No ECHO, CS and TRWEI outputs should appear.
3. Increase the injected voltage to about 110% of the setting (3U0) 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
3U0 to about 110% of the setting (3U0>) 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 operate current
(IN>Dir ).
12. Activate the CRL binary input.
No ECHO and TRWEI should appear.
13. Abruptly reverse the current to 65° lagging the voltage to operate 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
operates in forward direction, CS should be
obtained.
15. Switch the polarizing voltage off and reset the CRL binary input.
11.11.6.3 Completing the test
M13936-90 v5
Continue to test another function or end the test by changing the TESTMODE
setting to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 247
Commissioning manual
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