9.3.3
Instantaneous residual overcurrent protection EFPIOC
SEMOD52967-3 v7
Prepare the IED for verification of settings outlined in Section
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.
9.3.3.1
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.
9.3.3.2
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 their original values, if they were changed for testing
purposes.
9.3.4
Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC
SEMOD53296-3 v9
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/
Tests/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.
9.3.4.1
Four step directional earth fault protection
SEMOD53296-208 v7
1MRK 505 385-UEN C
Section 9
Testing functionality by secondary injection
Breaker protection REQ650
63
Commissioning manual
© Copyright 2017 ABB. All rights reserved