9.9.1.5 Checking of unblocking logic
M13868-72 v4
Check the unblocking function (if the function is required) when checking the
communication scheme.
Command function with continuous unblocking (
Unblock
=
1
)
M13868-76 v6
Procedure
1. Activate the guard input signal (CRG) of the IED.
2. Using the scheme selected, check that a signal accelerated trip (TRIP) is
obtained when the guard signal is deactivated.
9.9.1.6 Completing the test
M13868-84 v6
Continue to test another function or end the test by changing the TESTMODE
setting to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
9.9.2 Current reversal and Weak-end infeed logic for distance
protection 3-phase ZCRWPSCH
M14947-2 v7
Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
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.
9.9.2.1 Current reversal logic
M14947-8 v3
It is possible to check the delay of the CS send signal with tDelayRev by changing
from a reverse to a forward fault.
By continuously activating the CR input and changing from a reverse to a forward
fault, the delay tDelayRev can be checked.
Section 9 1MRK 506 383-UEN A
Testing functionality by secondary injection
150 Line distance protection REL650 2.2 IEC
Commissioning manual
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