ave rage ope ra t i ng t ime for a s pe c i f i c t r ansm i s s i on l i ne and sou rce combi na t i on .

SENS I TIVI TY

Sens i t i v i ty i s def i ned as the s t eady s ta t e rms vol tage o r cu r r e n t ( a t t h e r e l a y t e rm i na l s ) r equ i r ed f o r a pa r t i cu l a r qua nt i t y t o p i c k u p t h e r elay i f a l l qua nt i t i es a r e i n the opt imum pha s e r e l a t i on sh i p .

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The nominal sensitivities for the signal quantities in the SLY81 relay are as follows:

1. Polarizing Sensitivity:

Sensitivity is one percent (1%) of rated voltage.

2. Overcurrent Supervision Sensitivity:

Sensitivity is adjustable over the range shown in Table IV.

TABLE IV

OVERCURRENT ADJUSTMENT RANGE

BASE REACH TAP ADJUSTMENT RANGE IN IN OHMS 0-0 AMPERES RMS

0.1 4 - 10 0.2 2 - 10 0.4 1 - 10

0.75 0.52 - 10 1.5 0.26 - 10 3.0 0.13 - 10

0. 5 0.8 - 2 1.0 0. 4 - 2 2.0 0.2 - 2

3.75 0.11 - 2 7.5 0.052 - 2

15.0 0.026 - 2

3. Operate Circuit Sensitivity:

See Figure 11 for sensitivity in terms of VLL x 1!!1 100

The current sensitivity for phase pair A-B is given by the relationship:

where:

(I _ I ) Z = 0.032 (1 rated) A B Rl 1- X

X = Actual Relay Reach Nominal Relay Reach

For example, if X = 0.8 and ZR1 = 3 ohms, then:

I - I = 0·16 = 0.27 amperes A B 3(1-0.8)

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Fo r a phas e t o phase fau l t whe r e IA - - I s,

o r

BURDENS

IA - Is = 2 IA = 0 . 27 ampe r e s o r IA = 0 . 1 3 ampe r e s

S i m i l a r l y f o r a thr e e pha se fau l t:

I A - IB = l/3 IA = 0 . 27 ampe r e s

IA = 0 . 15 ampe r e s

The poten t i a l c i r cu i t bu rden pe r phase at 120 vol t s RMS i s 0 . 4 vol t -ampe r e s , 0 . 2 wa t ts, 0 . 35 va r s .

The cu r r ent c i r cu i t impedance pe r c i r cu i t mea su r ed a t r a t ed cu r r ent i s g i ven i n Table V below .

TABLE V

CURRENT C IRCUI T BURDENS

RELAY CURRENT RATING --=5'---A':::": M.:..:,P� E R=-= E= S __ -=1=--A'::": M.:..:, P�E==-RE CURRENT CIRCUIT PHASE PHASE

Impedance, Z, in ohms 0.030 0.210

Resistance, R, in ohms 0.027 0.200

Reactance, X, in ohms 0.013 0.065

The cu r r e n t r equ i r emen t s at the DC cont rol powe r i npu t ( s t uds 1 9 and 2 0 ) a r e g i ven i n Tabl e V I be low .

TABLE VI

DC CONTROL C IRCUI T BURDENS

RELAY RATED DC VOLTAGE

CONDITION OF CONTROL CIRCUIT OUTPUT RELAY K2 BURDEN IN MILLIAMPERES

48 Dropped Out 48 Picked Up

110 Dropped out 110 Picked Up 125 Dropped Out 125 Picked Up 250 Dropped Out 250 Picked Up

t Input to Studs A and C of external

10

200 315

90 175 80

155 250t 250t

pre-regulator

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C I RCU I T DESCR I PT I ON

The F i g u r e s bo t toms r e lay s . V I I .

i nt e r na l connec t i ons for types SLY8 lA and SLY 8 lB a r e shown i n 2 and 3 r e spect ively . The t e rm i na l numbe r s a t the top s and of these d i ag r ams r epresent the e x t e r na l conne c t ions to the

The e x t e r na l connec t ions can be g r ouped as shown in Table

TABLE VI I

EXTERNAL CONNECTIONS

TERMINAL NUMBERS DESCRIPTION

1 through 6 7 and 8 9 10 11 through 13 14 through 18 15 through 17 19 and 20

AC current inputs MOB output contact (SLY81B only) Trip contact {other end connected to #19) Surge ground Trip contact with target seal-in Trip contact with target AC potential inputs DC control power input

The l i ne-to- l i ne i nput vol tages a r e connected to the p r ima r i e s of s t ep down pot ent i a l t r ans forme r s ( TA, Ta, and Tc ) . The seconda r i e s of t h e s e pot ent i a l t r ansforme r s a r e connec ted to the s i gnal proce s s i ng ( SP ) c a r d a s we l l a s to a thr ee-gang potent iome t e r . The vol t ag e s on the s l ide r s of the pot ent iome t e r s a r e also connected as i npu t s to the SP ca r d .

The i npu t pha s e cu r r e n t s pa s s t h r ou g h t h e p r i ma r i e s o f t r ansac tor s ( XA, Xa and Xc ) . The t r ansa c t o r s p r oduce seconda r y vol t ag e s p r opo r t i onal t o t he i r pr ima r y cu r r e n t s i n mag n i t u de; howev e r , the s econda r y vol t a g e s l ead t h e i r r e spec t i ve p r i ma r y cu r r e n t s by a phase ang le of 8 5° . Taps a r e prov ided on the pr ima r i e s o f these t r ansacto r s and the seconda ry vol tag e s a r e connec t ed a s i npu t s t o the S P card .

TABLE VI I I

OUTPUTS FROM SP CARD

OUTPUT SIGNAL FROM SP CARD INPUT TO CARD

VAB. ABC. VCA

{IA - IB)ZR1 X CAtt

{IB - IC)ZR1 X CBtt

(IC - IA)ZR1 X Cctt

(IA - IB)ZR1 - TVAB

(IB - Ic)ZR1 - TVBC

(IC - IA)ZR1 - TVCA

Combined Polarizing {CP)

Coincidence Logic (CL)

Operate Signal {OS)

tt CA, CB, Cc are constants which are adjustable from approximately 0 to 0.9 to permit adjustment of overcurrent

supervision.

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The SP ca r d comb i nes the previou s l y me n t ioned quan t i t i e s to produce var ious ou tput s i gna l s wh i ch are then f ed a s i nput s to o t h e r ca r d s . Tabl e VIII i nd i ca t es t h e types o f ou tpu t s i gna l s p roduced b y the S P ca r d and wh i ch oth e r c a r d s a r e f ed b y each s i g nal .

The comb i ned pola r i z i ng ( CP ) card produces vol tages, VAs + 0 . 3 VAal, V8c + 0 . 3 Vsc1 and VcA + 0 . 3 VeAl by algebr a i c s umma t ions o f VAs' V8c, and VcA· These vol tages a r e then f i l t e r ed i n a c t i ve bandpa s s f i l t e r s w i th na t u r a l f r equ enc i e s ( fo ) equal t o the s y s t em f r equency . The t h r ee f i l t e r ed vol tages a r e fed to the CL c a r d a s pol a r i z i ng qua n t i t i e s .

The ope r a t e s i gna l ( OS ) card f i l t e r s i t s i nput s i gna l s f rom t h e S P ca r d i n act i v e bandpas s f i l t e r s w i t h na t u r a l f r equenc i e s equ a l to s y s t em f r equency . Ci r c u i t r y is a l so p r o v i ded to bypa s s t h i s f i l t e r i ng for ( IZ -TV ) s i gna l s o f l a r ge mag n i tudes . The outpu t s o f the OS ca rd a r e f ed to the ( CL ) card a s ope r a t ing s i g n a l s .

Each phas e of the CL card has t h r ee i npu t s i gna l s and p roduc e s a h i gh log i c ( + 15 vol t s DC ) ou tput s i gnal whenever these s i gna l s have the p rope r i n s tan taneou s pha se r e l a t ionsh ip . Tabl e IX s hows t h e va r ious i npu t s i gna l s f o r phase AB and whe r e the s i gna l s a r e obt a i ned . In o r d e r for the outpu t of CL to be h i g h, i npu t s 1 and 3 mu s t have the same pola r i t y and i nput 2 mu s t have an oppo s i te pol a r i t y .

INPUT NO.

1 2 3

TABLE IX

INPUTS TO CL CARD

INPUT SIGNAL

Quadrature Polarizing Operate Signal (IA - Is)ZRl

DERIVED FROM

QP Card OS Card SP Card

The CL ca r d output s a r e fed to the i n t eg r a t i ng t ime r ( IT ) ca r d wh i ch mea s u r e the t ime that each CL outpu t s i g nal i s h i gh . I f the i nput s i gnal to the IT card is h i gh for 4 . 1 6 m i l l i s econds ( 5 0 h e r t z r e lays - 5 . 0 m i l l i s econds ) on a repe t i t i ve bas i s ( or 5 . 5 m i l l i s e conds ( 5 0 he r t z r el ay s - 6 . 6 m i l l i seconds ) on a s i ngl e s hot ba s i s ) , t h e ou tpu t of the I T card w i l l g o to a h i gh log i c va lue wh i ch p i c k s up a re e d r el ay ( Kl ) mounted on the powe r supply ( PS ) ca r d . A norma l l y ope n con t a c t on Kl ene r g i z e s a telephone r e l a y ( K 2 ) moun t e d on the f ront pa ne l . Two no rma l l y open contac t s of K 2 are conne c t ed i n s e r i es w i t h the co i l s o f t a r g e t s t o prov ide the ma i n t r i pp i ng con t a c t s ( 1 1 t hrough 1 4 and 18 ) . In add i t ion, a th i rd no rma l l y open con t a c t of K2 i s connec t ed between t e rm i na l s 19 and 9 w i tho u t a t a r g e t for aux i l i a r y f unct ions .

The i npu t DC con t rol powe r ( 48, 1 1 0, o r 1 25 vol t s ) i s connec t ed to the pow e r suppl y ( PS ) card wh i ch conta i ns a DC- to-DC conve r t e r . The ou tputs o f the DC- to-DC conve r t e r a r e ± 15 vol t s DC r eg u l a t ed wh i ch s upply the neces s a r y cont rol power to the o t h e r c a r d s . The t r a n s forme r in the DC- to-DC conve r te r prov i de s i solat ion between t h e

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sol i d s ta te c i r cu i t r y of the r e lay and the i nput DC con t rol powe r ( i . e . , s t a t ion ba t t e r y) . A yel low LED mon i tor s the ou tpu t vo l tage

from t h i s i n t e r nal power supply .

Type SLY8 lB has an add i t ional MOB funct ion wh i ch de t e c t s an out­of- s t ep cond i t ion and ope r a t e s a norma l ly open ou tpu t con tac t . The c i r cu i t r y fo r t h i s funct ion is located on the SP card .

The i n t e r na l connect ions and card layout s fo r each pr i nt e d c i r cu i t ca r d a r e l i s t ed i n Table X . The p r i n t ed c i r cu i t c a r ds have t e s t poi n t s acce s s ible from the front of the ca r d s . Each t e s t po i n t, except the r efer ence connect ion "OV" on the PS card and AIN, BIN, and CIN on the IT ca r d, is buffe r ed by a r e s i s tor to p r event a d i s tu rbance to the c i r cu i t r y if a t e s t poi nt i s acc i dent a l l y s ho r t c i r c u i t ed . The t e s t po i n t s a r e labeled funct iona l ly; i . e . t he AB pha s e i nput to the i n t eg r a t i ng t ime r i s labe l ed "AIN" . The i n t e r na l connect ion dr awings show the t e s t po i n t s w i th the same labe l .

TABLE X

INTERNAL CONNECTIONS FOR CARDS

FIGURE NUMBER FIGURE NUMBER CARD DESIGNATION CARD FUNCTION OF INTERNAL OF CARD LAYOUT

CONNECTIONS

SP Signal Processing 12A 12B (Type SLY81A)

SP Signal Processing 13A 13B (Type SLY81B)

CP Combined Polarizing 14A & 14B 14C

OS Operate Signal 15A & 15B 15C

CL Coincidence Logic 16A 16B

IT Integrating Timer 17A 178

PS Power Supply 18A 188 (110-125 Volts DC)

PS Power Supply 19A 198 (48 Volts DC

CALCULATIONS OF SETTINGS

Assume that the l i ne to be protected i s approx ima t e l y 7 0 m i l e s long and has p r ima r y impedances as fol lows:

Z l = 42L8 3°,

As sume CT r a t io i s 1 0 0 0/5 and PT r a t ion i s 2 0 0 0/l .

1000 1 Z1 = 42( -- ) (--) = 4.2 L83° 5 2000

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F I RST ZONE RELAY SETT I NG

The f i r s t zone r elay can be s e t up to 9 0 % of the l i ne i mpedance for pos i t i ve s equence impedance angles above 75° and 85 % f o r pos i t i ve s equence impedance angl e s above 7 0° . For l i ne ang l es lowe r t ha n 7 0°, r e f e r to the local GE s ales of f i ce . Hence the r each ZR = 0 . 9 ( 4 . 2 ) = 3 . 78 ohms .

( a ) Select ZR1 ( ba s e r each tap ) . The h i ghes t tap s hou l d be s e l ec t e d that is l e s s than ZR, wh i ch, in t h i s case, i s the t h r ee ohm tap on the long r each r e l a y .

( b ) Select Res t r a i n t Se t t i ng ( 1 0 % to 1 0 0 % ) . s e t t i ng then i s obt a i ned f rom the formula:

The r e s t r a i n t

ZR1 3.0 T = -(100%) = -- (100) = 79% ZR 3.78

NOTE: See the CONSTRUCTION sect ion of t h i s book for d e ta i l s o n how to obt a i n the ba se r each t a p a n d r e s t r a i n t s e t t i ng c a l cu l a t ed i n t h i s sect ion .

SECOND ZONE RELAY SETTI NG

The s e cond zone r e lay i s set i n the same ma nne r a s the f i r s t zone r e l ay e xcept that a d i f fe r ent r each is r equ i r ed . A s s ume tha t the s e cond zone uni t i s u s ed in a d i r e c t iona l compa r i son s cheme a nd a r each o f 1 7 5 % i s d e s i red, ZR = 1 . 75 ( 4 . 2 ) = 7 . 35 ohms .

( a ) Se l e c t ZRl• Use thr ee ohm bas e tap .

( b ) Re s t ra i n t Set t i ng

ZR1 3 -(100) = --(100) = 40.8% ZR 7.35

MOB SETTI NG ( TYPE SLY81B ONLY )

The r e a r e two s e t t i ngs to be make i n es tabl i s h i ng a p r ope r out­o f - s t ep block i ng funct ion . These s e t t ings are i n t e r r e l a t ed and w i l l norma l l y be ba sed on sys tem load f low and powe r s w i ng s t ud i e s . The MOB cha ra c te r i s t i c shou ld be set much l a r g e r than the t r i pp i ng c h a r a c t e r i s t i c, i . e . , s h o r t e r p i c k u p s e t t i n g o n t h e M O B cha r a c t e r i s t i c t ime r, t o pe rmi t t h e swi ng impedance t o s tay between the MOB and the t r i pp i ng cha rac t e r i s t i c for the max imum t ime . On the o t h e r hand, the MOB shou ld not ope r a t e on the max i mum load f low over the l i ne, othe r w i s e t r ipp i ng on a subsequent fau l t w i l l be blocked .

The t ime r that d e t e rmi nes the durat ion i s i n s i d e t h e MOB cha r a c t e r i s t i c b u t cha ra c t e r i s t i c shou ld b e s e t as sho r t as f a s t e s t swi ngs, and as long a s pos s ible

14

that the s w i ng impedance o u t s i d e t h e t r i pp i n g pos s ib l e to d e t e c t t h e

to p r even t t h e MOB f rom

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ope r a t i ng on a fau l t . An appropr iate se t t i ng i s usua l l y between two and fou r cyc l e s p i ckup t ime . The se t t i ng s a r e made by pot ent i ome t e r s o n the SP c a r d . An "OSB" plug a r rangemen t i s provi ded o n the SP ca r d . When th i s plug i s i n the "IN" pos i t ion, the ma i n o u tput con t a c t s a r e b locked f rom t r ipp i ng du r i ng the ou t -o f - s t ep cond i t ion . When the p l ug i s i n the "OUT" pos i t ion, the ma i n ou tpu t con t ac t s a r e not blocked so that a n ou t -of-s tep cond i t ion me r e ly c lo s e s a r eed r e lay contact between s tuds 7 and 8 .

CONSTRUCTION

The type SLY81 r e lay i s assembled i n a deep, l a r g e s i z e, doubl e­end ( L 2 D) d r awou t case hav i ng s tuds a t bot h ends i n the r e a r for e x t e r na l connec t ions . The elect r i ca l connect ions between the r e lay u n i t and the case s t uds are made through s t a t iona ry molded i nne r and ou t e r bloc k s be tween wh i ch nes t s a r emovabl e connec t i ng plug wh i ch compl e t e s the c i r cu i t s . The ou t e r bloc k s at tached to the case have the s tuds for the e x t e r na l connect ions, and the i nner bloc k s have the t e rm i na l s for the i n t e r na l connect ions .

Eve r y c i r cu i t i n the d r awout case has an aux i l i a r y b r u s h, a s s hown i n F i g u r e 2 0, t o prov ide adequate ove r l ap when t h e conne c t i ng pl ug i s w i t hdr awn o r i ns e r ted . Some c i r cu i t s a r e equ ipped w i th s ho r t i ng ba r s ( see i nt e r na l connect ions i n F i g u r e 2) and on these c i r cu i t s, it is e spec i a l l y impor tant that the aux i l i a r y b r ush ma k e con t a c t a s i nd i ca ted i n F i g u r e 20 w i th adequate p r e s s u r e t o p r ev e n t t he ope n i ng of impo r tant i n te r lock i ng c i r cu i t s .

The r e lay i s mounted i n a steel f r amewo r k cal led the c r ad l e and i s a complete u n i t w i th all leads t e r m i nat ed a t the i nne r block s . Th i s c r ad l e i s held f i rmly i n the case wi th a latch a t bot h top a nd bot tom and by a g u i de p i n at the back of the case . The conne c t i ng p l ug, b e s i d e s m a k i ng t h e e l e c t r i ca l conn e c t i o n s b e t w e e n t h e r e spect ive bloc k s o f the c r adle and case, a l so loc k s the l a t ch i n place . The cover, wh i ch i s drawn to the case by t humb s c r ews, ho l d s the connect i ng p l u g s i n place . The t a r g e t r es e t mecha n i sm i s a pa r t o f the cover a s s embly .

The relay case i s s u i t able for e i the r sem i f lush o r s u r face mou n t i ng on a ll pane l s up to two i nches t h i c k and app rop r i a t e ha r dwa r e i s ava i lable . Howeve r, panel t h i c k n e s s mus t b e i n d i ca t ed on the r e lay order to ensu r e that prope r ha r dwa r e w i l l be i n cluded . Out l i ne and panel d r i l l i ng i s shown i n F i g u r e '22 . Fo r DC s upply vol tages g r ea t e r t han 1 25 vol t s it is nec e s s a r y to u s e an e x te r na l p r e - r eg u l a to r . The pre- r egu lator i s packaged i n a box made f rom compou nd p l a t e s and pe r forated steel s i d i ng . It can be mou n t e d on the r ea r of the r elay or at a conven i e n t loca t ion nea r the r elay . The ou t l i ne and mount i ng d imens ions for the p r e - r eg u l a to r a r e s hown i n F i g u r e 3 0 .

A sepa r a t e t es t i ng plug can be i n s e r t ed i n p l a c e o f t h e conne c t i ng plug t o t e s t t h e r e lay i n place o n t h e panel e i t h e r f rom i t s own sour c e of cu r r ent and vol tage, or f rom other sou r ce s . The r e lay can be d r awn ou t and r eplaced by anothe r which has been t e s t e d i n the l abo r a to r y .

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The poten t i al t ransforme r s ( TA, TB, and TC ) and the t ra n s a c to r s ( XA, XB, and XC ) a r e mounted a t the r e a r o f the c r adle a s s hown i n F i g u r e 5 . The tap block be low the t ransacto r s i s used to s e t the ba s e r each to the value d e t e rm i ned in the CALCULATION OF SETTINGS s e c t ion o f t h i s book . The three leads tagged, A, B, and C s hou l d be connec t ed to the d e s i r ed ohm i c va l u e lab e l ed ¢A, ¢B, a n d ¢C r e spec t i ve l y . FOR EXAMPLE, F i g u r e 5 shows a ba s e r each ( ZRI ) s e t t i ng of 3 . 0 ohms and the leads a r e connected as fol lows:

l ead C ------+

l ead B ------+

l ead A ------+-

pos i t ion l pos i t ion 4 pos i t ion 7

A ba s e tap i nd i ca to r i s prov i ded on the namepl a t e . The k nob should be rotated unt i l the numbe r cor r espond i ng to the ba s e r ea ch s e t t i ng i s expos ed .

F i g u r e 2 3 shows a f ront v i ew of the r e lay w i t h the namepl a t e r emoved . Th i s v i ew shows the t a r g e t s, the t e l ephone r elay a n d a l l adju s tmen t s other than the ba se r each tap desc r ibed above .

The d i a l o f the r e s t r a i n t s e t t i ng po t e n t i ome t e r ( T ) i s c a l i b r a t ed d i r e c t l y i n pe r cent wi th the numbe r i n t h e w i ndow i nd i ca t i ng the lO's d i g i t and the two d i g i t s on the d i a l i nd i ca t i ng the u n i t s and dec ima l d i g i t s . An example i s shown i n F i g u r e 7 w i t h a s e t t i ng of 8 4 % . The d i a l can be adjus t ed f rom 1 0 % to 1 1 0 % . The lock mu s t be d i s e ngaged ( by t u r n i ng the l ever cou n t e rc lockw i s e ) in o r d e r t o cha nge t h e r e s t r a i nt s et t i ng b u t shou l d be engaged aga i n a f t e r t h e des i r ed s et t i ng i s made .

Th e o t h e r adju s tme n t s i n d i ca t e d i n F i g u r e 2 3 a r e t r i m pot e n t i ome t e r s loca ted on p r i nted c i r c u i t ca r ds . Mos t o f t h e s e adju s tme n t s a r e s et i n t h e factory and shou ld not norma l l y r equ i r e r eadjus tme n t . See the ACCEPTANCE TESTS sect ion of th i s book fo r the r ecommended p rocedu r e s i f adjus tment is r equ i red .

RECEIVING, HANDLING, AND STORAGE

The s e r e lays, when not included as a pa r t of a cont rol pa ne l, w i l l be s h i pped in car tons des i gned to protect them aga i n s t damage . Immed i a t e l y upon r ece ipt of a r e l ay, exam i ne i t for any damage s u s t a i ned in t r an s i t . If i nju r y o r damage r esu l t i ng f rom r ough h and l i ng i s e v i de n t, f i l e a dama ge c l a i m at once w i t h t h e t r anspo r ta t i on company and prompt ly no t i f y t h e nea r e s t G e n e r a l E l ec t r i c Sa l e s Of f i ce .

Reasonable ca r e shou ld be exe r c i sed i n unpack i ng the r e lay i n o r d e r that none o f the pa r t s a r e i nju r ed o r t h e a dju s tm e n t s d i s t u rbed .

I f the r e lays a r e not to be i ns ta l l ed immed i a t ely, they s hou l d be s to r ed in the i r o r i g i na l car tons in a place that i s f r ee f rom mo i s t u r e, dus t a nd met a l l i c chips . For e i g n ma t t e r col l e c t ed on the ou t s i d e o f the case may f i nd i t s way i ns ide when the cove r i s r emoved and cau s e t rouble i n the ope r a t ion of the r e l a y .

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ACCEPTANCE TESTS

I mmed i a t e ly upon r e c e i pt ACCEPTANCE TEST shou ld be made s u s ta i ned in s hi pment and that d i s t u rbed .

of the r e l a y a n I NSPECT I ON AND to make sure that no damage ha s be e n t h e r e lay ca l ib r a t ions have not been

The se t e s t s may be pe r formed as pa r t of the i ns ta l lat ion or acceptance t e s t a t the d i s c r e t ion of the u s e r .

S i nce ope r a t i ng compa n i e s use many d i f f e r ent procedu r e s for acceptance and i n s t a l l a t ion t e s t s, the fol low i ng sect ion i ncludes app l i cable tes ts that may be pe r formed on these r e lays .

VISUAL I NSPECT ION

Check the nameplate s tamp i ng to make s u r e that the mode l numbe r a nd r a t i ng of the r e lay agree w i t h the r equ i s i t ion .

Remove the r e l ay f rom i t s case and check that the r e a r e no b roken o r c racked molded pa r t s o r other s i gns of phy s i ca l damage, and t ha t a l l s c r ews a r e t ight .

MECHANI CAL I NSPECT I ON

C r ad l e and Ca s e Block s

Check that the f i nge r s on the c r adle and the case ag r ee w i t h the i n t e r na l conne ct ion d i a g r am . Check that the shor t i ng ba r s are in t he cor r e c t pos i t ion . Check that each f i ng e r w i t h a s ho r t i ng bar ma k e s cont a c t w i t h t h e shor t i ng ba r . De f lect each contact f i ng e r t o ensu r e that t he r e i s su f f i c i ent contact fo rce ava i l ab l e . Check that each aux i l i a ry brush is bent h i gh enough to contact the connect ion plug .

H i -Se i sm i c Ta rget Un i t

The t a r g e t u n i t has an ope rat i ng co i l tapped a t 0 . 6 and 2 . 0 ampe r e s . The r e lay i s s h ipped f rom the factory w i t h the tap s c r ew i n the h i ghe r ampe r e pos i t ion . The tap s c r ew i s the s c r ew hol d i ng the right hand tap plate. To change the tap s e t t i ng, f i r s t r emove one s c r ew f rom the l e f t hand plate and place i t in the des i r ed tap . Nex t r emove the s c r ew f rom the undes i r ed tap and p lace i t on the l e f t hand p l a t e whe r e the f i r s t s c r ew was r emoved . See F i g u r e 2 3 . Scr ews s hou l d never be l e f t i n both taps at the same t ime .

TABLE X I

TARGET P I CKUP CURRENTS

TAP PICKUP CURRENT

0.6

2.0

17

IN AMPERES

0.35 - 0.6

1.15 - 2.0

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The back i n g s t r ip shou ld be so formed that the for ked e nd ( f ron t ) bea r s aga i ns t the molded s t r ip unde r the a rmatu r e . S i nce mechan i ca l adju s tment s may a f fect the Sei sm i c Frag i l i ty Level, i t i s a dv i s ed that no mecha n i ca l adjus tmen t s be made i f s e i sm i c capab i l i ty i s o f conce r n .

Tel ephone Relay

W i t h t e lephone r e lays i n the de-ene r g i z ed pos i t ion a l l c i r cu i t c los i ng cont a c t s s hou ld have a gap of a t l ea s t 0 . 0 1 5 i nch and a l l c i r c u i t ope n i ng contac t s have a w i pe o f at l e a s t 0 . 0 0 5 i nch . Gap may be checked by i ns e r t i ng a f e e l e r gage between the con t ac t s and w i pe can be checked by obs e rv i ng the amount o f d e f l e c t i o n o n t h e s t a t iona r y con tact befor e pa r t i ng the contact s . The a rma t u r e s hou l d then be ope r a t ed by hand and the gap and wipe aga i n checked a s d e s c r i bed above .

E l e c t r i ca l Tes t, Gener a l

Al l a l t e r na t i ng cu r r e n t ope r a ted dev i c e s a r e a f f e c t ed b y f r equency . S i nce non-s i nuso i dal waveforms can be a na l y z ed a s a f u ndame n t a l p lus ha rmon i cs o f the fundamental f r equency, i t fol lows that a l t e r na t i ng cu r r en t dev i c e s ( r e lays ) w i l l be a f f e c t ed by the appl i ed waveform . The r e fo r e, i n orde r to prope r ly t e s t a l t e r na t i ng cu r r en t r elays i t i s e s s e n t i a l to use a s i ne wave sou r ce o f cu r r en t o r vol t age .

D i e l e c t r i c Tes t s

1 . In t r oduct ion

The s u r g e capa c i to r s ( Cl -C9 and Cl 5-C2 0 ) used in the r e l ay do not have vol tage r a t i ngs to wi ths tand AC hi pot the r e fo r e, caut ion mus t be exe r c i sed when h i po t t i ng to avo i d t h e s e capac i to r s .

t ype SLY vol t a g e; dama g i ng

It i s r ecommended tha t hipot t es t s be pe rformed on a bench w i t h the r e lay i n i t s cas e . If the r e l a y i s to be h i pot t e s t ed tog e t h e r w i t h o t he r appa r a t us i n a n equ i pment, a l l e x t e r na l conne c t ions to Te rmi nal 1 0 ( su r ge g round ) mu s t be r emoved .

The h i pot t e s t vol tage shou ld be 1 5 0 0 vol t s rms, 5 0 o r 6 0 he r t z for new r e lays o r 1 1 2 5 vol t s rms, 5 0 o r 6 0 he r t z for o t h e r r e lays . New r e lays a r e de f i ned as those wh i ch have not been i n s e r v i ce, wh i ch a r e not mo r e than one year old f rom the date o f s h i pment, and whi ch have been s u i tably s to r ed to p r event deter iorat ion . The d u r a t ion o f app l i ca t ion o f the t e s t vol tage for both o l d and new r e lays s hou l d b y 6 0 s e conds .

2 . Hipot Te s t s

( a ) Common Mode H i pot Te s t s ( Al l t e rmina l s t o ca s e ) :

Tempo r a r y connect ions shou ld be made to t i e a l l r e l ay t e rm i na l s, i nc l ud i ng Termi nal 1 0, togethe r . H i pot vol tage can then be appl i ed between t h i s common connect ion and the r e l a y ca s e .

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( b ) Transve r s e Mode H ipot Te s t s ( Be tween c i r cu i t s ) :

For h i pot t e s t s between c i r cu i t s o f the r e lay, the s u r g e capac i to r s mu s t b e tempor a r i l y d i s conne c t e d f rom t h e s u r g e capac i to r bu s e s i n s i de the r e lay . The r e lay te rmi na l s s hou l d be jumped to p rov ide the fou r g roups of c i r cu i t s shown in Tab l e X I I . H i pot vol tage can then be appl i ed between any two g roups o f c i r cu i t s .

TABLE X I I

C I RCU I T GROUP I NG FOR TRANSVERSE MODE HI POT TESTS

CIRCUIT GROUP JUMPER BETWEEN TERMINAL NUMBERS

AC Current 1, 2, 3, 4, 5, and 6

AC Potential 15, 16 and 17

DC Control Power 9, 19 and 20

Output Contacts 7, 8, 11, 12, 13, 14 and 18

An a l t e r na t e t e s t u s i ng a 5 0 0 vol t DC meg g e r can be pe r formed be tween the c i r cu i t g roups of Table X I I wi t h the s u r g e capac i to r s connec ted i n the i r no rma l manne r . Wh i l e t h i s me t hod doe s not t e s t the r e lay to i t s f u l l d i elect r i c r a t i ng, i t w i l l d e t e c t some cases of deg raded i nsulat ion .

3 . Res tor i ng Re lay to Se r v i ce

Af t e r the h i pot o r megger t e s t i ng i s comp l e ted, the s u r g e capac i to r s shou ld b e r econnected t o t h e s u r g e capac i tor bu s e s a n d a l l e x t e r na l wi r i ng t o Te rmi nal 1 0 shou l d be r econnec ted . The r each t e s t s des c r i bed unde r the ACCEPTANCE TESTS sect ion of t h i s book s hou l d then be r epeated .

De t a i l ed Te s t i ng I n s t r u c t ions

l . Requ i r ed Se t t i ngs

Mak e c e r t a i n a l l the r elay set t i ngs have been made. The se shou l d b e i n acco r dance w i th the s e t t i ng ca lcu l a t ions . The s e t t i ng s a r e:

( a ) Ba s e r each ( ZRll i s s e t on the tap block at r ea r of r e lay . Al l t h r ee phase s e t t ings shou ld be the same .

( b ) P e r cent r e s t r a i n t ( T ) i s set on the p r e c i s ion pot e n t iome t e r o n t h e f ron t o f t h e r e lay .

2 . Re lay Base Reach Angle and Reach Check

The fol low i ng p rocedu r e is r ecommended to check the ba s e r each ang l e (�) and the r e lay r each s e t t i ng ( ZR) ·

( a ) P lace the "OSB" plug i n the "OUT" pos i t ion ( fo r Type SLY8 1B onl y ) .

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tt

GEK-49861

(b) Make the test connections shown in Figure 31 for the particular phase being tested. (The test connection shown in Figure 24 may also be used. )

(c) Adjust the load box until the ammeter indicates the desired test current (IT) . See Table XIII for the recommended test current for a desired reach.

TABLE XIII

RECOMMENDED TEST CURRENT

5 AMPERE RATED RELAY 1 AMPERE RATED RELAY

RECOMMENDED RECOMMENDED BASE REACH TAP MINIMUM BASE REACH TAP MINIMUM

TEST CURRENT TEST CURRENT

0.1 20tt 0.5 4tt 0.2 20tt 1.0 4tt 0.4 10tt 2.0 2 0.75 8 3.75 1.6 1.5 4 7.5 0.8 3 2 15.0 0.4

(d) Adjust the phase angle for the nominal base reach angle of 85° .

(e) Observe the waveform at the following test point (on OS card) with an oscilloscope.

1) "AOUT" for phase pair A-B 2) "BOUT" for phase pair B-C 3) "COOT" for phase pair C-A

(f) Lower the voltage V to the value given in equation (2) below:

where

100 VT =2Xl X Z X -T Rl T test current in amperes RMS restraint voltage setting in percent pickup voltage at the base reach angle in volts RMS base reach tap in ohms

(2)

tt VT should not be greater than 110% of rated voltage. If VT is greater, reduce IT until VT is correct.

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(g) As the voltage is lowered, observe the waveform at the test point designated in step e) . At the point where the telephone relay (K2) picks up, a slight adjustment of the phase angle and input voltage will cause the waveform to be reduced to a null consisting of only third and fifth harmonics. At this null point, the angle on the phase angle meter is the base reach angle 0 and should be within 2° of the nominal value of 85°. The voltage VT at this null condition should be within 5% of the value calculated by equation {1) .

NOTE: The measured pickup should agree with the calculated value within ±5%. If the values do not agree within these limits, it is recommended that the test setup and meter calibrations be checked before the factory settings on the relay are disturbed. One good method of checking the test set up and procedure is to repeat the tests on a duplicate relay.

{h) If it is desired to readjust the reach so that measured pickup occurs at a value closer to the calculated value, this may be accomplished by means of the trim potentiometers on the SP card. The potentiometer to be adjusted for each phase is shown in Table XIV. These potentiometers should be turned clockwise to increase the reach.

TABLE XIV

REACH ADJUSTMENT LOCATIONS

PHASE UNDER TEST POTENTIOMETER DESIGNATION

AB

BC

CA

Pl

P3

P5

{ i) Replace the "OSB" plug in the "IN" position if blocking of main output contacts is desired during an out-of-step condition (Type SLY81B only) .

3. Testing Mho Characteristics

The complete mho characteristic can be measured by the test circuit shown in Figure 31. (Note: The test circuit shown in Figure 24 may also be used for measuring the complete mho characteristic, but, if this circuit is used, the test results may indicate that the characteristic pulls back at some angles. This pull back is due to an inadequate amount of positive-sequence polarizing voltage being produced by this circuit.) The procedure is similar except that the phase shifter is adjusted until the phase angle meter indicates the angle of interest. Reduce the voltage out of the variac until the relay picks up and the value of VT at this point should be as given by equation {3) .

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tt

where

GEK-49861

100 V = 2 X IT X ZR X -cos ( oc - flf) T 1 T oc = angle read by phase angle meter in degrees � = 85° = relay base reach angle in degrees

All other parameters are as defined under equation (2) .

(3)

Recommended angles for testing are 55° and 115° at which angles equation (2) reduces to: tt

where:

(4) tt VT(30) = test voltage at ±30° from angle of maximum

reach

tt VT should not be greater than 110% of rated voltage. If VT is greater, reduce IT until VT is correct.

Note: If IT is not at least three times the value of the Overcurrent Supervision setting, a distorted Mho Characteristic may be measured.

4 . Alternate Test Method for Reach Tests

An alternate method of testing the relay characteristic is shown in Figure 25 where the R-X test combination is employed. The circuit uses the test box (102L201) , test reactor (6054975) and test resistor (6158546) described in GEI-44236. Since a limited number of resistor-reactor fault impedances are available, only a few points on the relay characteristic can be checked.

s. Integrating Timer Tests

The integrating timer (IT) card has three adjustments as indicated in Table XV.

TABLE XV

POTENTIOMETER POTENTIOMETER 60 HZ RELAY 50 HZ RELAY DESIGNATION LOCATION FUNCTION FACTORY SETIING FACTORY SETTING

MILLISECONDS MILLISECONDS

Pl Bottom Transient 5.5 6.6 Pickup Time

P2 Top Steady State 4.16 5.0 Pickup Time

P3 Middle Dropout Time 5 6

These potentiometers have been factory set and should not be adjusted unless a plot of the mho characteristics indicates an improper pickup time setting. The timer has a 5. 5, 4/5 (50 hertz -6.6, 5/6) time setting. The Pl potentiometer, used for transient

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operation, has been set in co-ordination with the P2 potentiometer at the factory and sealed. Potentiometer Pl must not be readjusted. Potentiometer P2 is set for a 4. 16 millisecond (50 hertz 5. 0 milliseconds) pickup time. The 4. 16 millisecond (50 hertz character is tic; times longer that 4. 16 milliseconds (50 hertz - 5. 0 milliseconds) tend to narrow the characteristic and times shorter than 4. 16 milliseconds (50 hertz - 5. 0 milliseconds) tend to widen the character is tic. Turning the P2 potentiometer clockwise will increase the pickup time delay. Potentiometer P3 is set for a five millisecond (50 hertz 6. 0 milliseconds) dropout time delay. Turning the P3 potentiometer clockwise will increase the dropout time delay.

The test circuit of Figure 31 may be used to check the steady state pickup time setting. (The same results will be obtained if the test circuit of Figure 24 is used in place of the test circuit of Figure 31. ) A dual trace oscilloscope should be used with channel "A" connected to test point "AIN" on the IT card and channel "B" on test point "OUT" on the IT card. Connect unused inputs "AIN", "BIN", or "CIN" on IT card to "OV" test point on PS card. In order to observe the pickup time delay, the dropout time delay must be reduced by turning P3 counterclockwise so that the output resets each half cycle. Reduce "VT" until the relay picks up and the output (channel B) should go positive 4. 16 milliseconds (50 hertz - 5. 0 milliseconds) after the input (channel A) goes positive. After the pickup time is checked, P3 should then be turned clockwise until the output (channel B) produces a continuous positive signal. P3 should then be turned clockwise for one additional turn.

As a final check on the accuracy of the 4. 16 milliseconds, (50 hertz - 5. 0 milliseconds) the mho characteristic may be rechecked and compared with the desired characteristic.

To check the transient pickup time setting, the following procedure should be used:

(a) Remove the CL card

(b) Connect the test circuit of Figure 26

(c) With the oscilloscope trigger on positive slope, open the normally closed contact. The Channel Two trace should step positive 5. 5 milliseconds (50 hertz - 6. 6 milliseconds) (±0. 1 millisecond) after the Channel One trace steps positive.

6 . Overcurrent Supervision Tests

There are potentiometers on the SP card for adjustment of the sensitivity of the overcurrent supervision signal for each phase pair as shown in table XVI.

The test circuit for setting sensitivity of the overcurrent superv1s1on signal is shown in Figure 24 (or Figure 31) . The recommended procedure for setting sensitivity is as follows:

a) Make connections for phase pair AB and adjust current IT to the desired value of current supervision (between maximum load current and minimum fault current) . Set the phase shifter for a phase angle meter reading at 85° .

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TABLE XVI

OVERCURRENT SUPERVISION ADJUSTMENT

POTENTIOMETER DESIGNATION ADJUSTMENT FOR PHASE PAIR

P2

P4

P6

AB

BC

CA

b) Reduce voltage VT until continuity tester indicates that the main output contacts are closed. Reduce VT to approximately 80% of this voltage and maintain at this value.

c) Turn potentiometer P2 clockwise until the continuity tester indicates that the main output contacts are open.

d) Alternately raise and lower current IT slightl:f and check that output contacts are open for values of IT sl1ghtly less, and closed for values of IT slightly more, than the desired sensi ti vi ty setting. {The output contacts should be closed for values that are 10% higher than the desired sensitivity setting) .

e) Change connections to phase pair BC and repeat steps a) through d) except use potentiometer P4 for adjustment.

f)

Note:

Change connections to phase pair CA and repeat steps a) through d) except use potentiometer P6 for adjustment.

In order to set the sensitivity of the overcurrent supervision to a value near the low end of the setting range given in Table IV, it may be necessary to change the relay restraint setting to a very low value. If the test circuit shown in Figure 31 is used in place of the one shown in Figure 24, this change in the relay restraint setting will not be necessary.

7. MOB Tests (Type SLY81B only)

There are two timer adjustments on the "SP" card for setting the MOB function. These adjustments are listed in Table XVII.

TABLE XVII MOB FUNCTION ADJUSTMENT

POTENTIOMETER TIMER ADJUSTMENT 60 HZ RELAY SO HZ RELAY

DESIGNATION FUNCTION RANGE FACTORY SETTING FACTORY SETTING

(MILLISECONDS) MILLISECONDS MILLISECONDS

P7 Characteristic 2 - s 3 3.6

P8 Duration 33 - 67 so 60

The test circuit for checking either of these timer settings is shown in Figure 27. The recommended procedure for checking the "CHARACTERISTIC TIMER" is as follows:

a) Connect Channel One of the oscilloscope to test point "BIN" on the "IT" card. Trigger the oscilloscope from this channel with positive slope.

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b) Set current IT at the value shown in Table XIII and adjust the phase shifter until the phase angles meter reads approximately 75° .

c) Close switch Sl and slowly reduce voltage VT until Channel Two of the oscilloscope goes low and measure the width of the timer input blocks on Channel One for this condition. This time is the setting of the "CHARACTERISTIC TIMER", and it can be increased by turning potentiometer P7 clockwise.

In order to check the "DURATION TIMER" setting, the following procedure is recommended:

a} Change Channel One of the oscilloscope from test point "BIN" on the "IT" card to the test point "MOB" on the "SP" card. Leave the trigger on this channel with positive slope.

b) Close switch Sl and slowly reduce voltage VT until Channel Two goes low. Alternately raise and lower VT and observe the time delay before Channel Two goes low. This time delay is the setting of the "DURATION TIMER" which can be increased by turning potentiometer P8 clockwise.

The logic of the MOB function can then be checked by lowering voltage VT until the continuity tester indicates that the main output contacts are closed. Reduce VT to approximately 80% of this voltage and open switch Sl. Close switch Sl and observe that Channel Two of the oscilloscope does not go low at any time.

INSTALLATION PROCEDURE

INTRODUCTION

The relay should be mounted on a vertical surface. The outline and panel drilling diagram is shown in Figure 22.

The location should be clean, dry, free from dust or excessive vibration and well lighted to facilitate inspection and testing.

The internal connection diagrams for the relays are shown in Figures 2 and 3. Typical external connections are shown in Figure 4.

SURGE GROUND AND RELAY CASE GROUND CONNECTIONS

One of the mounting studs or screws should be permanently connected to ground by a conductor not less than No. 12 AWG gage copper wire or its equivalent. This connection is made to ground the relay case. In addition, Terminal 10 designated as "surge ground" on the internal connections diagram must be tied to ground for the surge suppression networks in the relay to perform properly. This surge ground lead should be as short as possible to ensure maximum protection from surges (preferably ten inches or less to reach a solid ground connection) .

With Terminal 10 connected to ground, "surge ground" is connected electrically to the relay case. The purpose of this connection is to

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prevent high frequency transient potential differences from entering the solid state circuitry. Therefore, with Terminal 10 connected to ground the surge capacitors are connected between the input terminals and the case. When hipotting the relay, the procedure given in DIELECTRIC TESTS under the ACCEPTANCE TESTS section of this book must be followed.

TEST PLUGS

The relay may be tested without removing it from the panel by using a 12XLA13A test plug. This plug makes connections only with the relay and does not disturb any shorting bars in the case. Of course, the 12XLA12A test plug may also be used. Although this test plug allows greater testing flexibility, it also requires current transformer shorting jumpers and the exercise of greater care since connections are made to both the relay and the external circuitry. Addi tiona! information on the XLA test plugs may be obtained from instruction book GEI-25372.

INSTALLATION TESTS

Since operating companies use many different procedures for installation tests, the section under ACCEPTANCE TESTS contains all necessary tests which may be performed as part of the installation procedure at the discretion of the user.

The minimum suggested tests are as follows:

1. VISUAL INSPECTION

Repeat the i terns described under ACCEPTANCE TESTS - VISUAL INSPECTION.

2. MECHANICAL INSPECTION AND ADJUSTMENTS

Repeat the items described under ACCEPTANCE TESTS - VISUAL INSPECTION.

3. TARGET UNIT

Set the target unit tap screw in the desired position. The adjustment will not be disturbed if a screw is first transferred from the left plate to the desired tap position on the right tap plate and then removing the screw in the undesired tap and transferring it to the left plate.

4. REACH TESTS

a) Using the values selected in the CALCULATION OF SETTINGS section of this book, set:

Base reach (ZRI) on the back of the relay

Percent restraint (T) on the front panel potentiometer

b) Measure the relay reach at 85° as described in the ACCEPTANCE TESTS section of this book.

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GE K-49861

PERIODIC TESTING AND ROUTINE MAINTENANCE

In v i ew of the v i ta l r 1 l e of protec t i ve r e lays i n the ope r a t ion o f a power s y s tem i t is i mpo r tant that a pe r iod i c t e s t prog r am be fol lowed . It is r ecogni zed that the i n t e rva l between pe r i od i c chec k s w i l l va ry depend i ng upon envi ronment, type o f r e lay and t h e u s e r ' s expe r i e nce w i t h pe r iod i c t e s t i ng . Unt i l the u s e r has ac cumu l a t ed e nough expe r i ence to select the t e s t i n te rva l be s t s u i ted to h i s i nd i v i dua l r equ i r emen t s i t i s suggested that the po i n t s l i s t ed unde r INSTALLATION PROCEDURE be checked at an i n te rva l of f rom one to two yea r s .

Check the i tems de s c r ibed unde r ACCEPTANCE TESTS VISUAL INSPECTION and MECHANICAL INSPECTION . Exam i ne each component for s i gns of ove r hea t i ng, de t e r iorat ion or othe r damag e . Check that a l l connect ions a r e t i ght by obs e r v i ng tha t the lockwashe r s a r e f u l l y col l apsed .

CONTACTS

Exam i ne the contac t s for pi t s, a r c or bu r n ma r k s, co r r os ion, and i ns u la t i ng f i lms . Fo r c l ea n i ng contacts, a f l exible bu r n i s h i ng tool s hou l d be used . Th i s cons i s t s of a f l ex ib l e s t r ip of me t a l w i t h an e t ch- roughened s u r face r e sembl i ng, i n e f fect, a s upe r f i ne f i l e . The pol i s h i ng act ion is so de l i cate that no s c r a t ches a r e l e f t, y e t i t w i l l c l ean o f f any cor ros ion thoroughly and rapi d l y . I t s f le x i b i l i ty e n su r e s the c l ea n i ng of the actual po i n t s of conta ct . Do no t u s e k n i ve s, f i les, abr a s i ve pape r o r c loth o f any k i nd t o c l ea n r e l ay contact s .

CAUTION

Remove ALL powe r f r om the relay before removi ng or inse r t i ng any of the pr i nted c i r cu i t boards . Fa i lure to observe this caut ion may result i n damage to and/or mi soperat ion of the r e lay .

ELECTRICAL TESTS

The r each t e s t s descr ibed unde r the ACCEPTANCE TEST section s hou l d be r epea t ed and the r es u l t s compa r ed aga i n s t the de s i r ed s e t t i ng . If the mea s u r ed value i s s l i g h t l y d i ffe r e nt f rom that measu r ed at a p r e v ious t ime , t h i s is not neces sa r i l y an i nd i c a t ion t ha t the r e lay shou ld be r eadjus ted . The e r ro r s of a l l the t e s t equ i pme nt a r e of ten add i t ive and the tot a l e r ror o f t he p r es e n t s e t up may be of oppos i te s i g n f rom the e r ror at the prev ious pe r iod i c t es t . Ins t ead of r eadju s t i ng the r e lay i t i s recommended that, i f the appa r en t e r ror is acceptable, no adjus tme nt be made and that the e r ro r be noted on the r e l ay t e s t reco r d . Af t e r s u ff i c i e n t test data ha s accumu l a ted, it w i l l become appa r e n t whether the mea s u r ed e r ro r s i n the s e t t i ng a r e due to ra ndom va r i at ions i n the t e s t cond i t ions o r a r e due t o a one - t ime d r i f t i n the cha racte r i s t i c s o f the r e lay .

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I .

II .

G E K-49861

SERVICING

A r ecommended t roubl eshoot i ng procedu r e i s shown i n Tabl e XVIII .

PROBLEM

Power supply man i t or LED i s not on .

Relay will not pick up when i t should on any of the three phases but power supply monitor LED is on .

TABLE XVIII

TROUBLESHOOTING PROCEDURE

PROBABLE CAUSE

1 . Plus and/or minus 15 VDC missing .

2. Defecti ve LED, zener diode CR15 or resi stor R15 .

1 . Defective telephone relay (K2) or target (Tl).

2 . Defecti ve reed relay (K1) .

3. Defecti ve IT card .

28

TROUBLESHOOTING SEQUENCE

1 . Check +15V and -15V test points on PS card . If ei ther or both voltages are not between 14 and 16 volts check that rated DC voltage (48 or 125 VDC) i s on PS card pin 40 (+) to p i n 24 (-) . If not, check input terminals 19 (+) to 20 (-) .

2. Replace PS card .

1 . Remove PS card and jumper pins 17 and 40 of the PS card . If the relay does not pick up, then K2 or T 1 is defecti ve .

2 . If the relay picks up with the jumper in the preceding step (1) then remove the jumper and rei nsert PS card . Remove the CL card and the relay should pick up . If not, K1 relay is possi bly defecti ve . Change the PS card .

3. If replacing the PS card in the step (2) does not cause pickup (with the CL card still removed) the IT card i s possibly defecti ve . Change the IT card .

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PROBLEM

III. Relay will not pick up when i t should on phase BC, but picks up correctly on phases AB and CA (Type SLY81B only).

IV. Relay will not pick up when it should on one phase, but picks up correctly on another phase.

v . Out of specifi-cation in maximum reach ± 30° tests.

G E K-49861

TABLE XVIII ( Cont i nued )

TROUBLESHOOTING PROCEDURE

1 .

1.

2.

1 .

2.

PROBABLE CAUSE

110SB 11 plug SP card i n position.

on the the "IN 11

Overcurrent super-vision sensitivi ty set too hi gh.

Defective card.

Incorrect steady state pickup time on IT card.

Defective card

RENEWAL PARTS

1.

1.

2.

1.

2.

TROUBLESHOOTING SEQUENCE

Place 110SB 11 plug in the 110UP position for reach tests.

Turn sensitivity potentio-meter, on SP card for the inoperative phase (P2 for phase AB, P4 for phase BC or P6 for phase CA) fully counterclockwi se.

Change printed circui t cards, one at a time, in the following order : IT, CL, SP, CP, OS.

Set steady state pickup time pot and recheck other phases.

Change printed circui t cards, one at a time, i n the following order ; SP, CP, IT, CL, OS.

It i s r ecommended that su f f i c i en t quant i t i e s of r enewal pa r t s be ca r r i ed in s tock to enabl e the prompt r eplaceme nt of any that a r e wor n, b rok en, o r damaged .

Sho u l d a p r i nt e d c i r cu i t c a r d become i nope r a t i v e, i t i s r ecommended that t h i s ca r d be r eplaced w i t h a spa r e . A spec i a l tool ( s ee F i g u r e 2 1 ) i s ava i l able for r emov i ng the pr i nt ed c i r cu i t c a r d s f rom t he i r soc k e t s a n d t h i s tool shou ld a lways b e u sed f o r r emova l . I n mos t i ns tances, the u s e r wi l l be anx ious to r e t u r n the equ i pmen t t o s e r v i ce as soon as pos s ible and the i n s e r t ion o f a spa r e c a r d r ep r e s e n t s t h e mos t exped i t ious means o f accompl i sh i ng th i s . The f au l ty ca r d can then be r e t u r ned to the facto r y fo r r epa i r o r r ep laceme nt .

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GEK-49861

component on the card which has failed. By referring to the internal connection diagram for the card, it is possible to trace through the card circuit by signal checking and, hence determine which component has failed. This, however, may be time consuming and if the card is being checked in place in this unit, as is recommended, will extend the outage time of the equipment.

CAUTION

Great care must be taken in replacing components on the cards . Special soldering equipment suitable for use on the delicate solid-state components must be used and , even then , care must be taken not to cause thermal damage to the components , and not to damage or bridge over the printed circuit buses . The repaired area must be recoated with a suitable high di-electric plastic coating to prevent possible breakdowns across the printed circuit buses due to moisture of dust .

ADDITIONAL CAUTION

Dual in-line integrated circuits are especially difficult to remove and replace without specialized equipment . Furthermore, many of these components are used on printed circuit cards which have bus runs on both sides . These additional complications require very special soldering equipment and removal tools as well as additional skills and training which must be considered before field repairs are attempted .

When ordering renewal parts, address the nearest Sales Office of the General Electric Company, specify quantity required, name of the part wanted, and the complete model number of the relay for which the part is required.

Since the last edition, changes have been made in the ANSI reference under RATING GENERAL : in Table IV: in the Detailed Testing Instructions for Relay Base Reach Angle and Reach Check, for Testing Mho Characteristics, for Integrating Timer Tests, and for Overcurrent Supervision Tests : and in Figures 18A and 22. Other figure captions have been updated.

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I A =

Is =

I c =

IT =

T =

VAs =

Vsc =

VcA =

VAsl =

Vsc 1 =

VeAl =

VT =

Z 1 =

Z 1 L =

Z 1s =

Z 2L =

Z 2s =

ZF =

Z R =

Z Rl =

ac: =

¢ =

G E K-49861

APPENDIX I

DEFINITION OF SYMBOLS

total pha s e A cu r r ent i n r e lay i n ampe r e s rms

tot a l phas e B cu r r ent in r e lay in ampe r e s rms

tot a l phas e C cu r r ent in r e lay in ampe r e s rms

r e lay cu r r e nt du r i ng t e s t in ampe r e s rms

r e lay vol tage r e s t r a i n t s e t t i ng in pe r c e n t

pha s e A t o pha s e B vol t age i n vol t s rms

phas e B to phas e C vol tage in vol t s rms

pha s e C to phas e A vol tage in vol t s rms

pos i t i v e s equence of VAs vol tage in vol t s rms

pos i t i ve s equence of Vsc vol tage in vol t s rms

pos i t i ve s equence of VcA vol t age in vol t s rms

r e lay vol tage du r i ng t e s t in vol t s rms

s y s t em pos i t i ve s equence phase to neu t r a l impeda nce in ohm s

l i ne pos i t i ve s equence phase t o neu t r a l impedance i n ohms

sou r c e pos i t i ve s equence phase to neu t r a l impedance i n ohms

l i ne nega t ive s equence pha se to neu t r a l impedance i n ohms

sou r c e negat i ve s equence pha se to neu t r a l impedance i n ohms

s y s t em impedance between r e lay loca t ion a nd fau l t locat ion i n ohms

r e lay r each in ohms

bas e r each tap i n pos i t ive sequence ohms

phas e ang le me t e r r ead i ng du r i ng t e s t i n deg r e e s

r e lay ba s e r each ang le i n deg rees

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G E K-49861

APPENDIX II

In the event that the SLY8l ope r a t i ng t ime i s des i red f o r a spec i f i c f au l t locat ion, the average ope r a t i ng t ime can be obt a i ned f rom F i g u r e 28 . The ope r at i ng t ime can be obt a i ned f rom the appropr i a t e c u r ve by ca lculat i ng the equ i va l e n t vol tage appl i ed t o t h e ope r a t i ng c i r cu i t b y means of t h e formula ( IA - Is ) ( ZRl - T Z I F ) · The r e lay i nco r po r a t e s a f i l t e r delay for fau l t s nea r the ba lance po i n t to p r e c l ude ove r r each on CCVT t ra n s i e nt s . Hence, the p r e f a u l t e n e r g y i n the f i l t e r wi l l i n f luence the ope r a t i ng t ime on l i g h t e r f a u l t s . The uppe r curve i s appropr i a t e f o r r e s t r a i n t s e t t i ng s o f 4 0 % o r h i gher, the m i ddle cu r ve for 2 0 % r e s t r a i n t s e t t i ng, and the low e r c u r ve for 1 0 % r e s t r a i nt s e t t i ng . Speed for r e s t r a i n t s e t t i ng s b e t w e e n 1 0 % a nd 2 0 %, and 2 0 % and 4 0 % c a n b e e s t i m a t ed b y i nt e rpol a t ion .

The da ta i s plot t ed for the fol low i ng cond i t ions;

( a ) Integ r a t i ng t ime r s e t for 5 . 5, 4 . 2/5 m i l l i seconds ( 5 0 he r t z -6 . 6, 5/6 m i l l i seconds )

( b ) No load i n the r e lay pr ior to the fau l t

( c ) The sou r ce and fau l t impedance have approx ima t e l y t h e s ame impedance angle as the r e lay max imum r each .

Heavy p r e- f au l t load f low i n the r e lay can r e s u l t i n much s ho r t e r ope r a t i ng t imes for clos e - i n fau l t s, and hence these c u r ves s hou l d not b e u s ed t o e s tabl i sh a m i n imum ope r a t i ng t ime .

Exampl e

As s ume t h e ope r a t e t ime i s des i r ed for a fau l t o n t h e l i ne s hown be low for the f i r s t and second zone r e l ays at the l e f t end . Th i s examp l e i l l u s t r a t e s calculat ions for fau l t s i n the m i d d l e o f t h e l i ne and a t the two ends . The ope r a t i ng t imes are app ropr i a t e f o r one pha s e - to-pha se measu rement uni t for pha se- to-pha s e, phas e - to-phas e ­to-g r ou nd, a n d t h r ee phas e fau l t s . Howev e r, t h e ope r a t i ng t ime o n t h r e e phas e fau l t s w i l l b e s l i g h t l y f a s t e r than f o r the o t h e r t wo t ypes, s i nce a l l t h r ee uni t s a r e ope r a t i ng, and the speed w i l l be de t e r m i ned by the f a s t e s t mea s u r ement un i t of the t h r ee .

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G E K-49861

Zone l r e lay s e t t i ng =

3 0 . 9 (6) = 5 . 4 Q ; ZRl = 3 Q ; T = - = 0 . 5 6

5 . 4

Zone 2 r elay s e t t i ng =

3 1 .7 5 (6) = 1 0 . 5 Q ; ZRl = 3 Q ; T = -- = 0 .29

1 0 . 5

Fo r Fau l t a t Fl

Fo r Zone l

Fo r Zone 2 .

1 1 5 1 I� = V3 X

1 . 5 +

3 = 1 4 .75 A mps, I A - I8 = V3 (1 4 .75) = 2 5 . 5 A mps

( IA - Is ) ( ZRl - TZF ) = 25 . 5 ( 3 - 0 . 5 6 x 3 ) = 3 3 . 7 vol t s From uppe r curve , t ime = 1 4 . 0 mi l l i seconds

( IA - Is ) ( ZRl - TZF ) = 25 . 5 ( 3 - 0 . 2 9 X 3 ) = 5 4 . 3 vo l t s

Int e r pola t i ng between the uppe r and middle cu rve , Time = 1 0 . 5 mi l l i seconds

Fo r fau l t at F2

For Zone l

For Zone 2

1 1 5 1 I3� = V3 X 1.5 = 44. 3 A mps, IA - I8 = V3 (44. 3 ) = 7 6 .7 A mps

( IA - Is ) ( ZRl - TZF ) = 76 . 6 ( 3 - 0 . 56 X 0 ) = 2 3 0 vol t s From uppe r cu r ve t ime = 1 0 . 5 mi l l i seconds

( I A - Is ) ( ZRl - TZF ) = 76 . 6 ( 3 - 0 . 2 9 X 0 ) = 2 3 0 vol t s By i n t e r polat ion t ime = 1 0 . 5 mi l l i seconds

For Fau l t at F 3

Fo r Zone l For Zone 2

1 1 5 1 I� = -V-3 X -1 -_5-+-

6 = 8 . 85 A mps, IA - I8 = V3 (8 . 8 5 ) = 1 5 . 3 A mps

( ZRl - TZF ) is nega t i ve , r e lay does not ope r a t e

( IA - Is ) ( Z Rl - T ZF ) = 15 . 3 ( 3 - 0 . 2 9 X 6 ) = 19 . 3 vol t s By i n te rpolat ion , t ime = 1 6 . 0 mi l l i seconds

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F i gu r e

1 2 3 4 5 6 7 8 9A 9B l OA l O B 1 1 12A 12B 1 3A 1 3 B 1 4A 1 4B 1 4 C 15A 15B 15C 1 6A 1 6 B 1 7A 1 7 B 1 8A

1 8 B

1 8C 1 9A 1 9 B 2 0 2 1 22 2 3 2 4 25

26 2 7 2 8A

28B

29 3 0 3 1

G E K-49861

LIST OF ILLUSTRATIONS

Func t i onal Block D i a g r am . . . . . . • . . . . 35 I n t e r na l Connect i ons for Type SLY81A . • • 3 6 I n t e r nal Connec t i ons for Type SLY 8 1 B . . . . . . . • . 3 7 Ex t e r na l Connect i ons . • . . . . . . . • . 3 8 Rea r V i ew o f Long Reach Model Ou t o f Cas e . . • . . . 3 9 F ront V i ew of Relay Ou t of Case . . . . . . • . . . . 4 0 Re s t r a i nt Set t i ng D i a l ( Se t a t 8 4 % ) • . . . • . • 4 1 Measu r ement P r i nc i p l e . . . . . . • . . . • . . • . . 4 1 Ave rage Ope r a t i ng Time for F i r s t Zone Relay - 6 0 he r t z 42 Ave rage Ope r a t i ng Time for F i r s t Zone Re lay - 5 0 he r t z 42 Ave r age Ope r a t i ng T ime f o r Second Zone Relay - 6 0 he r t z 4 3 Ave rage Ope r a t i ng Time for Second Zone Relay - 5 0 her t z 4 3 Reach Ve r su s Fau l t ed Phase Vol tage . . . . . . • . . . 4 4 I n t e r na l Connect ions f o r Type SLY81A S i gnal P r oce s s i ng C a r d 45 Ca rd Layout for Type SLY81A S i gnal P r oce s s i ng Ca rd . . . • 46 I n t e r na l Connect ions for Type SLY8 1 B S i gnal P r oces s i ng Ca r d 4 7 Ca r d Layou t f o r Type SLY8 1B S i gnal P roces s i ng Card . . . • 4 7 I n t e r na l Connect ions f r o 6 0 He r t z Combi ned Pola r i z i ng Ca r d 4 8 I n t e r na l Conne c t i ons f o r 5 0 He r t z Comb i ned Pola r i z i ng Ca r d 4 8 Ca r d Layou t f o r Combi ned Pola r i z i ng Card . . • . . . . . • 4 9 I nt e r na l Connect i ons for 6 0 He r t z Ope r a t e S i gnal Ca r d 4 9 I n t e r na l Connect i ons for 5 0 He r t z Ope r a t e S i g na l Ca r d 5 0 Ca r d Layou t f o r Ope r a t e S i g nal Ca rd • . . . . . • . • • • 5 1 I n t e r na l Connect i ons f o r Coi nc i dence Log i c Ca r d • • • 5 2 Ca r d Layou t f o r Coi n c i dence Log i c Ca rd • • . . . . . • . . 5 3 I n t e r na l Connect i ons f o r I n t eg r a t i ng Timer Ca r d . . • • • 5 4 Ca r d Layou t for I n t eg r a t i ng Timer Ca rd . . . . 5 4 I n t e rnal Connec t i ons for 125 Vol t DC Rat ed I npu t Powe r Supply . . . . . • . . • . . . • . • . . • . . • . • 55 I n t e r na l Conne c t i ons f o r 1 1 0 Vol t DC Rat ed I nput Powe r Supply . . . . • . . . . . . . . • . . . . . • • 5 6 C a r d Layou t f o r 1 1 0 - 125 Vol t Ra ted I npu t Power Supply Ca r d 5 7 I n t e r na l Connec t ions for 4 8 Vol t DC Ra t ed I npu t Power Suppl y 5 8 Ca r d Layou t f o r 4 8 Vo l t DC Rated I npu t Powe r Supply Ca r d 5 8 C ra d l e Block and Te rmi na l Block C r o s s Sec t i on . • . . . • 5 9 P r i n ted C i r cu i t Ca r d Ex t ract i ng Tool • . . • . • . 5 9 Ou t l i ne and Panel Dr i l l i ng f o r Type SLY81A Relay • • • 6 0 F r o n t V i ew o f Relay Ou t o f Case w i th Nameplate Removed 6 1 Te s t C i r cu i t for Reach Te s t s . . . . . . . . . 62 Cha rac t e r i s t i c Test Ci rcui t u s i ng Te s t Box, Rea c t o r & Res i s tor . • . . . . . . . . • . . . . .

T ime r Ca r d Te s t Ci r cu i t . . . • . . . . . . . . .

Tes t C i r cu i t for MOB t e s t . . . . . • . . . • • .

Ope r a t i ng Time of 6 0 He r t z Relay Vs . S i gnal i nto Ope r a t i ng C i r cu i t . . . . . . . . . . . . . . . • . .

Ope r a t i ng T ime of 5 0 He r t z Relay Vs . S i gnal i n to Ope r a t i ng C i r cu i t . . . . . . • . . • • . . • • . . .

I n t e r nal Connect i ons D iag ram of P r e-Regul a t o r . . . •

Ou t l i ne and Moun t i ng D ime ns i ons of P r e-Regulator • . •

Te s t C i r cu i t f o r Cha r ac t e r i s t i c Tes t . . . • • . . . .

34

6 3 6 4 65

6 6

6 6 6 7 6 8 6 9

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w V1

1-zj 1-'· 10 c 1'1 ('D .......

0 1\J -....) w :x::o \0 0 \0 ....... I I-'

1-zj c ::s (') rt 1-'· 0 ::s Ill I-' IJ:I I-' 0 (') "" 0 1-'· Ill

10 1'1 Ill 3

!A

lB

Ic

VA @ )\ I ' r JCL:I l

Ve @)) I I J ,-= Vsc 1

REACH SETTI N G POTS

\I A- I s )ZR I-TVAB

VAs+0.3VABI I I

r=-M�E M_O_R_.,YI F I LTER

� a: 0 ,--... � � cr � � 3 � w

POL.ARtllt'(; 8 � SIG NAL ��

�� w 8 C ( I A- I s) Z R I OVE R CURRENT �� SUPERV IS IO 6: PHASE ANGLE

SEE c I ICOMP.

NOTE I � 0 8 Vc @ -:- VtA .---

+ r- 'ANGL E � �'-, t

c�r"

+ ..LKI

* �K2 M O B

* K3

K1

��q]) 2 �) ® T �> @ d> ® 1�� K 2 Y> ®

1 K 2 Exr ER NA L :.._ ® >>---i�

Q I NDICATES ST U D No. ON RE LAY

RrtuRLI);To R +'@: ��O�EE I * TY PE SLY B I B O N LY L>C:V

� ..... :@ > U p y NOT E 1 : PR E - RE GULAT O R US E D F O R T K 3 *

tr"l I �I O S U R G E RATE D INPUTS E XCEE DII\G I _ . @ �- -l � > GROUN D 1 25 VDC � >

C\ m � I � \0 00 en �

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�-+----�--4---�V�A=-B I O VBC

42 41

2 o S P 1----t-------V-'--C=-'A-'-- 3 O

SVAB 6

: SVBC I I I I 8

I SVCA i 2 8 I

q :o

I AZ T r r I BZ 47 L 1 2 I CZ 48

L ��

"' 0 "' "' m ... "'

0

G E K-49861

2n-VAB 5 I I 2 8

2 3 4 "'Vc:_P_:_cA_----1 3 1 40-VBC :2 C P

2 6 �

45 ° 2 2� 4

25 � r=-::1-----j---, 2 0 2 4n-VCA 1 3 "'

4 1 "' 40 � !..rh.-TD� 44 o 7 � 1 6

1 9prt:l 3 2 3 2 - (A) 49

4 3 I 9 I--3 6 -�z 2 2 � � -aJc- IAI Z �

-COA- IRl Z

I 8

1 3� 1 1 0 5 1 0 � 3 0 43 I 9lrf-- 32 ..-

I L 1 6 m co

22� 24 � 23 '-- 3 6 0 I _ h--- 2 8 "' 3 7 3 3

1 cL39

: 3 7 48

1 2

I T "' "' ... "' 2 3 m ... "' -0

I I f--- 6

4413 ;;; I 9 4 S f-- 3 6 43 I 9

43 I 9 43 I 9 liL___-------ji---+r _ _L__ r ---+---� 1 1 1

NOTE I

4----+-----'---- I T 1

I

PRE-REGULATOR USE D FOR RATE D INPUTS E XC E E D I N G 1 2 5 V D C

*=SHORT F INGER

I+) A

I

c

e

( - )

E X TERNAL

P R E-R E GULA TOR SEE NOTE I

.------VRI

{

I K2 2

R I OS

40 24

P S I 7 f-.----------'

0 1 8 48 5 6 0 9 I SO 3 2 9 I 43

REF

- I S\

7 K2

1 0

F i g u r e 2 ( 0 152C8 4 8 9 -2 ) I n t e r nal Connect i ons f o r Type SLY81A

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G E K-49861

I ��----�� -----� --�VA�8� 1 0

42 2n-VA8

� 1 j ! V8C 2 8 . +--ll __ _;_! ____ _,_vc.,..A�

j: : 5 P 1 40

,

- vsc !; C P 4f-'v_,_P.:.:_A __ -1!

4 1

lo!T'-'FPA"l------1---·__,...' �__.,_5V,_,A,B'-i 6 I 45 :::; 2 2� I �� 2 4ni

.- VCA . 1 3 � ' 2 5 � 2 0

llol f.!...IPO!.B -1--�--+1__::_5Vc..::8:..::C...jil 1 8 "' i � 1 o 4 o � I �� ! I o 7 � 1 6 1 8

• ' I � � 1 9� 3 2 u�.�� IP.c.c..;__t_..=5.!...vc�A�· 2 8 ... 3 2 � 4 9 1-- 2 1 C L I 1 -0 <0 : 43 1 9 I I 3 0 _ /-CGA- JslZ I . I I S O ; � �-��:��� 2 2 3 4 A i �

· 43 1 9}[

- 3 2 ... ! Ai- 1 1 1 3 � 1 1 0 5 1 0 � 3 0

i 1 8� 47 l _.i:-::-- 1 6 m ,:;!; .+----:.::.;:..., L 1 2 2 2 � 2 4 <:; 2 3 '-- 3 6 o 1 ! CZ 48 _.i:-::-- 2 8 � 3 7

L 49 4 1 ::

, ! 1 2

I T 1 1 -i-I

"' I "' ... 2 3 �

� <0 -0

-

(+) A

I

c (-)

EXTER NAL

P R E - REGULATOR SEE NOTE I

,---VR 11f �K2

� �-4""0--�2o'-4c---> 6 p 5 1 71--------' 0 1 8 48 5 6 0 9 1 5� 3 2__j 9 1 43

�---'-';'=-! " "!if " . " ' "

4 3 1 9 45 43 ° 1 9 4 5 -- 3 6 i L� I �"' " ' " = J .. ��- ···�·· ' 'J_:� L:T4�3_�_:_�-T-J

9---+--l

L__

-R_E_F -_1 s-';v

I �- --

-�

-

--

---

L_

NOTE I PRE-REGULATOR U S E D FOR R A T E D INPUTS O C E E D I N G 1 2 5 V D C

*= SHORT F I NGER

F i g u r e 3 ( O l52C8 4 6 l - l ) I nt e r nal Connect i ons for Type SLY 8 1 B

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G E K-49861

x � P H A S E S E Q U E N C E 1 - 2-3 ' ---------�---�------�----------------------r------------------------

2---------------�------4----------------------�-------.---------------3 ------�------�-------�-----------------------+-------�-------r------

3 2

TR I P P I N G D I R E CT I O N l

C I RC U I T B RE A K E R

3 2

1 7

o t o -L S U R G E -=- G R O U N O

�) \+)�----------------�--------�----� 1 4 7 NOTE I 0 A : -----:�w�:

T (SLY81B) ONLY CT &PT G ROU N D S SHO'U L D BE M A D E AT THE SW ITC H BOARD.

B - - - -' S U P P LY

K 2

T9 T K 2

tf� T R I P

T8MoB

K 2

l' 8 AUX. RELAY

T R. l P (-) t-) E XTER NAL --�---------------------------------

NOTE 2

PRE- REGULATO R SEE N OTE 2 * R E L AY H O U S E G R O U N 0

6. SUPE RVISING CON TAC T WHERE US E D

PRE- REGUL ATO R USED FO R RATE D INPUTS EXCEE D ING 1 25 VDC

F i g u r e 4 ( 0 2 7 3A9 0 9 2 - 2 ) Ex t e r nal Connect i ons

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G E K-49861

X B -----::

XC ----

'------TB

K3 RELAY �-- TYPE SL Y81 B ONLY

XA

F i g u r e 5 ( 8 0 4 3 5 4 2 ) Rea r V i ew of Long r each Model Ou t of Case

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BASE TAP I N D I CATOR ---

G E K-49861

tT Cl PS

I I I I ,

CP OS SP I l l

PERCENT R ESTRAI NT

ETT I N G T

F i g u r e 6 ( 8 0 4 3 5 4 0 ) Front V i ew of Relay Ou t of Case

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G E K-49861

F i g u r e 7 ( 8 0 4 2 9 8 6 ) Re s t r a i n t Se t t i ng D i a l ( Se t at 8 4 % )

II CL 11

I NPUTS

I I I

11CL11 I I ou_r_P_u_T

__

__ �F90o=4�--� 11 1 T II

OUTPUT

F i g u r e 8 ( 0 2 7 3A9 0 9 3 - l ) Mea s u r eme nt P r i nc i ple

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G E K-49861

40 F I RST ZO NE RELAY

35 0 -u fTl ::0 ::; 30

AVE RAGE T I M E I NCLU D I NG

I OUTPUT RELAY REACH = 90 °/o OF L I NE 1 00 M ILE LINE I 2 5 M I L E SOURCE

6 0 H ERTZ R E L AY 1/ z (j) -I 25 3:: fTl

z 20 3:: I c 1 5 CJ) fTl () 1 0 0

J - v

v / � v

--:z 0 (f) 5

0 0 I 0 20 30 40 50 GO 70 80 90 100

FAULT LOCAT I ON AS PER CENT OF L I NE LENGTH

F i g u r e 9A ( 0 2 7 3A9 0 9 4- 2 Sh . l ) Ave rage Ope r a t i ng T ime f o r F i r s t Z one Relay - 60 He r t z

0 -u fTl

40

35

� 30 -I z 0 ::::! 25 s:: fTl

2 20 s:: I I Cli 15 fTl 0 0 z O IO CJ)

5

0 0

FIRST ZONE RELAY I AVERAGE T I M E I N CLUD I NG

J OUTPUT RELAY REACH = 90°/o OF L I N E 100 M I LE L I N E

1/ 25 M I L E SOURCE 50 H E RTZ RELAY

I

/

/ ---v

I 0 20 30 40 50 GO 70 80 90 100 FAU LT LOCAT I O N AS A PERCENT OF L I NE LE NGTH

F i g u r e 9 B ( 0 2 7 3A9 0 9 4 Sh . 2 ) Ave r age Ope r a t ing T ime f o r F i r s t Zone Re lay - 50 He r t z

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1 6

0 1 4 -u fTI ::0 � z 1 2 (j) -i � 10 z F r

I � 6 () 0 z g 4

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G E K-49861 ---

SEC O N D ZONE RELAY AVERAGE TIME I NCLUD I NG OUTPUT RELAY REACH = 175°/o OF L I NE 1 00 M I LE L I N E v 2 5 M I LE S O UR G E v 6 0 H ERTZ R E LAY /

v v --

0o 10 20 30 40 50 60 70 80 FAULT LOCATION AS PERCE NT O F L I N E L EN GT H

/ v

90 1 0 0

F i g u r e l OA ( 0 2 7 3A9 0 9 5- 3 Sh . l ) Ave rage Ope r a t i ng T ime f o r Second Zone Relay - 60 Her t z

0 -u fTI :u

1 6

14

� 1 2 z Q :::itO � fTI

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� r r (i) G fTI n 0 6 4 (f)

2

1--

1---

SECO N D ZONE R ELAY /v AVERAGE T I M E I N CLUDING v OUTPUT R E L AY / REACH = 175°/o OF L I NE 100 M I LE L I N E

v 2 5 M I L E S O U R C E 5 0 H E R T Z RELAY �

--

10 20 30 40 50 60 70 80 90 100 FAU LT L OCAT I O N AS A PERCENT OF L I NE LENGTH

F i g u r e l O B ( 0 2 7 3A9 0 9 5 Sh . 2 ) Ave r age Ope r a t i ng T ime for Second Zone r e l ay - 50 He r t z

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·-- -··>�•

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G E K-49861

--...... ·�- ··-------

0 co 0 ,...._ 0 (J)

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lf) 0 w __J CL

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l'VN I V\JON .:10 °/o N I H:)\i3tl � >

F i g u r e 1 1 ( 0 2 73A9 0 9 6 ) Reach Ve r sus Fau l t ed Pha s e Vol t age

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� l.n

1-zj ..... 10 c 1'1 CD

....... IV :J;=o

0 .......

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w ..... (/) IO ::r ::s • lll w ....... ...-. '1:1 ......, 1'1 ..__. o _ 0 CD Ul H [/) ::s ..... rT ::S CD 10 1'1 n ::s Ill e. 1'1 o. n

0 - ::s tll ::s "'d en

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·> 3 6 Gc < lA - Ie l Z] 'Y 1 T I U� )> 1 3 [G(< lA - le l - TVAe )]

L_----���-t======------------------------------------�> 2 t VAeJ

r 1 ""

I I I I )) 1 9 r: ( I B - lc ) z] I I I �R58 I 1 � III R 5 0 3 8 . 3� III R5 1

1 1 5� III R 5 2 5 7 . 6�

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Y I I )> 22 [£; ( < t8 - tc 1 - Tvac >]

l_ __ _j�+-�------------------------------------�> 1 � [ v a�

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P 6 iiii< ·> 3 � Gc < t e - lA 1 zJ lii R 7 1

')7 1 I )> 3 3 G(< te - lA l - Tvc.VJ l O OK � I I I

1 1 5� < t c Z l lS<E �· 1

1 :� g¥ g;: I L------1-----+=���=====================================> 2� [�� < I• Zl 4 7 (( -C:::}---,

C====j===================-----------------------�> 3 [t oz� lit RE:S 1 STORS ;!: 1 "70 RN6 OC ALL RES I STORS 1 / � WATT ± 5 "70 CARBON l C 1 THRU 1 C7 • 1 5 5 8

! C8 THRU 1 C l 0 • 5 5 5 < Je Zl 41 ( - ., . , 1 C l 1 • 9 1 0 9 >-'--�---------T'----------------------------------------------------�:> 5 0 [ loZ� 0 1 •2N2 9 0 7 ( 'c z l 41 (( . t::::5----'

2 . 2 � '( + I 5 VOLT I •

TO p 1 N 8 Of ' I - - ! C I THRU 1 C 7

• T0 P I N � Of ! C 1 THRU I C 7 TO P I N 7 Of ! C 1 1

ALL D l ODE:S• l N � l � 8 ALL CAPAC I TOR VALUES I N MfD

� m " I

� 00 en ....

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G EK-49861

Ln 0 8 W S d Ln - C\J

Figure 12B (0171C8706 [ 8 ] } Card Layout for Type SLY81A Signal Processing Card (SP}

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C R \ 2 ( MT l � 2 (-E------- -------i+--- --

G EK-49861

PCB 0 1 7 1 C B 7 0 6 F - l A5M 0 1 8 4 8 5 6 0 6 G - 1

I C 1 THRU I C l � 1 5 5 8

I C 8 THRU I C \ 0 = 5 5 5 I C \ 1 • 9 1 0 9

-- -- -----o.> s o C lozo] O J - 2 N 2 9 0 7

ALL O I ODE5 • 1 N4 1 48

ALL CAPAC I TOR VALUES l N MFD

Figure 13A (0152C8463 Sh . l ) Internal Connections for Type SLY81B Signal Processing Card (SP )

Figure 13B

l/) 0 8 W S d l/) C\J

(Ol71C8706 [ 8 ] ) Card Layout for Type SLY81B Signal Processing Card (SP )

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G E K-49861 PCB 0 1 7 1 [ 8 7 0 7 P - 1 ASM 0 1 8 48 5 6 0 7 G - 1

< -v ec l2 J < ( - V c• l 4 1 < )IE R -4 2 2 . 8 7 K

( - y C A ) 2 5 ( 3 ( - V u l 4 2 <

lOE R 8 c - v ac l 2 6 < ( - YeA ) 4 4<

< -v Afl l 2 8 < ( - V rJC l 4 5 < > 3 9

> 3

-VCA 1.5 1< 1 . 5 1<

- I , 5 1<:<--------'---_j

O . J JMFD sov

g <E + ! S VOLT

I�� � HfD s ov

F i g u r e 1 4A

O . J JMFD sov

+ ! 5 VOLT 9 (( 1�: 1 MFD sov I 1 S l <:<--'-rO_V':'OoclccT __ _

C 9 2 0 . 1 MFD

0.3 3MFD s o v 2 1 <

R ! 7 I O D K

t . 5 1 <

O . J JHFD s o v 3 9 <

.6. RESI STOR VALUE SELECTED I N TEST * RE S I STOR± ! ?.; R N 6 0 C

A L L OTHER RESI STORS 1 I 4 WATT :±5 7. CARBON ALL I . C . '5 1 5 5 8

8 T R I M POSTS 0 TEST PO I N T

( 0 1 5 2C 8 4 6 4 Sh . l ) I n t e r na l Connect ions f o r 6 0 He r t z Comb i ned Pola r i z i ng Ca r d ( CP )

O.JJMFD sov

.:R42 ( -V CA ) 41 ((<----2::e,:;8==!7-:-:K--,

PCB 0 1 7 1 C 8 7 0 7 P - 1 ASM 0 1 8 48 5 6 0 7 G - 3

( - V AB ) 4 2 <:<-----'lOE-(:R�4:'f3'-'--''---

-vee l o 5 !<<------�---�

0 . J JMFD s o v

> 3 9

T sov 4 3 <:<-< --L-_I,_,S._.V"'O"'L T-'-----">> 1EL

P l �s 4

..t.. RESI STOR VALUE SELECTED IN TEST * RESI STOR±! '?a' RN6 D C

F i g u r e 1 4B

ALL OTHER RESI STORS 1 / 4 WATT±s 7o CARBON ALL r . c . �s t s sa

® TR I M POSTS 0 TEST PO I NT

( 0 1 5 2C 8 4 6 4 Sh . 3 ) I n t e r nal Connec t i ons f o r 5 0 H e r t z Combi ned Pola r i z i ng Ca rd ( CP )

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F i g u r e

C3

-

G E K-49861

G8WSd In N

In M

D� DO�; � k • • • t: C43 k k -N u L..-------JI :

I (.!)

�

t) :B ..

Soon dl�oon�� ! � o oH � , ,O O�fS[T� ¥ � � � � Of'"fS(T� : � OffS[T�-�

F i g u r e 1 4C ( 0 1 7 1C87 0 7 ) Ca r d Layou t Pola r i z i ng Ca r d ( CP )

for Comb i ned PCB D 1 5 2C 8 4 4 0 P- 1 ASH 0 1 8 4 8 5 4 2 9 G2

* R 5 4

R 5 7 1 OOK

>'--'----+-4> 3 7

l SA ( 0 1 5 2C 9 0 8 7 Sh . 2 [ 1 ] ) I n t e r na l Ope r a t e S i gnal Ca r d

49

ENG NOTE - Co�= 2

0.33HFD SOV

_. RE S I STOR VALUE SELECTED I N TEST )II( RESI STOR± t '7. R N 6 0 C

ALL OTHER R E S l STORS 1 / 4 WATT±S 7. CARBON ALL I . C . '5 I 5 5 8

S TR I M POSTS Q TEST PO I N T

Connect i ons ( OS )

for 6 0 He r t z

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* R 1 4

9 <11•_1 5_VOLT TO P I N 8 C 9 1

�ALL I CS

0 . I MFD T s o v

l o S !<( � C

V9�L T

_!__ 0 . 1 M F D T s o v

4 3 <( - 1 5 VOLT ) TO P I N 4 ALL ICS

F i g u r e 1 5B Ope r a te S i gnal

( 0 1 5 2C 9 0 8 7 Ca r d ( OS )

G E K-49861

2 4 <+---------

Sh . 4 )

PCB 0 J 5 2C 8 4 4 0 P - 1 ASM 0 1 8 48 5 4 2 9 G - 4

R57 1 O OK

>--'----t---'--7> 2 3 > 3 7

0.3 JMFD O,JJMFD s o v s o v

> 3 0 R 3 8 1 O OK

ENG NOTE- Q : 2

4 R E S I STOR VALUE SELECTED I N TEST * RES ! STOR±1 � RN6 D C

> 4 5

ALL OTHER RES I STORS 1 I 4 WA TT±S 7o CARBON

I n t e r nal

50

ALL ! . C . ' S 1 5 5 B 0 TR I M POSTS

Q TEST PO I NT

Connect i ons f o r 5 0 He r t z

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G E K-49861

Lll 08WSd Lll N Lll M

F i g u r e 1 5C ( 0 1 5 2C8 4 4 0 - 3 ) Ca r d Layout for Ope r a t e S i g nal Ca r d

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'TJ ......

1.0 c 1"'1 CD

...... 0'1 :J::o -0 ..... U1 tv () \0 0 (X) w {f.) ::r .

t-t W o -

1.0 ...... () H

::s

VI (') rt" IV I)) CD

1"'1 1"'1 o.. ::s

Ill _ ...... () t-t n - o

::s ::s CD () rT ......

0 ::s r:n Hl 0 1"'1

(') 0 ..... .

::s () ......

0.. CD ::s () CD

P H A S E A C I R C U I T P H A S E 8 C I R C U I T

9 <:�.....----- 9 <�-r-------�

3 <�

2 0 <�

4 <�

43 <�

PCB 0 1 5 ZCI431 �- 1 P H A S E c c I R C U I T ASP1 0 1 1 485 425 G-3

9<+----,--------

CR6 1

( + 1 5 V l TO P I N 3 9 (( I Of" "LL I cs C l

T 0 . 1 Mf"D 50V I , 5 I <E ( OV l � TO COI'1

t oc.21 Mf"D 5 0V : 1 5V JTO P I N 1 2 4 3 <� Of "LL I CS

ALL RES I ST�S l / 4 WATT%5� CARBON ALL I CS Lt12 310 ALL TRANS I ST�S ZN2222A ALL D I ODES IN4 1 41

C\ m � I

� 00 en ....

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GEK-49861

1 5 0 ID :1:: (f) 0.

Figure 16B ( 0 152C8436 [ 4 ] ) Card Layout for Coincidence Logic Card ( CL )

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43 <

Figure 17A

��

Figure 17B

G EK-49861

(0152C9084 Sh. l Integrating

1,1) -

-<C ID U

08WSd 1,1) N

[ 2 ] ) Timer

s

PCB 0 1 5 2 C 8 4 3 7 P - 1 ASM 0 1 9 48 5 4 2 6 G - 1

T O P I N 4 All I C A

4 J <:<-< ----'-==-�--_1_

ALL D I DOES I N 4 ! 46 liE R 2 4 o R 2 5 o R 4 4 o R 4 5 o R 6 4 o R 6 5

ARE ± I � RN6"0C ALL OTHER RESI STORS ARE 1 / 4 WATT±S "lo CARBON ICA 1 5 5 6

! CO 9 1 0 9

Q l l 2 N 2 2 2 2 A 0 ! , 0 2 J , Q4 J o 06 ! 2N2 9 0 7 C 2 i o C 4 ! o C 6 1 ARE 0 , 3 3 MFD + 2 '7., S O V

P l �TRANS J E NT P I CKUP T I ME P2 zSTEADY STATE P I CKUP

T I ME PJ '"DROPOUT T I ME

Q mTEST P O I N T

OUT

Internal Connections Card (IT)

1,1) 1,1)

~ C"'l ...,.

for

(0152C8437 [ 7 ] ) Card Layout for Integrating Timer Card (IT)

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"'ii .....

"l s:: 1'1 (t) 1-' co > C 7

O.'J S MFD ..... 0 1-' R 1 O U1 4 0 < n "' 5 1 Cl. I n 2 W � co

PJ � 3 2 < ('t O'\ (t) Ul 0..

I en H ::J" ::s • '0 1-' s:: rt ..... I � '0 ...... o -� C l U1 (t) I MF D U1 t1 H 2 0 0 V ::s en rt s:: ro '0 1'1 'O ::S 1-' Pl '< I-' n n I PJ O t'i ::S I o. ::s (t)

- o 2 4 <· "d rt en ..... - o ::s til H'l I C I • I C 2 • 0 2 4 6 A 9 3 3 8 � - I S 0 Q l • Q 2 • 0 2 4 6 A 9 2 1 2 P - 3 4 3 9 1'1

Q3 • 0 2 4 6 A 9 2 0 1 � - 2 2 2 2 1-' Q 4 • 0 2 4 6 A 9 2 0 2 P - 2� 0 7

II.) QS • 0 2 4 6 A 9 2 2 0 P - 4 2 2 1

U1 < 0 1-' rt"

R 2

1 O O .n 2 W

I 0 R 3 I � �K

C 2

I I R S 3 . 9 K

I 0 1 CR I

I 0 R 6

1 8 n � CR2

T l

5

4

TEST PO I NT

0 CR I 5

CR4

LED I

I C I l UU" 1 1 4 .. I 9 ( + 1 5VOLTS l 1 � I I ))

f--------L�> I • 5 I < 0 VOLTS l

I I I I I • v v " " -- I )) 4 3 ( - 1 5VOLTS l

R 1·2

I M I I 4W

C.CE2u F

> 9

> 4 3

� m � I ,J:Io \D co 0\ ....

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F i g u r e

' "

m r U (f) Q. <(

1 8B

u

....

C: :x "' - "' 0 "' .._ l I:

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(/) .... ...J 0 > "'

"'

(/) .... 5 >

G E K-49861

(/) .... 5 > "'

.., ..

I< "' "' "' .

..,

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.... z 0 � 0 (/) loJ ....

- 0 > u t.. <> I: <>

- N

� � "' '

�

( 0 1 5 2C8 4 6 5 Sh . 3 [ 2 ] ) I n t e r na l D C Rat ed I npu t Powe r Supply

56

.., ..

"' u

... ... " "'

"' ..... z "'

... ... . ., .., hJ

"' u

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0 loJ ...J

.. "' u

c: ..... .. ., _

N "' u

.. "'

Connec t i ons Ca r d ( PS )

"' "' _ .,

. .. .. .., 4\1 ..... -I N C N

• Q.. N Cft N ""' N N ... fO"f N I I I "' - L D.. D.. "' "' wt at - N O .... o( C O t\1 N \O N N N O ._ crt Cit Gt I N o( o( <('

N D \D !oD !oD u . .. ... .. - N N N I'\I • O o o o - I I I I u - '"" ""' "' - c o c o

f o r 1 1 0 Vol t

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G EK-49861

....------- n .....

Figure 18C (0171C8709 SS Sh. l [ 8 ] ) Card Layout for 110-125 Volt Rated Input Power Supply Cards (PS)

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C 7 0,05 MF"D

C l l Mf'D 2 0 0 V

Il l CR I

R6

R 3 6BK

R 4

I O n

R S 3 , 9K

! O n CR2

GEK-49861

TEST PO I NT 0

CR4

R 1 2 R ! S I M 1 / 4� MK

LED!

PCB 0 1 7 1CM 0 9 ASM lll64B561l9 G-.a

2 4 <•�------�--�L_-L�11�2��-L----------�--liL�

1 C l • I C 2 • 0 2 46 A 9 3 3 8 P - 1 5 ll l •ll2 • 0 2 4 6 A 9 2 1 2 P - 3 4 3 9 ll 3 • 0 2 4 6 A 9 2 0 1 P - 2 2 2 2 ll 4 • 0 2 4 6 A 9 2 0 2 P - 2 9 0 7 ll 5 • 0 2 4 6 A 9 2 2 0 P - 4 2 2 1

�> I S 1 K l �> 1 7

Figure 19A (0152C8465-2 Sh . 2) Internal Connections for 48 Volt

Fi g . 19A ( 0 152C8465- 2 sHI?� ��t�� tJM?M:t;�P¥&1" 4�mli?� lfiiMJdin���ower Supply Card ( PS )

If) In ...

�....-___ __.I � �----. C-;..:1=----tRe C4

Figure 19B

c'fl ri1 R1 3u ·

u Qt ;

LED1

... 5 +1 5V D CR8 II

(0171C8709 SS Sh. l [ 8 ] ) Card Layout for 48 Volt DC Rated Input Power Supply Card (PS)

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G EK-49861

CO N N ECT I N G PLUG M A I N B R U S H CO N N E CTIN G B LOCK

A U X I L I AR Y B RU S H ---'

S HORT I N G B A R --�

N OT E : A F T E R E N G AG I N G AU X I L I AR Y B R U S H CO N N ECTIN G P L U G T R AV E LS Y4 I N C H BE FO R E E N G A G I NG T H E M A I N B R U SH O N T H E T E R M I N A L B LO C K

F igu r e 2 0 ( 8 0 2 5 0 39 ) C radle Block and Termi na l Block C r o s s Sec t ion

F igu r e 2 1 ( 8 0 4 3 0 1 6 ) P r i nted C i r cu i t Car d Ext r ac t i ng Too l

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G EK-49861

2 0 , 3 1 2

5 1 6 M M

G L A S S

1 . 1 25-

_ I 2 9 M M I

I -..---l---A--1 - - - ;- - -'9 ' 9 3 7

1 5 . 56� 3 9 6 M M L T

'

. 2 1 8J 5 M M

� ! 2 5j_2 M M - rt- -�- - - • C U Tb U T I 1 9 , 8 7 5 - - -i- - - � 5 04 M M

'---+-----'' w 5 . 6 8 7

1 4 4 M M

I . 2 1 8 I I 1-t-- 5MM �I I PANEL_//

P A N E L D R I L L I NG F O R S E M I - F L U S H M O U N T I NG

F R O N T V I D J

. 7 1 8 1 8MM

3 . 0 T Y P I C A L D I M ' I 7 6 M M

3 / 4 D R I L L 2 0 H O L E S

S T U D

N U M BE R I N G

9 7 5 3 1

0 0 0 0 0 0 0 0 0 0 1 0 8 6 4 2

B A C K V I EW

1 9MM PANEL D R I L L I NG F O R S U R F A C E M O U N T I NG

F R O N T V I E W

5/ 1 6 - 1 8 S T U D

I N C H E S V I E W S H O W I NG A S S E M B L Y O F H A R D W A R E M M F O R S U R F A C E M T G . O N S TEEL P A N E L S

Figure 22 (0178A7336 [ 6 ] ) Outline and Panel Drilling for Type SLY81A Relay

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G E K-49861

r-:=r'-""-:':'flE""'--;:==----TELEPHONE R ELAY K2

DROPOUT T I M E

I T CAR D

TRANSI ENT P I C K U P T I M E P1

C P CARD ---

OS CARD ---....

=-- L.t:FT HAN D TAP PLATE

I G HT HAND TAP PLATE

ER SUPPLY LI GHT

PERCENT R ESTRAI NT ETT I NG T

PHASE 8 OVERCURRENT P4

PHASE C R EACH PS

PHASE C OVERCU RRENT P6

MOB CHARACTER I ST I C T I M E P7

F i g u r e 2 3 ( 8 0 4 3 5 4 1 ) F r ont V i ew o f r e lay Ou t o f Ca s e wi t h Nameplate Removed

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I'Zj .....

10 c: I"'( Cll "' �

0 "' � w ):o \0 0 \0 �

I ........

en 1-3 IV Cll

[/) n-n ..... I"'( 0 c: ..... ('1" HI 0 I"'(

� Cll n.t 0 ::r 1-3 Cll [/) ('1" [/)

N OT E I : PR E- R E G U L ATO R U SED FOR RATE D I N P U TS EXC E E D IN G 1 2 5 V D C

P H A S E S H I F T E R I AMPE R E RELAY UNDER TEST - VA R I ABLE 120 \IOLTS 1 2 I 1 2 3 PHASE

3 W IRE 60 Hl 3 I I 1 3

6fi R E ACTOR = ,...,....,....

AUTO T RANS FO RMER

), " (

CURRENT INPUT + -

6054975 CURRE NT 4VE RN IER

LOAD BOX

PHASE REL AY STU D N O . U N DE R CONNECTED TO PO I N T TEST P Q W X

- - - - -

A B 1 5 I G I· 3

B C IG 1 7 3 5

C A 1 7 1 5 S

J U M P E R FR O M O V T E S T P O l N T 0 N P S C A R D TO T E S T P O l N TS O N I T

C A R D L l S T E D B E L O W 8 1 N ¢ C I N A I N $ C I N A I N � B I N

# C O N N E C T E D TO R E A D A N G L E C U R R E N T L A G S V O LTA G E

T H A T

l l . . CONTINUITY TESTER

D.C. POW E R S U P P LY

0 - 250V

0. 5 A

SEE N OTE I RATED I NP U T VO LTAG E

" m " I � ID co en ...a.

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t'Zj .....

U) c t-t ro IV U'1

-0 IV ....J w :J:o \0 0 \0 (X)

I ..... -

:;tl ro n Dl ::r (") Dl rT t-t O DJ t-t (")

rt Dl ro � ::I t-t 0. ..... w :;tl � ro ..... m n ..... [1) 1-3 rt ro 0 [I) t"t rt

n ..... t-t (") c ..... rt c::: [I) ..... ::I U) 1-3 ro [I) rt tJ:I 0 X ...

N OT E 1 : P R E- R EG U L ATO R US E D FO R RAT E D I N PU T E O I N P U T S EXC E E D I N G 1 2 5 VO C

1 2 0 VOLT S G O HZ

S W I T C H

1 0 2 L 2 0 1 I I

T E S T ¢ B O X

I Ll _ _ _

� C A L I B R ATE D R E A C TO R R E S I S TO R CO M B I N AT I O N

RELAY UNDER TEST 1 1 ' . CONTINUITY

TESTER

C\ m ,.:; I

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G E K-49861

* T H E '+ 1 5V."T EST PO I.NT HAS A lOOK OHM CURRENT L IM I T ING RES I STOR MOU NTED ON THE ''PS'' CARD.

,, v.

PO I NT *''+15 TEST ON Np S'' CARD

NC CONTACf :; �

� ��o v\\ T E ST POI NT

O N "p s'' CARD

PHASE U N DER T EST

AB BC CA

F i g u r e 2 6

� SC OPE CHANNEL 1 AND SCOPE TR IGGER

IT C ARD

I N PUT I

..--- I NPUT JI 1 1 - SC OPE CHAN N EL 2

I 1-- I N PUT III

SCOPE GROUND

P I N No. O F C A R D INPUT I I NPUT TI I NPUT III

1 2 2 3 3 6 •

23 1 2 36

3G 1 2 2 3

( 0 2 7 3A9 0 9 9 ) Time r Ca rd T e s t C i r cu i t

64 www . El

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