abcd - myprotectionguide.com · abcd type mvax trip circuit supervision relay 01/03 service manual...
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ABCD
Type MVAXTrip Circuit Supervision Relay
01/03 Service Manual R8010L
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R8010L Service Manual
Page 6/18 MVAX
Test 6
With the circuit breaker closed, operate, or simulate operation of the associated triprelay. Ensure the CB trips but ensure that RL1 of the MVAX does not operate.The MVAX relay units are slugged on drop-off to prevent mal-operation during thetransition period.
Relay V. rating 24/27 30/34 48/54 110/125 220/250
Ref. V. for tolerance 27 34 54 125 250
Hand resetflag 7.8 – 8.2V 9.4 – 9.8V 13.6 – 14.2V 27.9 – 29.4V 55.3 – 58.4VTest 1
(Tripsupply)
Self resetflag 6.3 – 6.7V 9.4 – 9.8V 13.6 – 14.2V 27.9 – 29.4V 55.3 – 58.4V
Hand resetflag
Full volts(no ext. R)
Full volts(no ext. R) 36.5 – 42.7V 31.3 – 38.8V 27.3 – 33.8VTest 2
(Alarmsupply)
Self resetflag
Full volts(no ext. R)
Full volts(no ext. R) 38.2 – 39.3V 40.9 – 43.7V 31.1 – 34.0V
Hand resetflag 15.7 – 16.3V 18.8–19.7V 27.1 – 28.5V 55.8 – 58.9V 110.6 –116.8V
Test 3(Tripsupply)
Self resetflag 12.7 – 13.3V 18.8–19.7V 27.1 – 28.5V 55.8 – 58.9V 110.6 –116.8V
Hand resetflag 665 1085 3100 7400 14700Test 4
Self resetflag 522 1085 3100 7400 14700
Table 2
2.7.5 MVAX 31 04 only
The following test assume trip and alarm supply battery voltages are equal to themaximum voltage for the relays voltage rating range. For other voltages within therelays normal voltage rating range, tolerance bands for other measured supplyvoltages should be altered pro-rata. A Table (Table 1) of acceptable tolerance for thetest is given.
Measure the trip supply and alarm supply voltages immediately prior to testsand note.
Test 1
With the circuit breakers open, check that no voltage appears across terminals 13and 14, 21 and 22 of the relay. Check that the voltage appearing across terminals27(+) and 28 comply with that given in Figure 1 (alarm supply) and that the frontrelay RL1, has operated. Reset the flag.
Test 2
With the circuit breakers closed, check that the front relay remains operated. Measurethe voltage across terminals 13(+), 14, 21(+) and 22. Ensure that these comply withFigure 1 (trip supply).
Test 3
With the circuit breakers closed, apply a temporary short circuit across each of theexternal resistors REXT2(1)* and REXT2(2)* of the trip supply circuits. Ensure the circuitbreakers do not trip. Remove the short circuits and reapply them across terminals 13and 14 and 22 of the relay. Check that RL1 drops-off to initiate alarm circuits and
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REPAIR FORM
Please complete this form and return it to ALSTOM T&D - Energy Automation & Information withthe equipment to be repaired. This form may also be used in the case of application queries.
ALSTOM T&D – Energy Automation & InformationSt. Leonards WorksStaffordST17 4LXEngland
For : After Sales Service Department
Customer Ref: ___________________ Model No: ___________________
ALSTOM Contract Ref: ___________________ Serial No: ___________________
Date: ___________________
1. What parameters were in use at the time the fault occurred?
AC Volts ___________________ Main VT/Test set
DC Volts ___________________ Battery/Power supply
AC current ___________________ Main CT/Test set
Frequency ___________________
2. Which type of test was being used?
3. Were all the external components fitted where required? Yes / No(Delete as appropriate)
4. List the relay settings being used
5. What did you expect to happen?
continued overleaf
#
6. What did happen?
7. When did the fault occur?
Instant Yes / No Intermittent Yes / No
Time delayed Yes / No (Delete as appropriate)
By how long? ___________________
8. What indications if any did the relay show?
9. Was there any visual damage?
10. Any other remarks which may be useful:
Signature Title
Name (in capitals) Company name
ABCDALSTOM T&D Energy Automation & Information St Leonards Works, Stafford, ST17 4LX England
Tel: 44 (0) 1785 223251 Fax: 44 (0) 1785 212232 Email: [email protected] Internet: www.alstom.com
©2002 ALSTOM T&D – Energy Automation & InformationOur policy is one of continuous product development and the right is reserved to supply equipment which may vary slightly from that described.
Publication R8010L Printed in England