7. Activate the BLOCK binary input.
8. Activate the CRL binary input.
No ECHO and CS should appear.
9. Switch off the polarizing voltage and reset the BLOCK and CRL binary input.
If setting WEI = Echo & Trip
M13936-52 v12
1. Inject the polarizing voltage 3V0 to about 90% of the setting ( 3V0PU ) operating voltage.
2. Activate the CRL binary input.
No ECHO, CS and TRWEI outputs should appear.
3. Increase the injected voltage to about 110% of the setting ( 3V0PU ) operating voltage.
4. Activate the CRL binary input.
5. Check that the ECHO, CS and TRWEI appear on the corresponding binary output or on the local
HMI.
6. Reset the CRL binary input.
7. Activate the BLOCK binary input.
8. Activate the CRL binary input.
No ECHO, CS and TRWEI outputs should appear.
9. Reset the CRL and BLOCK binary input.
10. Inject the polarizing voltage 3V0 to about 110% of the setting (3V0PU>) and adjust the phase angle
between the voltage and current to (180°- AnglRCA) setting, the current leads the voltage.
11. Inject current in one phase to about 110% of the set trip current ( INDir).
12. Activate the CRL binary input.
No ECHO and TRWEI should appear.
13. Abruptly reverse the current to 65° lagging the voltage to trip the forward directional element.
No ECHO and TRWEI should appear.
14. Switch the current off and check that the ECHO, CS and TRWEI appear on the corresponding
binary output during 200ms after resetting the directional element. If EF4PTOC also trips in forward
direction, CS should be obtained.
15. Switch the polarizing voltage off and reset the CRL binary input.
11.12.5.3 Completing the test
M13936-90 v5
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
Section 11 1MRK 504 165-UUS Rev. J
Testing functionality by secondary injection
272 Transformer protection RET670
Commissioning manual
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