ABB Relion 670 Series Commissioning Manual page 230

Section 11
Testing functionality by secondary injection
1. Deactivate the receive (CRLx) signal of the IED.
2. Apply healthy normal load conditions to the IED for at least two seconds.
3. Apply a fault condition within the forward directed zone used for scheme communication
tripping.
4. Check that correct trip outputs and external signals are obtained for the type of fault
generated and that the operate time complies with the
time).
5. Check that the other zones operate according to their zone times and that a send (CS_x)
signal is only obtained for the reverse zone.
6. Activate the IED receive (CRLx) signal.
7. Apply a fault condition in the forward directed zone used for scheme communication
tripping.
8. Check that the no trip from scheme communication occurs.
9. Check that the trip time from the forward directed zone used for scheme communication
tripping complies with the zone timer and that correct trip outputs, external signals, and
indications are obtained for the actual type of fault generated.
11.11.2.4 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.
11.11.3 Current reversal and Weak-end infeed logic for distance
protection 3-phase ZCRWPSCH (85)
Prepare the IED for verification of settings as outlined in section
section "Preparing for test"
Values of the logical signals for ZCRWPSCH are available on the local HMI under Main menu/Tests/
Function status / Scheme communication / ZCRWPSCH(85) /ZCRWPSCH:1.
The Signal Monitoring in PCM600 shows signals that are available on the Local HMI.
The current reversal logic and the weak-end infeed functions are tested during the secondary-
injection test of the impedance or overcurrent protection zones together with the scheme
communication logic for the distance protection function ZCPSCH (85).
11.11.3.1 Current reversal logic
It is possible to check the delay of the CS send signal with
a forward fault.
By continuously activating the CR input and changing from a reverse to a forward fault, the delay
tDelayRev can be checked.
224
in this chapter.
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tCoord timer (plus relay measuring
TESTMODE setting to Disabled .
"Requirements" and
tDelayRev by changing from a reverse to
Line distance protection REL670
Commissioning manual
1MRK 506 371-UUS E
M13868-84 v6
M14947-2 v7
M14947-8 v3