
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
M14947-37 v2
Weak-end infeed logic at permissive overreach schemes
M14947-39 v5
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
GUID-301AA7D5-1DC5-47A7-A910-43E3514AE0B0 v2
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-N parameter values
Phase
I (Amps)
Phase-angle
(Deg)
V (Volts)
Phase-angle
(Deg)
L1
0
0
Set less than
UPN<
0
L2
0
180
63
180
For L2-N fault, change all settings cyclically.
The setting parameter
WEI
is set to
Echo & Trip
.
1.
Apply input signals according Table
.
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.
The ECHO output gives only a 200 ms pulse.
10.10.2.3
Completing the test
M14947-105 v5
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
M13926-2 v6
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings"
Section 10
1MRK 506 377-UEN Rev. K
Testing functionality by secondary injection
134
Railway application RER670
Commissioning manual
© 2017 - 2021 Hitachi Power Grids. All rights reserved
Содержание Relion 670 series
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