1. Set OperationOV to On.
2. Connect the test set for three-phase current injection and three-phase voltage
to the appropriate IED terminals.
3.
Inject symmetrical phase voltages equal to the rated voltage.
4. Decrease the injected voltage in phase L1 and note the operated value (start
value) of the function.
5. Increase the voltage slowly and note the reset value.
6. Connect a trip output contact to a timer.
7. Reduce the injected voltage stepwise to 90% of the operate level, and check
the time delay.
8. Check that all trip and start contacts operate according to the configuration
(signal matrices).
9. Finally, check that start and trip information is stored in the event menu.
Repeat steps 4 – 9 for phases L2 and L3.
If voltage compensation will be used, do the following steps:
10. Set EnShuntReactor to On and activate input signal SWIPOS.
11. Check that the line impedance (R1 and X1) and reactor impedance (Xc) are
set to the correct values.
12. Inject symmetrical phase voltages equal to the rated voltage.
13. Increase the injected current (same phase angle as the injected voltage) in
phase L1 from zero and note the operated value (start value) of the function.
Check that this value is equal to:
( )
injected injected
injected injected L L
xy cp
U U
U U I j j R jX
X X
= - - + × +
æ ö
ç ÷
è ø
14. Repeat step 13 for phases L2 and L3.
15. Set OperationOV
to On.
16. Connect the test set for three-phase current injection and three-phase voltage
to the appropriate IED terminals.
17. Inject symmetrical phase voltages equal to the rated voltage.
18. Increase the injected voltage in phase L1 and note the operated value (start
value) of the function.
19. Decrease the voltage slowly and note the reset value.
20. Connect a trip output contact to a timer.
21. Increase stepwise the injected voltage to 110% of the operate level, and check
the time delay.
22. Check that all trip and start contacts operate according to the configuration
(signal matrices).
23. Finally check that start and trip information is stored in the event memory.
Repeat steps 17 – 22 for phases L2 and L3.
If voltage compensation will be used do the following steps:
24. Set EnShuntReactorto On and activate input signal SWIPOS.
25. Check that the line impedance (R1 and X1) and reactor impedance (Xc) are
set to the correct values.
26. Inject symmetrical phase voltages equal to 120% of the rated voltage.
27. Increase the injected current (same phase angle as the injected voltage) in
phase L1 from zero and note the operated value (start value) of the function.
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 249
Commissioning manual
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