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1MRK 511 409-UUS Rev. K
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.
11.7.2.2
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.
11.7.2.3
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
Definite times may be tested as above (non-directional overcurrent feature). For inverse time
characteristics the PICKUP value (to which the overcurrent ratio has to be calculated) is the actual
pickup value as got with actual restraining from the voltage restraining quantity.
11.7.2.4
Overcurrent feature with directionality
Please note that the directional characteristic can be set in two different ways either just dependent on
the angle between current and polarizing voltage (setting parameter DirPrinc_OC1 or DirPrinc_OC2 set
to or in a way that the trip value also is dependent on the angle between current and polarizing voltage
according to the I · cos(F) law (setting parameter DirPrinc_OC1 or DirPrinc_OC2 set to I · cos(F). This
has to be known if a more detailed measurement of the directional characteristic is made, than the one
described below.
Procedure
Phasor measurement unit RES670
Commissioning manual
Information on how to use the event menu is found in the operator's manual.
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Section 11
Testing functionality by secondary injection
SEMOD56488-35 v3
SEMOD56488-44 v5
SEMOD56488-60 v5
127
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