Hitachi Relion 670 Series Commissioning Manual page 200

Section 11
Testing functionality by secondary injection
1. Go to Main menu /Test /Function test modes /Multipurpose protection /
GeneralCurrentVoltage(GAPC) /CVGAPC:x and make sure that CVGAPC to be tested is
unblocked and other functions that might disturb the evaluation of the test are blocked.
2. Connect the test set for injection of three-phase currents to the appropriate current terminals of the
IED.
3. Inject current(s) in a way that relevant measured current (according to setting parameter
CurrentInput) is created from the test set. Increase the current(s) until the low set stage trips and
check against the set trip value.
4. Decrease the current slowly and check the reset value.
5. Block high set stage if the injection current will activate the high set stage when testing the low set
stage according to below.
6. Connect a TRIP output contact to the timer.
7. Set the current to 200% of the trip value of low set stage, switch on the current and check the time
delay.
For inverse time curves, check the trip time at a current equal to 110% of the trip current at
t_MinTripDelay.
8. Check that TRIP and PICKUP contacts trip according to the configuration logic.
9. Release the blocking of the high set stage and check the trip and reset value and the time delay for
the high set stage in the same way as for the low set stage.
10. Finally check that PICKUP and TRIP information is stored in the event menu.
11.8.2.2 Overcurrent feature with current restraint
The current restraining value has also to be measured or calculated and the influence on the operation
has to be calculated when the testing of the trip value is done.
Procedure
1. Trip value measurement
The current restraining value has also to be measured or calculated and the influence on the
operation has to be calculated when the testing of the trip value is done.
11.8.2.3 Overcurrent feature with voltage restraint
Procedure
1. Connect the test set for injection of three-phase currents and three-phase voltages to the
appropriate current and voltage terminals of the IED.
2. Inject current(s) and voltage(s) in a way that relevant measured (according to setting parameter
CurrentInput and VoltageInput) currents and voltages are created from the test set.
Overall check in principal as above (non-directional overcurrent feature)
3. Trip value measurement
The relevant voltage restraining value (according to setting parameter VoltageInput) has also to be
injected from the test set and the influence on the trip value has to be calculated when testing of
the trip value is done.
4. Trip time measurement
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Information on how to use the event menu is found in the operator's manual.
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1MRK506371-UUS Rev. M
SEMOD56488-35 v3
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Line distance protection REL670
Commissioning manual