8. Check that all trip and pickup contacts trip according to the configuration (signal
matrixes).
9. Reverse the direction of the injected current and check that the protection does
not trip.
10. If 2 out of 3 or 3 out of 3 currents are chosen for operation: Check that the
function will not trip with current in one phase only.
11. Repeat the above described tests for the higher set stages.
12. Check that pickup and trip information is stored in the event menu .
13.5.2.2 Completing the test
SEMOD56287-118 v4
Continue to test another function or end the test by changing the TESTMODE setting to
Disabled. Restore connections and settings to their original values, if they were
changed for testing purposes.
13.5.3 Instantaneous residual overcurrent protection EFPIOC (50N)
SEMOD52967-3 v7
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to
verify settings".
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-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.
13.5.3.1 Measuring the trip 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. Disable the fault current
Section 13 1MRK 502 073-UUS A
Testing functionality by secondary injection
190 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual
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