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Section 10
Testing functionality by secondary injection
1.
Set the condition to an impedance at 50% of the reach of the reverse zone connected to IRV.
2.
Activate the receive (CRL) signal.
3.
After the start condition is obtained for reverse zone, apply a fault at 50% of the reach of the
forward zone connected to IRVBLK.
4.
Check that correct trip outputs and external signals are obtained for the type of fault generated.
The operation time should be about the tDelayRev setting longer than the carrier accelerated
trip (TRIP) recorded for the permissive overreach scheme communication.
5.
Restore the forward and reverse zone timer to its original setting.
10.10.2.2
Weak end infeed logic
Weak-end infeed logic at permissive overreach schemes
1.
Check the blocking of the echo with the injection of a CRL signal >40ms after a reverse fault is
applied.
2.
Measure the duration of the echoed CS signal by applying a CRL receive signal.
3.
Check the trip functions and the voltage level for trip by reducing a phase voltage and applying
a CRL receive signal.
Testing conditions
Only one type of fault is sufficient, with the current reversal and weak-end infeed logic for distance
protection function ZCRWPSCH. Apply two faults (one in each phase). For phase L1-N fault, set
these parameters:
Table 29:
Phase
L1
L2
For L2-N fault, change all settings cyclically.
The setting parameter WEI is set to Echo & Trip.
1.
Apply input signals according Table 29.
2.
Activate the receive (CR) signal.
3.
After the IED has operated, turn off the input signals.
4.
Check that trip and send signal are obtained.
10.10.2.3
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.
10.10.3
Scheme communication logic for residual overcurrent
protection ECPSCH
Prepare the IED for verification of settings outlined in Section
134
Phase L1-N parameter values
I (Amps)
Phase-angle
(Deg)
0
0
The ECHO output gives only a 200 ms pulse.
© 2017 - 2022 Hitachi Energy. All rights reserved
V (Volts)
0
Set less thanUPN<
180
63
1MRK 506 377-UEN Rev. L
GUID-301AA7D5-1DC5-47A7-A910-43E3514AE0B0 v2
Phase-angle
(Deg)
0
180
"Preparing the IED to verify
Railway application RER670
Commissioning manual
M14947-37 v2
M14947-39 v5
M14947-105 v5
M13926-2 v6
settings".
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