Values of the logical signals for EFPIOC are available on the local HMI under
Main menu /Tests /
Function status /Current protection /InstResidualOverCurrent(50N,IN>>) /
EFPIOC(50N;IN>>):x
, where x = 1, 2, and 3.
The Signal Monitoring in PCM600 shows the same signals that are available on the local HMI.
To verify the settings the following fault type should be tested:
•
Phase-to-earth fault
Ensure that the maximum continuous current, supplied from the current source used for the test of
the IED, does not exceed four times the rated current value of the IED.
11.4.3.1
Measuring the operate limit of set values
SEMOD52967-11 v9
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.
Do not exceed the maximum permitted overloading of the current circuits in the
IED.
4.
Compare the measured operating current with the set value.
11.4.3.2
Completing the test
SEMOD52967-24 v5
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.
11.4.4
Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC
SEMOD53296-3 v10
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings"
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.
11.4.4.1
Function revision history
GUID-0F9199B0-3F86-45E0-AFC2-747052A20AE1 v2
Document
revision
Product
revision
History
A
2.2.1
-
B
2.2.1
-
C
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”.
D
2.2.3
-
Table continues on next page
Section 11
1MRK 511 403-UEN Rev. L
Testing functionality by secondary injection
90
Bay control REC670
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
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