Completing The Test; Scheme Communication Logic For Residual Overcurrent Protection Ecpsch - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
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 three faults (one in each phase). For phase L1-
N fault, set these parameters:
Table 40: Phase L1-N parameter values
Phase
L1
L2
L3
If wanted, change all settings cyclically for other faults (L2-N and L3-N).
The setting parameter
1. Apply input signals according Table 40.
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.
11.11.3.3

Completing the test

continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.11.4 Scheme communication logic for residual overcurrent
protection ECPSCH
Prepare the IED for verification of settings outlined in Section
settings".
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.
232
I (Amps) Phase-angle
(Deg)
0 0
0 240
0 120
WEI is set to Echo & Trip .
The ECHO output gives only a 200 ms pulse.
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V (Volts) Phase-angle
(Deg)
UPN<
Set less than 0
63 240
63 120
TESTMODE setting to Off .
"Preparing the IED to verify
Transformer protection RET670
1MRK 504 165-UEN E
M14947-52 v7
M14947-105 v5
M13926-2 v6
Commissioning manual