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Section 11
Testing functionality by secondary injection
1.
Inject a phase current into the IED with an initial value below the set value of IN>> and also
make sure that the set value IN>> is in between IN>>Min and IN>>Max.
2.
Increase the injected current in the Ln or in the neutral (summated current input) phase until the
TRIP signal appears.
3.
Switch the fault current off.
4.
Compare the measured operating current with the set value.
11.5.3.2
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.
11.5.4
Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC
Prepare the IED for verification of settings outlined in Section
Values of the logical signals for D2PTOC are available on the local HMI under Main menu/Test/
Function status /Current protection/ResidualOverCurr4Step(51N_67N,4(IN>)) /
EF4PTOC(51N_67N;4(IN>)):x, where x = instance number.
The Signal Monitoring in PCM600 shows the same signals that are available on the local HMI.
11.5.4.1
Function revision history
Document
revision
A
B
C
D
E
F
G
H
J
11.5.4.2
Four step directional earth fault protection
1.
Connect the test set for single current injection to the appropriate IED terminals.
156
Do not exceed the maximum permitted overloading of the current circuits in the
IED.
Product
History
revision
2.2.1
-
2.2.1
-
2.2.2
Technical data table updated with note "Operate time and reset time are only valid if
harmonic blocking is turned off for a step".
2.2.3
-
2.2.3
-
2.2.4
-
2.2.4
-
2.2.4
The phase selection logic is added to allow phase segregated trip. The new phase
selections outputs added to this release are PHSELL1, PHSELL2 and PHSELL3. The
setting EnPhaseSel is added to enable or disable phase selection. The maximum value
changed to 2000.0 % of IBase for IMin1, IMin2, IMin3 and IMin4 settings.
2.2.5
The harmonic restrain function changed to freeze the definite and IDMT timers.
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 505 378-UEN Rev. K
"Preparing the IED to verify
GUID-0F9199B0-3F86-45E0-AFC2-747052A20AE1 v2
Line differential protection RED670
Commissioning manual
SEMOD52967-24 v5
SEMOD53296-3 v10
settings".
SEMOD53296-208 v8
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