Completing The Test; Scheme Communication Logic For Residual Overcurrent Protection Ecpsch (85); Function Revision History; Testing The Directional Comparison Logic Function - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
11.11.3.2

Completing the test

Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.11.4 Scheme communication logic for residual overcurrent protection
ECPSCH (85)
Prepare the IED for verification of settings outlined in Section
Before testing the communication logic for residual overcurrent protection function ECPSCH (85), the
four step residual overcurrent protection function EF4PTOC (51N/67N) 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 ground-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.
11.11.4.1

Function revision history

Document
revision
B
C
D
E
F
G
H
J
K
L
M
11.11.4.2

Testing the directional comparison logic function

Blocking scheme
1. Inject the polarizing voltage 3V0 at 5% of VBase (EF4PTOC, 51N67N) where the current is lagging
the voltage by 65°.
2. Inject current (65° lagging the voltage) in one phase at about 110% of the set operating current, and
switch the current off with the switch.
3. Switch the fault current on and measure the operating time of the communication logic.
Use the TRIP signal from the configured binary output to stop the timer.
192
Product History
revision
2.2.1 -
2.2.2 -
2.2.2
2.2.2 -
2.2.3 -
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4
2.2.5 Added separate DOs for teleprotection permissive (TxPrm & RxPrm1), blocking (TxBlk &
RxBlk1) and direct trip (TxTr & RxTr1) transmit and receive signals in accordance with 61850
Ed 2.0.
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"Preparing the IED to verify
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