6.3.2
Instantaneous phase overcurrent protection phase segregated
output SPTPIOC (50)
Prepare the IED for verification of settings as outlined in
5.1 "Preparing the IED to verify
Values of the logical signals for SPTPIOC (50) are available on the local HMI under
Main
menu/Tests/Function status/Current/SPTPIOC(50,I>>)/SPTPIOC: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.
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.
3. Switch the fault current off. Observe to not exceed the maximum permitted
overloading of the current circuits in the IED.
4. Compare the measured operating current with the set value.
6.3.2.1
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/SPTPIOC(50,I>>)/SPTPIOC: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.
6.3.3
Four step phase overcurrent protection 3-phase output
OC4PTOC (51_67)
Prepare the IED for verification of settings as outlined in
5.1 "Preparing the IED to verify
Values of the logical signals for OC4PTOC (51_67) are available on the local HMI under
Main menu/Tests/Function status/Current/OC4PTOC(51_67,4I>)/OC4PTOC:1
.
The Signal Monitoring in PCM600 shows the same signals that are available on the local
HMI.
1MRK 505 293-UUS A
Section 6
Testing functionality
47
Commissioning manual
