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1MRK 505 378-UEN Rev. K
11.11.7.5
Negative sequence overvoltage protection LCNSPTOV
Prepare the IED for verification of settings as outlined in section
"Preparing for test"
11.11.7.6
Zero sequence overvoltage protection LCZSPTOV
Prepare the IED for verification of settings as outlined in section
"Preparing for test"
1.
Connect the test set for three-phase voltage injection (L1, L2, L3) or residual voltage injection
(N) to the appropriate IED terminals. This depends on how the IED is fed from the VT.
2.
Increase the injected zero sequence voltage and note the operated value (start value) of the
studied step of the function.
3.
Decrease the voltage slowly and note the reset value.
4.
Connect a trip output contact to a timer.
5.
Set the injected voltage to 110% of the operate level in the tested stage, switch on the current
and check the time delay.
6.
Check that all trip and start contacts operate according to the configuration (signal matrices).
7.
Finally check that start and trip information is stored in the event memory.
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.11.7.7
Negative sequence overcurrent protection LCNSPTOC
Prepare the IED for verification of settings as outlined in section
"Preparing for test"
I E D T E S T S E T
IEC10000013 V1 EN-US
Figure 55:
Line differential protection RED670
Commissioning manual
in this chapter.
in this chapter.
in this chapter.
IL 1
IL 2
IL 3
Connection of test equipment to the IED
© 2017 - 2022 Hitachi Energy. All rights reserved
Testing functionality by secondary injection
GUID-BEF622E8-E133-4346-98D4-EC0732878937 v2
"Requirements"
and section
GUID-6289688A-6F66-4173-9F49-A67D3E311513 v1
"Requirements"
and section
GUID-46AA65BF-07F0-4E2B-B00F-D3B2057093DB v1
"Requirements"
and section
IL 1
IL 2
IL 3
IED
IEC10000013-1-en.vsd
Section 11
231
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