Hitachi Relion 670 Series Commissioning Manual page 229

1MRK506371-UUS Rev. M
11.11.3.4 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 Local acceleration logic ZCLCPSCH
Prepare the IED for verification of settings as outlined in section
for test" in this chapter.
The logic is checked during the secondary injection test of the impedance measuring zones.
11.11.4.1 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-ground fault at 100% of line impedance.
4. Check that the fault is tripped with the zone 2 time delay.
5. Provide the IED with conditions equivalent to normal load for at least two seconds.
6. Activate the condition for accelerated function either by the autorecloser or by the loss-of-load.
7. Apply a phase-to-ground fault at 100% of line impedance.
8. Check that the fault is tripped instantaneously.
11.11.4.2 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.
11.11.5 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.
11.11.5.1 Function revision history
Document
revision
B
C
D
Table continues on next page
Line distance protection REL670
Commissioning manual
Product History
revision
2.2.1 -
2.2.2 -
2.2.2
© 2017 - 2023 Hitachi Energy. All rights reserved
Testing functionality by secondary injection
"Requirements" and section
"Preparing the IED to verify
GUID-F53CEDFF-DD1E-4FC2-A8AF-85DD40DBF71B v2
Section 11
M14947-105 v5
M11758-32 v5
"Preparing
M11758-37 v5
M11758-57 v4
M13926-2 v6
settings".
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