Testing Current Protection Functions; Instantaneous Phase Overcurrent Protection 3-Phase Output Phpioc (50); Measuring The Operate Limit Of Set Values; Completing The Test - ABB REQ650 Commissioning Manual

Section 6
Testing functionality
6.3
6.3.1
6.3.1.1
6.3.1.2
46

Testing current protection functions

Instantaneous phase overcurrent protection 3-phase output
PHPIOC (50)
Prepare the IED for verification of settings as outlined in
settings".
Values of the logical signals for PHPIOC (50) are available on the local HMI under Main
menu/Tests/Function status/Current/PHPIOC(50,I>>)/PHPIOC:1. 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.

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/TESTMODE:1. If another function is
tested, then set the parameter Blocked to No under Main menu/Tests/Function test
modes/Current/PHPIOC(50,I>>)/PHPIOC:1 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.
1MRK 505 293-UUS A
5.1 "Preparing the IED to verify
Commissioning manual