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DATE: 27/11/2011DOC.MIE92093 REV. 1.35

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DOC. MIE92093 Rev. 1.34 Page 2 of 108

REVISIONS SUMMARY VISA

N PAGE DATE

1 All 20/10/2008 Issued Lodi

1.28 26 2/02/2010 Added the paragraph

test results handling

Lodi

1.28

-1

17, 37 1/10/2010 Added the TD1000

model and the 15 Hz

Lodi

1.34 11 –13;41

7/9/2011 Revised to issue 1.34;removed the serial

I/F

Lodi

1.35 39 27/11/2011 Added the FT1000

connection

Lodi

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SHORT FOREWORD ...................................................................................... 5

INTRODUCTION ............................................................................................. 6

1 TEST SET EXPLANATION ...................................................................... 9

1.1 CONNECTION TO THE RELAY AND POWER-ON ........................................... 9

1.2 TEST CONTROL .......................................................................................... 10

1.3 CURRENT GENERATION ............................................................................. 14

1.4 AC VOLTAGE GENERATION FROM MAIN OUTPUT ..................................... 18

1.5 DC VOLTAGE GENERATION FROM MAIN OUTPUT .................................... 18

1.6 AC VOLTAGE GENERATION FROM THE AUXILIARY OUTPUT..................... 19

1.7 DC VOLTAGE GENERATION FROM THE AUXILIARY OUTPUT .................... 23

1.8 AUXILIARY CONTACTS .............................................................................. 24

1.9 THE TIMER ................................................................................................. 24

1.10 FINDING RELAY THRESHOLDS ................................................................ 26

1.10.1. Introduction ........................................................................ 26

1.10.2. First threshold trip and drop-off ............................... 27

1.10.3. Second threshold trip and drop-off ......................... 28

1.11 FINDING RELAY TIMINGS ....................................................................... 28

1.12 TEST RESULTS HANDLING ...................................................................... 30

1.13 BASIC TEST PRINCIPLES ........................................................................ 32

1 13 1 I d i

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3.2.6 CONV T1000 board PWA11401 (16)........................... 69

3.2.7 INTE ON-OFF T 1000 board PWA11400 (7) ........... 70

3.2.8 MICR T 1000 board PWA41300 (15) .......................... 70 3.2.9 AP-50 AC Voltage board PWA11396 (10) ............... 70

3.2.10 Protection fuses ................................................................... 70

3.2.11 Connectors summary ........................................................ 71

4 THE HELL, IT DOESN’T WORK ......................................................... 73

4.1 INTRODUCTION ......................................................................................... 73 4.2 ERROR MESSAGES .................................................................................... 74

4.3 TROUBLE SHOOTING ................................................................................. 76

4.3.1 Auxiliary supplies .................................................................. 79

4.3.2 No power at power-on ........................................................ 79

4.4 AUXILIARY DC VOLTAGE FAULT ..................................................... 80

4.5 AUXILIARY AC VOLTAGE FAULT ............................................................... 83 4.6 NO OUTPUT FROM THE MAIN CURRENT AND VOLTAGE ........................... 84

4.7 DOES NOT MEASURE THE MAIN CURRENT ............................................... 85

4.8 THE BACKLIGHT OR THE DISPLAY DOES NOT OPERATE .......................... 85

4.9 THE AC VOLTAGE MEASUREMENT IS NOT STABLE .................................. 88

4.10 THE TRIP INPUT IS NOT DETECTED OR TIMING ERROR ........................ 88

O S G G 90

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SHORT FOREWORD

Dear T 1000 PLUS user,

I often wondered why the user’s manual is not very much used,

even if it includes valuable information. As me too I am a user of

such manuals, the answer I have given myself is that valuable

information are concealed somewhere in the thick thing, and I donot have time to waste to find it. So, either the manual is actually

of help, or I ignore it.

This is why I decided to split the T 1000 PLUS manual in three:

specification, with all performance details; application manual,

with instructions about how to use it one its operation isunderstood; introductory guide, with the device description and

basic information. The idea is that you may read once the

introductory guide or the specification, while you need to follow

application examples more than once; so, why not to split the

manual in three?

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INTRODUCTION

The single phase relay test set mod. T 1000 PLUS is suited for the

testing and adjustments of the following types of relays; the table

lists also the paragraph that explains the test procedure.

Type of relay IEEE code PARAGRAPH

- Distance* 21 1.12- Synchronizing 25 1.8

- Over/under-voltage 27 - 59 1.2

- Power, varmetric or wattmetric 32 - 92 1.4

- Under current 37 1.1

- Loss of field 40 1.10

- Reverse phase current 46 1.4

- Instantaneous overcurrent 50 1.1

- Ground fault 50N 1.1

- Timed overcurrent 51 1.1

- Power factor 55 1.4

- Directional overcurrent 67 1.5

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The instrument contains three separate generators:

. Main generator, which generates either AC current, AC voltage;DC voltage;

. Auxiliary a.c voltage generator, that generates an independent,

phase shifting a.c voltage;

. Auxiliary DC voltage generator, that generates the DC voltage

that feeds the relay under test.

All outputs are adjustable and metered at the meantime on the

large, graphic LCD display. With the multi-purpose knob and the

LCD display it is possible to enter the MENU mode that allows

setting many functions, which make T 1000 PLUS a very powerful

testing device, with manual and semi-automatic testing

capabilities, and with the possibility to transfer test results to aPC via the USB interface. These results can be recorded,

displayed and analyzed by the powerful TDMS software, which

operates with all WINDOWS versions, and allows creating a data

base of all tests in the plant.

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the multi-function knob. With less power, the maximum voltage is

reduced by a factor of 4.4; the adjustment span on the knob is

increased accordingly.

Additional features are:

. Two meters, current and voltage, with independent inputs, allow

measuring T 1000 PLUS outputs or any other source;

. Two auxiliary contacts, that allow simulating the circuit breaker;

. A set of resistors allows easing output adjustment.

The instrument is housed in a transportable aluminum box, that

is provided with removable cover and handles for ease of

transportation.

NOTE: WINDOWS is a trademark of MICROSOFT inc.

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1 TEST SET EXPLANATION

1.1 CONNECTION TO THE RELAY AND POWER -ON

At first, be sure that the main control knob (6) is turned (rotated)

to the zero position (complete counter-clockwise). The reason is

that the current generator is actually a high current voltagegenerator. If the output is connected to the load (typically low

impedance), as soon as the test is started, a very high current

can circulate in the circuit.

Next connect the mains supply cable to the instrument and then

to the supply. THE SUPPLY VOLTAGE MUST BE THE SAME ASINDICATED ON THE PLATE.

Power-on T 1000 PLUS: a diagnostic sequence controls:

. Key microprocessor board components;

. Auxiliary supply voltages.

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. Fuse on the mains supply.

. Thermal NTC sensor on the main and auxiliary transformers. In

case of over-temperature, an alarm message is displayed.

. Thermal sensors on the SCR that controls current injection, and

of the internal temperature. In case of over-temperature, an

alarm message is displayed.

1.2 TEST CONTROL

The T 1000 PLUS front panel is explained in next paragraph.

T 1000 PLUS generation is controlled by the two keys < (55) and> (56).

Settings and menu selections are controlled by the multi-function

knob with switch (22): see next paragraph for menu selections

description. At power-on T 1000 PLUS generation is OFF, as

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according to selections; Vdc aux is generated. In this condition,

any trip of Stop input is ignored.

. ON: timer starts; main outputs are generated; Vac aux has thefault value; Vdc aux does not change. In this situation any trip at

Stop input is detected; it is possible to verify and memorize the

relay threshold, both trip and reset. As the relay trips, the TRIP

LED (43) turns on for 5 seconds; during 5 seconds, parameters at

trip are displayed; then, the standard measurement is restored.

Test results can be saved according to Save selections.. From OFF to ON + TIME: main outputs are generated and thetimer starts according to selections; as Stop trips or resets, T

1000 PLUS returns to OFF, the TRIP LED (43) turns on and

parameters at trip are displayed until ON or ON+TIME are

selected. Test results can be saved according to Save selections.

. From ON to OFF + TIME: main outputs are removed the timerstarts according to selections; as STOP is sensed, T 1000 PLUSreturns OFF, the TRIP LED (43) turns on and parameters at trip

are displayed until ON or ON+TIME are selected. Test results can

be saved according to Save selections.

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. Trip + pulse time: the timer measures the delay and the

duration of the trip impulse.

. Reclose test. It is possible to select via menu the test of areclosing scheme. Two selections are available, according to the

type of recloser under test.

In the first operating mode, T1000 PLUS is connected as follows:

Trip command to the STOP input; Reclose command to the START

input. As Reclose is detected, the test set automatically applies

FAUL

RELAY

CB

MAX TIME

0.1 s

DELAY

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FAULT 1 2

TRIP (STOP) 1 2

RECLOSE 1

(START)

TIME MEAS.

Figure 4: Measure of Delay and Reclose times

The second operating mode refers to pole mounted CB’s. In this

mode, there is only one signal coming from the device under test:

the position of the CB. In this mode, the operation is the

following.

D1 R1 D2 R2

TD

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. Timed: in all modes (ON; ON+TIME; OFF+TIME), fault outputs

are generated for the programmed maximum time; after this, T

1000 PLUS returns OFF. Any trip after this time is not sensed.. External. This mode allows for the synchronization of more T

1000 PLUS: they start generating upon reception of the START

input, that is selected in External mode.

. OFF delay: fault parameters can be maintained for the specified

time after relay trips: this allows simulating the circuit breaker

delay.

Test power selection: it allows reducing the available power; this

increases the adjustment sensitivity for low current tests on low

burden relays.

Save selections:. No automatic saving.

. Automatic test data saving as relay trips. A pop-up window

confirms the saving and tells the test number.

. Test data can be saved after confirmation. After relay trip,

pressing the multi-function knob the operator can save the test

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40 12 1.6 3.2

20 2.6 5.2

30 4 840 5.2 10.4

60 7.8 15.6

80 10.5 N.A.

10 5 2.2 4.4

7.5 3.3 6.6

10 4.4 8.815 6.6 13.2

20 8.8 N.A.

NOTE: with the supply of 115 V, the current sunk at maximumcurrent outputs is too high; so, these outputs are not available.

2) MAXIMUM POWER 60 VA

RANGEA AC

CURRENTOUTPUT

A

MAXIMUMPOWER

VA

LOADTIME

s

RECOVERYTIMEmin

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. Select by the push-button (57) the measurement on the desired

output sockets (13), according to the maximum current to be

generated: the LED turns on; the AC voltage value is displayed.. Connect the relay to be tested to sockets (13). Consider that for

tests of 40 A up it is necessary to connect the relay by a wire

having at least a cross section of 10 sq. mm; for lower currents, a

cross section of 2.5 sq. mm can be used.

. Press ON and adjust the output current to the desired value with

knob (6).. After you have started the test, if the burden is a short circuitmade of a short cable, you measure at zero knob position a

current that usually is less than 3% of the range. This value doesnot influence at all the measurement of the current you aregenerating: it is not an error of the measurement

instrument. If the current is a problem, select the 60 VA power,and/or connect resistors in series.. There are two more possible problems: the desired current

cannot be reached; the adjustment is difficult because the current

is reached too easily.

.. If it is impossible to reach the desired value, this is because the

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1.4 AC VOLTAGE GENERATION FROM MAIN OUTPUT

If the current of 3.5 A is exceeded on main AC voltage output,the generation is interrupted, and the operator is warned by an

alarm message.

This generator serves for the test of synchronism relays, where

two voltages are necessary. The procedure is the following.

. At first, be sure that the main control knob (6) is turned

(rotated) to the zero position (complete counter-clockwise).

. Power-on T 1000 PLUS.

. Select by the push-button (57) the measurement on output

sockets (60): the LED turns on; the AC voltage value is displayed.

. There are two ranges available: 250 V (full power); 57 V(reduced power). The default at power-on is full power; if 57 V

are enough, for a better adjustment, reduce the voltage as

follows.

TEST CONTROL > TEST POWER (Power) ESC. Adjust the output voltage to the desired value with knob (6).

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. Select by the push-button (57) the measurement on output

sockets (61): the LED turns on; the DC voltage value is

displayed.. There are two ranges available: 300 V at 300 W continuous (full

power); 68 V at 60 W continuous (reduced power). The default

at power-on is full power; if necessary, reduce the power as

follows.

TEST CONTROL > TEST POWER (Power) ESC

. Adjust the output voltage to the desired value with knob (6).. Connect the relay to be tested to sockets (61). Check that the

adjusted voltage does not drop as you connect the relay; else,

this would mean that T 1000 PLUS is overloaded (or that you are

connecting to a live wire). In this situation, remove the cause of

error and connect again.

1.6 AC VOLTAGE GENERATION FROM THE AUXILIARY OUTPUT

The auxiliary AC voltage is used to test relays that need voltage

and current at the meantime. In this situation, the voltage is

continuously generated; usually, it is adjusted to the nominal

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RANGE @50 Hz

VMAX @15 Hz

POWER @15 Hz

VMAX @33.3 Hz

POWER @33.3 Hz

V V VA@VOUT

V VA@VOUT

65 25 8 @ 22.5 V 55 35 @ 55 V

130 50 12 @ 45 V 110 35 @ 110

V

260 100 15 @ 90 V 220 35 @ 220

V

DO NOT EXCEED THE MAXIMUM VOLTAGES OF THE ABOVE

TABLE: THE OUTPUT WOULD BE DISTORTED!

. The operating mode is pre-selected as Fault: do not change it.

Do not change also the pre-selected frequency, as Locked tomains. Last, set the desired current phase angle; however, to

perform this, T 1000 PLUS must be ON, and some current must

circulate. Selections are performed as follows.

AUX VAC/VDC > Aux Vac control > Range > (Range) RET

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pre-fault voltage, that simulates the situation prior to fault, and

the fault voltage.

The pre-fault voltage adjustment is performed by the control

knob, while knob (20) adjusts the fault value. Voltage output

selection is automatic: pre-fault voltage with test stopped; fault

voltage with test started. The switch from a value to the other

one is performed without falling to zero. The main current or

voltage is generated at the zero crossing; the fault one isgenerated at the meantime of main voltage or current. The

selection of the reference is performed automatically, following

the selection of main output measurement. If the main DC

voltage is selected the reference is taken on the main AC voltage.

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AUX VAC/VDC > Aux Vac control > Frequency > Adjust >(Frequency value) ESC

The angle adjustment is performed as explained above; the

difference is that the adjustment is applied only when T 1000

PLUS is ON; with the instrument OFF, the pre-fault voltage is

normally in phase with the current. It is also possible to phase

shift the pre-fault voltage with respect to the fault voltage. This

parameter is necessary during the test of distance relays, whenphase to phase faults are simulated: as test starts, the auxiliary

voltage changes amplitude and phase with respect to the pre-

fault value.

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As test starts, the frequency goes to the pre-set frequency, and

from that value starts increasing or decreasing with the pre-set

ROC.

NOTE: The auxiliary AC voltage is protected by an electronic

circuit that stops the voltage generation and opens the

connection to outputs socket in case of overload (short circuit

included). In case of intervention, an alarm message is displayed.

Via the control knob the operator can reset the alarm and closethe relay to restore operation.

The auxiliary AC voltage is also protected by a thermo switch that

intervenes in case of over-heating. In case of intervention, an

alarm message is displayed.

1.7 DC VOLTAGE GENERATION FROM THE AUXILIARY OUTPUT

The second auxiliary generator can be used to supply the

auxiliary DC voltage for the relay to be tested. To this purpose,

the voltage is available at sockets (63), after pressing the push-

f

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relay; else, this would mean that T 1000 PLUS is overloaded (or

that you are connecting to a live wire). In this situation, if it is not

a connection error, it is possible to reduce the voltage until thevoltage does not drop: relays tolerate a wide range of DC supply

voltages.

The auxiliary DC voltage is protected by a current limiter. The

user notices the low voltage and removes the overload. The fuse

protects the case of counter-feed.

1.8 AUXILIARY CONTACTS

- The two auxiliary outputs have make and break contacts, that

close (open) at test start after the programmed delay, and open(close) as current is cut off after the STOP input is sensed.

Contacts can be used to simulate the circuit breaker state.

- Possibility to delay the auxiliary contacts switch with respect to

test start. Delay range: from 0 to 999.99 s.

DOC MIE92093 R 1 34 P 25 f 108

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. For both inputs, when the input is closed or with voltage an LED

turns on;

. When the relay intervenes the TRIP light turns on;. Inputs protection: if the voltage free input is selected and a

voltage is applied, no damage occurs, provided that the voltage is

within the specified limits.

. When the input is with voltage, it is possible to select the

voltage threshold. Low threshold is for voltages between 24 and

48 V; high threshold is for voltages above 100 V .

The timer offers a number of possible selections to permit many

different types of testing depending on the selection by the

operator. The following flow shows all possible selections.

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the corresponding energy (if selected). The selection is performed

as follows:

TIMER START/STOP > STOP > External > Count > (numberof counts) ESCIf the count is selected on START, time measurement will be

performed after the set number of counts has expired: this serves

to pass the start-up of the energy meter.

Input thresholds. When the contact has voltage applied, twothresholds can be selected. The low setting applies to nominal

voltages of 24 and 48 V; the high setting to 110 V up. The

selection is performed as follows:

TIMER START/STOP > STOP > External > Clean-voltage >Voltage threshold ESC

Time can be metered as seconds or cycles (second is the default).

The selection is performed as follows:

TIMER START/STOP > Units > s or Cycles ESC

DOC MIE92093 Rev 1 34 Page 27 of 108

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1.10.2. First threshold trip and drop-off

The first session is finding threshold I>, that is the limit between


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1.10.3. Second threshold trip and drop-off

The second session is finding threshold I>>. The problem is thatthe test result criterion is no more to find the limit between no

trip and trip; it is instead to find the limit between two different

timings: what we have shown as t>, for currents less than I>>,

and t>> for currents more than I>>. There are many ways to

perform the test; we suggest taking advantage of the Timed

generation option, as follows.

. Start from a current more than I>; select ON+TIME, and check

for time response. Take note of the timing t>. Compute tmax as

80% of t>.

. Set the maximum test duration as tmax: the relay will not trip

until you enter the I>> zone.. Select ON+TIME, and start the test: the test goes OFF with no

message. Slowly increase the test current and repeat the tests,

until the relay trips within tmax: this is the threshold; pressing

the multi-function knob tripping values can be saved.

NOTE: this procedure applies to any multi-threshold relay,


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. Under-current relay trip delay: from ON to OFF+TIME;

. Under-current relay drop-off delay: from OFF to ON+TIME.

All these tests are performed after having pre-adjusted the

desired test current (or set of parameters).

I

t

5A) Overcurrent relay trip delay

I

Stop

FAULT

Trip delay


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. Now, press ON and pre-adjust the first set of fault parameters:

as the relay trips, don’t save test result; go OFF.

. Select ON+TIME: as the relay trips, test goes OFF; pressing themulti-function knob tripping values can be saved. The TRIP LED

(43) turns on and parameters at trip are displayed until ON or

ON+TIME are selected. Confirm save results pressing the multi-

function knob, and proceed with other test currents, until all

points to be tested are measured.

Now we can measure the drop-off timing.

. First thing, select the NC level for the relay reset contact:

. Now, press ON and pre-adjust the same set of fault parameters.

. Select OFF+TIME: as the relay resets, pressing the multi-

function knob drop-off values can be saved. Confirm save results

pressing the multi-function knob, and proceed.

With different test values, other timings can be measured.

1.12 TEST RESULTS HANDLING

Before performing a test, it is important to program the test


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The operation to input the header is the following.

After having entered, if you move the knob it will move

between: arrow up; Plant name; arrow down, Return.

If you press the arrow up or down, you will scroll through:

Plant name, Operator, Serial number, Model/manuf.,

Feeder.

Once you have reached the desired description, select it

and press: the description goes in reverse, and you can

edit it.

The editor is performed as follows. If you turn the knob, it

will reach a number of selections in the bottom, and then

the line with the alphabet letters; at the end of this, there

is a double arrow, that, if pressed, replaces letters with

digits.

The input is performed reaching for a letter with the knob,

and pressing it: the letter is copied into the description.


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sure to save the correct data. Save is performed both in ON mode

and in ON+TIME mode.

With the selection Manual, it is possible to save data at any time,

pressing MENU and then Yes, even if the relay did not trip. As

already explained, a threshold is verified with two tests: with a

value the relay trips, with a slightly different value the relay does

not trip. This is to be selected when you are looking for the no-

trip limit of a threshold.

Once results are saved, it is possible to review or to delete them

with the command Results > Show results. The display showsthe list of the relay serial numbers, followed by the number of

tests performed with the same header.

Pressing on the relay serial number you access a window with:

Plant name, Serial number, operator. You can: return, delete

escape. Pressing Delete, a confirmation message is displayed.

Pressing Yes, all results are deleted; pressing No, you return to

the results list.


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The easiest type of test is to check the settings. In this instance it

is sufficient to generate the relevant parameters (voltage,

current, angle) with values close to the settings. With two timing

tests, little below and little above the settings, it is possible to

test that they are correct, within a specified tolerance.

For instance, testing an over-current relay set at 10 A can be

performed with two delay tests: at 9.5 A (-10%) the relay should

not trip; at 10.5 A (+5%) it should trip; also the timing can be

tested.

A more complex and complete test is the control of the complete

characteristic curve of the relay. There are two types of

characteristic curves:

- Parameter vs. time: it displays the trip time as the parameter

changes. Examples are: current vs. time, for an over-current

relay; impedance vs. time for a distance relay. It is understood

that for currents less than the threshold, or for impedances

higher than the general starter, no trip occurs.


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g

I-t over-current relay curve

The curve means that:

. If the test current is less than I> no trip occurs;

. For current more than I> and less than I>> trip time is a

function of the test current;

. For currents more than I>> the trip time is t>>.

t

I

t>>

I> I>>


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g

keeping the other one constant. However, we must be careful

before executing the test.

I-V directional relay curve

For instance, in order to find the point A it is apparent that the

procedure is:

V

IImin

Vmin

A

B


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The area to the right is the trip zone; to the left it is the no tripzone. The test strategy should be the following:

. For points A, B, D: set the test voltage and increase the current

until the relay trips;

. For point C, set the test current and decrease the voltage until the relay trips

V

I

A

I V 0

V M I N

V N

I V N

B

C

D


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The area of intervention is the one within the circle with the

centre in the negative X axis. The first problem is to convert R

and X into the corresponding V, I, angle; then, the current isset at IN, and only voltage and phase are modified. The test isperformed as follows:

. For point A, set the angle at 270°, start from V=0 and increase

V until the relay trips;

. For point B, set the angle at 270°, start from V higher thanthe setting and decrease V until the relay trips;. For point C, set for V the average of A and B, start from an

angle greater than 270° and reduce it until the relay trips. In a

similar way, for D, start from an angle smaller than 270° and

increase it until the relay trips.

. For other points, you have to decide whether to take the angle

constant and change the voltage or vice versa; you should choose

the variation that is not tangent to the characteristic curve.

1.14 USE OF THE TEST SET AS A MULTIMETER

The test set can be used as a powerful multimeter, as it allows

measuring:

Voltage AC and DC;


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. The frequency is measured only on the voltage input: connect it

and select the F measurement.

. The measurement of the impedance or of the resistance of a

component fed by an external source is performed as follows.

.. Open the circuit, and connect the component to the

external current measurement;

. Connect the component terminals to the external voltage

measurement: this avoids errors caused by the connection

leads and by the current measurement circuit;

. Select the desired measurement (Z+ φ, or R+X);

. Close the circuit, taking care not to exceed the current

limits. The measurement does not change as soon as current

and voltage are high enough: this confirms the correct

measurement.

. For power measurements of an external source proceed as

follows... Open the circuit, and connect the component to the

external current measurement;

. Connect the component terminals to the external voltage

measurement: this avoids errors caused by the connection

leads and by the current measurement circuit. Take care not


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N. PARAMETER , ACINPUTS

DERIVEDFROM

FORMULA UNITS

1 ACTIVE POWER, P Iext, Vext;

φ

P = I*V*cos

(φ)

W

REACTIVE POWER, Q Iext, Vext;

φ

Q =

I*V*sin(φ)

VAr

2 APPARENT POWER, S Iext, Vext S= I*V VA

POWER FACTOR, p.f. φ p.f. = cos(φ) -3 IMPEDANCE, Z and φ Iext, Vext,

φ

Z = V/I Ohm,

°

4 ACTIVE IMPEDANCE

COMP., R

Iext, Vext;

φ

R = Z*

cos(φ)

Ohm

REACTIVE IMPEDANCE

COMP., X

Iext, Vext;

φ

X = Z*

sin(φ)

Ohm

5 FREQUENCY, F Vext - Hz

6 PASE ANGLE, IE TO V2 Φ, IE-V2;

ref. V2

- °

PASE ANGLE, VE TO V2 Φ, VE-V2;

ref. V2

- °


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Hz: these values are higher than those of the standard T1000

PLUS.

RANGE @50 Hz

VMAX @15 Hz

POWER @15 Hz

VMAX @33.3 Hz

POWER @33.3 Hz

V V VA@VOUT

V VA@VOUT

3 1.8 20 @ 20 A;

14 @ 10 A

3.2 40 @ 20 A;

25 @ 10 A

65 35 8 @ 35 V 65 45 @ 65 V

130 70 14 @ 70 V 130 35 @ 130

V

260 140 30 @ 140

V

260 35 @ 260

V

1.16 FILTERING HEAVY BURDEN DISTORTION WITH THE FT1000 OPTION

Some very old electromechanical relays may have very inductive

loads, which change in value during the test. As the test set


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Next, all you have to do is to connect FT1000 in series to the

T1000 selected output: the FT1000 range shall be the same or

greater than the one of T1000.


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2 TEST SET AND POP-UP MENU

2.1 THE FRONT PANEL


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The following list includes the key components inside T 1000

PLUS; see the schematic on last page.

1) Main supply fuse, rated T10A, incorporated in the supply

socket.

2) Power-on switch.

6) Main outputs adjustment.

8) Earth socket.

13) Output sockets for main current output.19) Auxiliary DC voltage fuse, F2A.

20) Adjustment of auxiliary AC voltage output.

21) Adjustment of auxiliary DC voltage output (not available on

the model TD1000 – 15 Hz).

22) MENU control knob, with switch.

23) Display.24) Resistors set.

31) Internal START selection light.

32) Normal Open START selection light.

33) Normal Closed START selection light.


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52) OFF + TIME light: current is removed and time metered until

STOP is detected.

53) Main AC voltage selection light.

54) Main DC voltage selection light.

55 and 56) START and STOP push-buttons.

57) Push-button for the selection of main output.

60) Main AC voltage safety sockets.

61) Main DC voltage safety sockets.

62) Auxiliary AC voltage (also current on TD1000) safety socketsand light: ON = output available.

63) Auxiliary DC voltage safety sockets and light: ON = output

available.

64) Sockets for the connection to the external Start input.

65) Sockets for the connection to the Stop input.

66) Auxiliary outputs Normal Open and Normal Closed contacts.67) External current meter safety sockets.

68) External voltage meter safety sockets.

69) Auxiliary DC voltage ON-OFF switch.

70) Auxiliary AC voltage ON-OFF switch.

71) USB interface connector.


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After power-on, the auxiliary AC voltage is available at sockets

(62) after pressing the push-button (70), and can be adjusted

with the knob (20). Also the auxiliary DC voltage is available atsockets (63) after pressing the push-button (69), and can be

adjusted with the knob (21).

When the menu is accessed, the measurements are displayed

without the headings. If some further measurement is selected

(external measurements, power..) they are displayed below themenu, and only while the menu is not accessed.

2.3 THE POP-UP MENU

The following is the list of features that are menu selected. The

menu is operated by means of the control knob marked MENU,

that incorporates a switch. The menu is entered pressing the

knob and selecting the item moving the knob. Once the item has

bee found and programmed, pressing the arrow the menu moves

back of one step, so that other programming can be performed;

else selecting ESC the menu returns to the main window


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The flux diagram of menu selections can be found in Appendix 1.

LEVEL1 LEVEL 2 LEVEL3

LEV. 4 FUNCTION

TEST

CONTROL

Test

mode

Normal

(default)

Measures the time

delay from START

(internal, external) to

STOP (internal,

external).

Trip + pulse

time

Measures the time

delay from START

(internal, external) to

STOP (internal,

external), and the

duration of STOP.

Reclose

mode

TD;

No

Two delays are

measured: fault to


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External Generation starts

upon reception of the

START input: this

allows synchronising

T 1000 PLUS. When

selected, the fault is

injected as soon as

the selected

condition on START

input is met.Timed Max

time

Generation lasts for

the pre-set time

duration. Max time

999 s.

OFF

delay

T delay The main output OFF

is delayed by the setamount of time or

cycles.

Output

power

300 VA

(default) – 60

VA

Selection of full (300

VA) or reduced (60

VA) power


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TIMERSTART/STOP

Start INT (default) Timer starts when ONor ON+TIME are

activated and outputs

generated.

EXT NO-NC-

EDGE

After ON or ON+TIME,

timer starts on the

external input. External

START input Normally

Open, or Normally

Closed, or Both(EDGE).

CLEAN-

24 V – 80

V

After ON or ON+TIME,

timer starts on the

external input. External

START input without or

with voltage. If withvoltage, two voltage

thresholds are

available: 24 or 80 V.

COUNT Timer enters the

counting mode; it is


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CLEAN-

24 V – 80

V

Timer stops when the

STOP input is detected.

External STOP input

without or withvoltage. If with

voltage, two voltage

thresholds are

available: 24 or 80 V.

COUNT Timer enters the

counting mode; it ispossible to program

the number N of

transitions to be

detected. After ON or

ON+TIME, the time

from the first validinput to input N+1 is

measured; the

corresponding energy

can be read on the

display.


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LEVEL1

LEV.2

LEV.3

LEVEL4

LEVEL 5 FUNCTION

AUX

VAC/VDC

Aux

Vaccontrol

Range 65 (default) ;

130 ; 260 V.

Mode Fault (default) The auxiliary

AC voltage is

adjusted by

the dedicated

knob, and is

available afterpressing the

ON-OFF

pushbutton. If

the auxiliary

voltage should

be appliedalong with the

main current

or voltage, go

to next

selection


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Prefault

+ Fault

Prefault

Amplitud

e

Sets the pre-

fault auxiliary

AC voltage

amplitude.Entering this

selection in

OFF mode, the

pre-fault

voltage is

generated anddisplayed, and

adjusted by

the multi-

function knob.

NOTE: the

fault voltage isgenerated

pressing ON or

ON+TIME, and

it is adjusted

as usual by the


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Prefault

duration

Sets the

duration of the

pre-fault

auxiliaryvoltage. When

ON or

ON+TIME are

pressed, the

pre-fault will

be generatedat the mains

frequency for

the selected

duration; then

the fault

voltage isgenerated, at

the

programmed

frequency.

Prefault The prefault


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Adjust

freq

40-

500.00

0

The frequency

of the auxiliary

voltage may be

programmed.Frequency

changes at test

start; output

voltage does

not change in

amplitude.Adjust

r.o.c.: 0.01..

9.99

Hz/s

The frequency

ramps at the

programmed

rate of

Change. The

startingfrequency can

be the mains

or the value

set by adjust

freq.


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Adjust phase Vaux

- mains

The fault

auxiliary

voltage can be

phase shiftedwith respect to

the mains. The

measured

angle is

displayed. Test

must be ON;for a correct

angle

measurement,

the auxiliary

voltage must

be more than20% of the

range. Phase is

adjusted by

the

multifunction


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Adjust phase Vaux

– I main

The fault

auxiliary

voltage can be


the main

current. The

measured

angle is

displayed. Testmust be ON;

for a correct

angle

measurement,

current and

voltage mustbe more than

20% of the

range. Phase is

adjusted by

the


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Adjust phase Vaux

– V main

The fault

auxiliary

voltage can be


the main

voltage. The

measured

angle is

displayed. Testmust be ON;

for a correct

angle

measurement,

both voltages

must be morethan 20% of

the range.

Phase is

adjusted by

the


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LEVEL1 LEVEL 2 LEVEL 3 LEVEL 4 FUNCTION

METERS Internal Units of I Normal If selected,current

values aredisplayed in

A.

I/IN I

If selected,

displayed

values are

defined asI/IN, that

can be

defined.

Units of V Normal If selected,

voltage

values aredisplayed in

V.

V/VN If selected,

displayed

values are


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10A – 20

mA

Selects the

current

input socket

Waveform If selected,the current

waveform is

displayed

External V

Enabled AC

(default) -

DC

With

selection AC

the meterperforms

the true rms

measureme

nt; with

selection

DC, themeasureme

nt is

performed

on the

average


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LEVEL1 LEVEL 2 LEVEL 3 FUNCTION

METERS

(continued)

Other

internal

None (default) No extra

measurementdisplayed

Active power P; W

Reactive power Q; VAr

Impedance module Z, Ohm

Impedance argument φ, °

Active impedancecomponent

R, Ohm

Reactive impedance

component

X, Ohm

Apparent power S; VAPower factor p.f. = cos(φ V-I)

Active energy (AC) Ea; Wh

Reactive energy (AC) Er; VArh

Other

externa

None (default) No extra

measurement


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Note: measurements marked AC apply only if both inputs are

selected as alternate current.

LEVEL1 LEVEL 2 LEVEL 3 LEVEL4

FUNCTION

RESULTS Test header Groups results

Show results Display result

Delete Selectedresult(s)

All resultsCONFIGU-

RATION

Settings Save to

address

1..10 Saves current

settings to X

Restore

address

1..10 Restores settings

from X

Restore

default

1..10 Restores default

settings

Language UK, FR, SP, PT,GE, IT

Select the desired

language

Display Speed Slow The displayed

value is refreshed

every 1000 ms


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3 WHAT’S INSIDE?

3.1 PHYSICAL DESCRIPTION

The test set is contained in an housing, to which it is fixed by

means of nine screws that are located below it: see the following

picture.


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16) C b d d PWA11401

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16) Converter board code PWA11401.

17) Front panel board; code PWA11398.

24) Resistors set.

26) MISU T 1000 PLUS board code PWA11402.27) Protection fuses board, code PWA11416.

The arrangement is shown in the figure and pictures below.


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Thei location is sho n in the d a ing belo Ca ds a e kept in

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Their location is shown in the drawing below. Cards are kept in

place by the piece of aluminium sheet on the right, and also by

the threaded bar between the boards. If a board is failing, it is

necessary to remove the two screws as shown, and to un-tightenthe nut of the threaded bar, as shown; in case some component

touches it, it is necessary to remove it.


VOLTAGE POWER PURPOSE GOES TO

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VOLTAGEV

POWERVA

PURPOSE GOES TO

150 120 Supply of auxiliary DC voltage

module YWA11395 (9)

PWA11395

J800-1; 411.5 3 Auxiliary supply for auxiliary

DC voltage module

YWA11395

PWA11395

J800-2, 3

50 60 Low power test supply 2 WAY

CONN.

36 x 2 35 x 2 Power supply of auxiliary ACvoltage board PWA11396 (10)

PWA11396J1-1; 2; 3

15.2 x 2 10 x 2 General auxiliary ± 15 V

supply for all analog circuits

PWA11399

JP 10

12 10 General auxiliary + 5 V

supply for all digital circuits

PWA11399

JP 8

10 10 General auxiliary + 12 Vunregulated supply (relays, ..)

PWA11399JP 9

4.5 7 Unregulated + 5 V supply for

the display back-light

PWA11399

JP 7

3 2 2 Auxiliary transformer XTF10245 (4)


10 1 Positive voltage for the PWA11396

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10 1 Positive voltage for the

buffer of AC voltage

board PWA11396 (10)

PWA11396

J2-4, J1-6

10 1 Negative voltage for thebuffer of AC voltage

board PWA11396 (10)

PWA11396J1- 4, 5

11.5 x 2 1.5 x 2 I measurement circuit

supply

PWA11398

J812-1, 2,

3

11.5 x 2 1.5 x 2 V measurement circuitsupply

PWA11398J812-4, 5,

6

The following drawing shows the back panel board (11) and the

JP points, where many wires are soldered.


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3.2.3 Main output transformer, XTF10345 (5)

The main output transformer (5) has the following secondary

windings. For connections, see the schematic at the end of this

manual.

VOLTAGE

V

POWER

VA

PURPOSE

225 +

296

125 Main DC voltage

Main AC voltage (same common)

90+

25+

10

400

300

300

10 A output (60 s maximum)



(same common)

3.2.4 Main front board PWA11398 (17)

The board includes many different circuits:


All circuits have: gain selections; high accuracy amplifiers;

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All circuits have: gain selections; high accuracy amplifiers;

high accuracy isolated op amps.

Analog outputs are taken to CONV1000, for the ADC

conversion.

3.2.6 CONV T1000 board PWA11401 (16)

TASK 1: to convert all analog measurement signals (the

above + main I + main V AC + main V DC + auxiliary V AC)

into digital signals. This is performed by two 12-bit, 4channels each parallel ADC converters.

TASK 2: to generate a squared waveform in phase with the

mains input, and to square the AC current and voltage signals

for the phase meter. Three circuits with amplifiers, limiters,

comparators perform this task.

TASK 3: to generate a sinusoidal waveform, with controlledfrequency and amplitude, that will be passed to the auxiliary

AC voltage amplifier (10). This is made by the local micro DSP

processor that generates the inputs for two DAC’s, that

control the amplitude and the waveform, at 10 kHz.

On the board is located a set of 8 switches; their meaning is


3.2.7 INTE ON-OFF T 1000 board PWA11400 (7)

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3.2.7 INTE ON OFF T 1000 board PWA11400 (7)

TASK 1: to detect the START and STOP inputs closed – open

situation via two isolated constant current generator circuits,with wet/dry selection and opto-isolated logic output.

TASK 2: to drive the ON-OFF of the test set. There are two

SCR’s pairs (one per phase) in opposing mounting, mounted

on heat sinks. SCR characteristics: 600 V AC; 20 A steady;

200 A peak.

TASK 3: diagnostic circuits of the main auxiliary supplies.

3.2.8 MICR T 1000 board PWA41300 (15)

The microprocessor board is the same as the one of the DRTS

family, but without the two PLA’s. It is controlling the test set

operation, test and results handling and the communication withthe PC, but not the AC waveform generation, that is controlled by

a dedicated slave microprocessor.

3.2.9 AP-50 AC Voltage board PWA11396 (10)


By the side of the boards support is mounted a board with a set

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By the side of the boards support is mounted a board with a set

of protection fuses. They protect the following modules:

. Auxiliary DC voltage supply: timed 0.25 A;

. Display backlight: timed 1.6 A;

. Internal supply + 15 V: timed 1 A;

. Internal supply - 15 V: timed 1 A;

. Internal supply + 5 V: timed 0.8 A;

. Internal supply + 12 V: timed 1 A.

The position of fuses is shown in the picture below.

The first one protects the auxiliary supply: if it is blown, there is


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J812: MAIN BOARD (17)

PIN 1 2 3 4 5 6VOLTAGE 11,5 V REF. (1-3) 11,5 V 11,5 V REF. (4-6) 11,5 V

TRANSFO (4) (4) (4) (4) (4) (4)


PIN 1 2VOLTAGE 8 V REF. (1)

TRANSFO (4) -


PIN 1 2VOLTAGE 7 V REF. (1)

TRANSFO (4) (4)



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4 THE HELL, IT DOESN’T WORK

4.1 INTRODUCTION

Sometimes, when my ears whistle, I wonder if it is because of

some of my customers being angry at us because the test set

doesn’t work: according to Murphy’s law, when it was most

necessary. We at ISA do our best efforts to filter the so-called

infant mortality of electronic components prior to delivery of allour test sets; and this after extensive testing of prototypes and

pre-production units.

Yet, sometimes faults occur, because everything dies, including

electronic components; so, please, before shooting at us, see if

the following instructions can serve you to fix the problem. If not,e-mail us the problem, not forgetting to mention the unit’s

serial number: our business is to minimize your downtime. Mye-mail address is:

[email protected]


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4.2 ERROR MESSAGES

The test set performs a number of tests at power-on and during

the generation. The following table lists all the messages, and thecorrective action.

A) TESTS AT POWER-ON (and runtime)

ERROR MESSAGE CONSEQUENCE CORRECTIVE

ACTION+ 15 V supply failure If the error is not

confirmed it is

possible to continue;

else, the test cannot

proceed

(NOTE 1)

Try some power

on – off; if

persists, three

steps:

. Check the

fuses;Try to replace

e CONV board;

. Return the

test set.

15 V supply failure If the error is not Try some power


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B) RUNTIME TESTS

ERRORMESSAGE

CONSEQUENCE CORRECTIVEACTION

60 VA IAC supply

time

The test lasted

too long; tests

are blocked for

the specified

duration

Wait until the

message disappears

300 VA IAC

supply time

The test lasted

too long; tests

are blocked for

the specified

duration

Wait until the

message disappears

IAC while VDCsupplied

Generation isstopped

The test set issensing a burden

both on main IAC

and VAC or VDC,

what is forbidden.

Remove one of the


disappears, the

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test set informs

you about the

residual timeOVERTEMP

POWER

TRANSFORMER

Generation is

stopped

(NOTE 1)

The main

transformer

temperature is too

high because of

heavy loads or very

long test duration:wait until it cools

down. If it does not

disappear, see the

text.

OVERTEMP

SCR’S HEAT

Generation is

stopped(NOTE 1)

The temperature of

the SCR that drivesthe test is too high

because of heavy

loads or very long

test duration: wait

until it cools down


The following table summarizes main faults, cause of fault and

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correction. When in the correction you find “see text”, please

proceed with the following paragraphs.

SYMPTOM POSSIBLE CAUSE CORRECTION

Problems after

transport

Heavy shock Open T 1000 PLUS

and check for

loose boards or

connections

At power-on doesnot turn on

Mains supply fuseopen

Other causes

See text

The variable

transformer gets

very hot as soon

as the test set ispowered-on

The INTE board is

faulty

Replace INTE

After the general

over-temperature

alarm message it

does not turn on

The power

transformer was

over-heated

Wait at least 30

minutes before

trying again: it

needs time to cool


Measurements are The microprocessor Go to the

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completely false has lost its

correction factors

calibration

procedure and

repeat it.The display is dark Protection fuse

blown

See text

Unstable auxiliary

AC voltage

measurement.

Fault of AC voltage

generation circuit

See text

The TRIP input isnot detected

Damaged INTE ON-OFF

See text

Over-load alarm

on the auxiliary AC

voltage cannot be

restored; AC

voltage cannot begenerated.

Fault of AC voltage

amplifier.

Contact your agent

for support,

detailing:

. test set number;

. how did it occur

A knob

(adjustment,

multi-function

wheel) does not

Friction against the

front panel

. Remove the

plastic (blue)

protection on the

front of the knob:


4.3.1 Auxiliary supplies

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On the edge of the CONV board are mounted a number of ring-

shaped test points. They carry the key auxiliary supplies, whichoperate the test set. The arrangement of the test points is the

following.

If any of these voltages is missing, the test set cannot operate: it

is necessary to find out if it is a problem of blown fuse, or repair

the auxiliary voltage circuit. If the main auxiliary transformer (3)

is damaged, it can be replaced with the following procedure.

The replacement transformer comes cabled with all crimped

connectors, in order to ease the replacement. There are eight

remaining wires that are to be soldered directly to the small fuse

board. The two transformers are perfectly identical: wires come


. three connectors from the DC voltage generator: two bigger,

hit th f t th l fl t bl

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white, one on the front, one on the rear, plus one flat cable;

. Five connectors from the AC voltage amplifier: four white,

mounted on top of the board, plus a flat cable.

After this, power-on, and verify that the display operates, and

that the LED’s on the front panel turn on with the default values.

If so, re-insert the modules one after the other, in order to detect

which one is faulty.

In case of DC voltage generator, see here below what else to do;

in case of the AC voltage amplifier, it should be replaced.

4.4 AUXILIARY DC VOLTAGE FAULT

If the output voltage cannot be adjusted, then the fault can belocated in the adjustment potentiometer. In this instance, the

behaviour is the following:

- Select the 130 V range: the output is fixed at about 10 V;

- Select the 240 V range: the output is fixed at about 20 V.


4 wires with

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If the potentiometer was not the problem and fuse (19) is OK, it

is possible that the fuse on the fuses board is blown, or that one

of the fuses mounted on the board has blown up. In this instance,

proceed as follows.

Open the test set as explained above and locate the fuse on

the same colour

4 wires withdifferent

colours:they comefrom thetransformer


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The last test is to remove the connector J800 coming from the big

F1F 3.15 A

F2F 2 A


4 5 AUXILIARY AC VOLTAGE FAULT

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4.5 AUXILIARY AC VOLTAGE FAULT

Possible modes for AC voltage fault are:. Over-load message at power-on, that cannot be re-set;

. Over-load message even with a minimum load;

. No AC voltage output.

In such instances, the most likely cause of fault is the amplifier

(10), PWA11396. You should open the test set, disconnect thefive connectors, remove the amplifier by unscrewing the four

screws below it, replace with the new one and verify that the test

set is operational. In order to be able to remove the amplifier,

first remove the DC voltage module (two screws), so that you can

take it away moving it to the left.

When fitting back the connectors, cables are short or with

different pin numbers, so that they cannot be exchanged, unless

for two 6-way connectors towards the bottom of the test set. The

correct location is sketched below (see the picture above)


PIN 1

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. Verify the signals as summarized in the following table.

PIN 1 2 3 4 5 6 7

SIGNAL Extmeas

80 V

0 Vin 0 Vin0-2 V

AC

Rangesel

H = 260

+ 12 V Extmeas

10 V

PIN 2


follow the instructions above for the opening of T 1000 PLUS and

board replacement

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board replacement.

4.7 DOES NOT MEASURE THE MAIN CURRENT

Remove T 1000 PLUS from the container. Just below the output

sockets there are two yellow wires going to the metering current

transformer. These yellow wires are made of a single enameled

wire coming from the secondary of the measurement

transformer: it is possible that they broke, and so you loose themeasurement. The fixing is easy: just solder the wires, taking

care to peel the enamel so that it can be soldered.

If this is not the cause of the problem, further tests:

. On the main board, close to the point where the transformer is

soldered, is located the resistor R71, rated 1 Ohm: verify that it iscorrectly soldered.

. Generate 1 A on the 10 A output, and measure the voltage

across the 1 Ohm resistor: you should measure 50 mV

(Transformer ratio 200//1; 10 turns make the ratio 20//1).

The voltage drop across the shunt is taken to the CONV board


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. Verify the voltages on the test points of the CONV board, as

explained above. If some voltage is missing, then the auxiliary

transformer should be replaced.

. The display is connected to the main front board via a number

of pins, located in the center of the display: verify that there is no


4.9 THE AC VOLTAGE MEASUREMENT IS NOT STABLE

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4.9 THE AC VOLTAGE MEASUREMENT IS NOT STABLE

First of all, check that there is no unplugged connector or brokenwire. Next, it is necessary to understand if the problem is in the

measurement or if the output is actually unstable. To this

purpose, connect the output to an AC voltage meter and verify

the reading. If it is unstable as well, the problem is in the

amplifier; otherwise, it is in the measurement circuit.

In the first instance, amplifier, we have to verify if the problem

comes from the adjustment potentiometer. To this purpose,

proceed as follows:

. Go to the menu and select PREFAULT + FAULT;

. In the PREFAULT mode, the output voltage is adjusted by the

multi-function knob, and not by the potentiometer: please verifythe output. If it is stable, the problem is located in the

adjustment knob. If it is unstable, it can be located on the AP/50

amplifier, or on the CONV board. The problem when replacing

CONV is that, as it hosts the measurement circuits, after

replacing it it is necessary to repeat the calibration It is up to


contact closes, a current of about 10 mA flows though it and

detects the contact status. If with this selection the closed contact

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is not detected, and 20 V are not applied, the fault is located in

the INTE ON-OFF board (7), that is located in the boards pack.The replacement is very fast: just follow the instructions above

for the opening of T 1000 PLUS and board replacement.

If the replacement of the INTE ON-OFF board is not solving the

problem, check the following.

. There are two connectors on the front board: they carry theSTART and STOP inputs. Check that they are OK.


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. Last, on the test points shown above as STOP SUPPLY andSTART SUPPLY are soldered the wires that supply the START and

STOP circuits for the voltage free selection, and that come from

the auxiliary transformer located below the boards: if a voltage is

missing, the transformer should be replaced.


- Remove (or unlock a little) the metal bar that fixes the two

aluminium columns.

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- Remove the two connectors placed on the INTE board.

- Remove the INTE board, and then the pack MICRO + CONV.- Open the pack MICRO + CONV.

- Change the position of the mini-dip switch N. 8 on the CONV

board (it is OFF; it must be set ON).

- Insert again all the boards (and the INTE connectors too).

- Turn on the test set.

- At this point , the instrument should be connect to your PC.Execute the firmware download.

Verify that the new firmware version appears; if yes, you have

to turn off and set the dipswitch N. 8 to OFF (as it was initially).

4.12 THE ENCODER IS BROKEN

In this instance, it is necessary to have some skill and patience.

The procedure is the following.

. During the time, we have used three different type of encoder

mounting; they are:

1 The front-end printed circuit board does not allow to


. Unsolder the first wire, and solder it to the new encoder, in the

same position: with this procedure you are sure not to exchange

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wires.

. At the end of soldering, mount back the new encoder, power-onand check that it is correctly operational. After this, complete the

mounting of the test set.

4.13 THE THERMAL ALARM DOES NOT DISAPPEAR

The thermal alarm is given by either of two thermal switches putin series: one is located on the main transformer; the other one is

located on the AP-50 amplifier. One of them is faulty.

In order to understand which one is faulty, proceed as follows:

. Dismount the AP-50 amplifier (four screws from below), and lift

it enough to reach for the thermal sensor: it ends with two wires,that go to a connector.

. Disconnect the connector, and perform a temporary short circuit

on the mating connector.

. Power-on. If the error signal disappears, the fault is on the AP-

50 sensor (unless AP-50 is actually hot); else the fault is on the


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. The fuse to the right protects the auxiliary contact no. 1.Replace the fuse and verify again.

. If the fuse is not the problem, it is possible, even if quite

difficult, to unsolder the relay and to replace it.

4.15 THE FAULT CANNOT BE FIXED

If the fault is too hard to be fixed, you have to deliver T 1000

PLUS back to your agent. We have encountered problems caused

by a poor packing of instruments that have been delivered us for

calibration or repair. In order to avoid such inconveniences,

please apply the following procedure


INSTRUMENT RETURN FORM

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DATE ________________________________________AGENT _______________________________________COUNTRY _____________________________________

TYPE OF INSTRUMENT __________________________SERIAL NO. ___________________________________

INSTRUMENT RETURNED FOR:CALIBRATION ____REPAIR ____

In case of repair, please specify the following.

DATE OF FAULT _________________________________REPORTED BY E-MAIL, PHONE ______________________


HOW DID IT OCCUR _______________________________________________

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_______________________________________________

_______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________

LOCAL ANALYSIS OR ATTEMPTS TO REPAIR _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________


4.16 CALIBRATION

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4.16.1 Introduction

T 1000 PLUS does not need to be calibrated, as metering circuits

employ high stability components.

It is suggested to check the unit every 2 years, by comparing T

1000 PLUS measurements to external meters. Tests should beperformed with an high accuracy multi-meter, that shouldguarantee a maximum AC measurement error of 0.1%, both for

voltage and current. Besides, as such multi-meters do not have

current ranges greater than 2 A, for the test of the high current

ranges it is necessary a class 0.1 measurement Current

Transformer. The adoption of lower-class instruments may causefalse interventions, that introduce errors into the test set. . Last,

as internal generators follow the mains, it should be stableenough to allow for a stable generation.

At the end of the test if deviations are not acceptable it is


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4.16.3 T 1000 PLUS output calibration

Calibrations are divided between external measurements and

internal generators. Starting from an internal generator, for

instance Main IAC, the following window is opened.


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. The first thing is the off-set calibration: to this purpose, remove

the connection to the meter, then select RESET: as you click on

it, the square dot to the left side turns white:

. Now, press SET: the square dot turns black, and the calibration

is done.

. On the upper part of the screen it is displayed the nominal

current to be used for the calibration of the selected range: in our

instance it is 1 A To the right there are two adjustment


. Next is the calibration of the AC voltage output: the window is

the following.

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.

. Here there are four ranges to calibrate. The procedure is the

same as above, but the off-set is calibrated by putting a short

circuit on the output.

. The main DC voltage output is similar to the above. The

auxiliary AC voltage output calibration opens the following screen.

DOC. MIE92093 Rev. 1.34 Page 100 of108

Now you can proceed with the external measurements

calibration. For this operation, IT IS NECESSARY TO HAVE AN

EXTERNAL SOURCE SUCH AS A DRTS TEST SET: T1000 ittself

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EXTERNAL SOURCE, SUCH AS A DRTS TEST SET: T1000 ittself

cannot be used to source the inputs.

. The window for the external IAC measurement is the following

one.

. NOTE: the first two calibrations will be performed on the 25 mA

input; the other two on the 10 A input. Also here, first calibrate

the offset (open circuit, and then the gain, inputting a currentclose to the one displayed.

. Calibrations are divided in two: AC calibration and DC

calibration. The following is the widow for the 600 V input.


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1) Angle Auxiliary AC Voltage (reference) – Main AC

current.

Once the selection is performed, the following window is opened.

The calibration has to be performed for each voltage and current

range: nine calibrations in all. Connect the auxiliary AC voltage

output to input 1 of the reference phase meter, and the main

current output to input 2 of the reference phase meter. Take


A sockets: the auxiliary AC voltage will be the same for all

ranges.

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2) Angle Auxiliary AC Voltage (reference) – Main Voltage.Once the selection is performed, the following window is opened.

Connect the auxiliary AC voltage output to input 1 of the

reference phase meter, and the main AC voltage output to input

2 of the reference phase meter. Take care to connect theT1000 black sockets to the negative inputs of the phasemeter.

Both voltage outputs are adjusted at 57 V. on the 62.5 V range,

and the main voltage output, The adjustment procedure is the

same described above.


resistor set. Press the key >, and adjust 1 A for the first

calibration, and 5 A for the second one. The procedure is the

same as above

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same as above.

4) Angle Auxiliary AC Voltage (reference) – ExternalVoltage.

Once the selection is performed, the following window is opened.

Connect the auxiliary AC voltage output to input 1 of the

reference phase meter, and the external AC current input to

input 2 of the reference phase meter. Take care to connect theT1000 black sockets to the negative inputs of the phasemeter.


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With this connection, the voltage to VEXT is about 10 V when the

input is 65 V: this is to be used for the angle calibration of the 20

common


APPENDIX 1 SPARE PARTS LIST

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The following is the suggested list of spare parts for a duration offive years and for up to five test sets.

The reference is made to the list of components.

1) N. 10 Fuses in the supply socket (1), rated T10A, code

XFU22101.2) N. 10 Fuses of the auxiliary DC voltage (19), rated F2A, code

XFU23109.

3) N. 1 DC to DC converter for the display (23) backlight, code

XCA10348.

4) N. 1 Encoder with switch, for MENU control knob (22), code

XCM10160.

5) N. 1 Printed circuit board INTE ON-OFF (7), code PWA11400.

6) N. 1 Auxiliary DC voltage supply module (9), code YWA11395.

7) N. 1 Auxiliary AC voltage amplifier AP-50 (10), code

PWA11396.

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APPENDIX 2: MENU SELECTIONS FLUX DIAGRAM

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