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1MRK 505 378-UEN Rev. K
The setting parameter WEI is set to Echo & Trip.
1.
Apply input signals according Table 41.
2.
Activate the receive (CR) signal.
3.
After the IED has operated, turn off the input signals.
4.
Check that trip, send signal, and indication are obtained.
11.11.3.4
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.11.4
Local acceleration logic ZCLCPSCH
Prepare the IED for verification of settings as outlined in section
section
The logic is checked during the secondary injection test of the impedance measuring zones.
11.11.4.1
Verifying the settings
1.
Provide the IED with conditions equivalent to normal load for at least two seconds.
2.
Deactivate the conditions for accelerated function.
3.
Apply a phase-to-earth fault at 100% of line impedance.
4.
Check that the fault is tripped with the zone 2 time delay.
5.
Provide the IED with conditions equivalent to normal load for at least two seconds.
6.
Activate the condition for accelerated function either by the autorecloser or by the loss-of-load.
7.
Apply a phase-to-earth fault at 100% of line impedance.
8.
Check that the fault is tripped instantaneously.
11.11.4.2
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.11.5
Scheme communication logic for residual overcurrent
protection ECPSCH
Prepare the IED for verification of settings outlined in Section
Before testing the communication logic for residual overcurrent protection function ECPSCH, the four
step residual overcurrent protection function EF4PTOC has to be tested according to the
corresponding instruction. Once this is done, continue with the instructions below.
If the current reversal and weak-end infeed logic for earth-fault protection is included, proceed with
the testing according to the corresponding instruction after testing the communication logic for
residual overcurrent protection. The current reversal and weak-end-infeed functions shall be tested
together with the permissive scheme.
Line differential protection RED670
Commissioning manual
The ECHO output gives only a 200 ms pulse.
"Preparing for test"
in this chapter.
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Testing functionality by secondary injection
"Requirements"
and
"Preparing the IED to verify
Section 11
M14947-105 v5
M11758-32 v5
M11758-37 v5
M11758-57 v4
M13926-2 v6
settings".
223
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