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Section 6
Testing functionality
6.4.1.1
6.4.1.2
6.4.2
62
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.
Measuring the operate limit of set values
1.
Inject a phase current into the IED with an initial value below that of the setting.
2.
Increase the injected current until the TRIP signal appears.
3.
Switch the fault current off.
Observe: Do not exceed the maximum permitted overloading of
the current circuits in the IED.
4.
Compare the measured operating current with the set value.
Completing the test
Continue to test another function or end the testing by setting the parameter TestMode
to Disabled under Main menu/Tests/IED test mode/1:TESTMODE. If another
function is tested, then set the parameter Blocked to No under Main menu/Tests/
Function test modes/Current/PHPIOC(50,I>>)/1:PHPIOC for the function, or for
each individual function in a chain, to be tested next. Remember to set the parameter
Blocked to Yes, for each individual function that has been tested.
Instantaneous phase overcurrent protection phase
segregated output SPTPIOC (50)
Prepare the IED for verification of settings as outlined in
verify
settings".
Values of the logical signals for SPTPIOC (50) are available on the local HMI under
Main menu/Tests/Function status/Current/SPTPIOC(50,I>>)/1:SPTPIOC. 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-ground 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.
1.
Inject a phase current into the IED with an initial value below that of the setting.
2.
Increase the injected current in the Ln phase until the TR_A (TR_B or TR_C)
signal appears.
1MRK 506 331-UUS A
5.1 "Preparing the IED to
Commissioning Manual
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