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 19: 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 0 240 63 240
L3 0 120 63 120
If wanted, change all settings cyclically for other faults (L2-N and L3-N).
The setting parameter WEI is set to Echo & Trip.
1. Apply input signals according Table 19.
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.
The ECHO output gives only a 200 ms pulse.
10.10.2.3 Completing the test
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.
10.10.3 Local acceleration logic ZCLCPSCH
Prepare the IED for verification of settings outlined in section "Preparing the IED to
verify settings".
The logic is checked during the secondary injection test of the impedance measuring
zones.
10.10.3.1 Verifying the settings
1. Provide the IED with conditions equivalent to normal load for at least two
seconds.
2. Deactivate the conditions for accelerated function.
3. Apply a phase-to-earth fault at 100% of line impedance.
1MRK 511 360-UEN A Section 10
Testing functionality by secondary injection
Bay control REC670 2.1 IEC 171
Commissioning manual
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