Check of the non-directional phase overcurrent function. This
is done in principle as instructed above, without applying any
polarizing voltage.
6.3.2.2
Completing the test
Continue to test another function or end the testing by setting the parameter
TestMode
to
Off
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/OC4PTOC(51_67,4I>)/1:OC4PTOC
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
Instantaneous residual overcurrent protection EFPIOC
Prepare the IED for verification of settings as outlined in
Values of the logical signals for EFPIOC are available on the local HMI under
Main menu/Tests/Function status/Current/EFPIOC(50N,IN>>)/1:EFPIOC
.
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.
6.3.3.1
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 in the Ln or in the neutral (summated current
input) phase until the TRIP 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.
Section 6
1MRK 511 248-UEN -
Testing functionality
42
Commissioning Manual
