8.
Check that TRIP and START contacts operate according to the configuration
logic.
9.
Release the blocking of the high set stage and check the operate 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 START and TRIP information is stored in the event menu.
Information on how to use the event menu is found in the
operator's manual.
10.7.1.2
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 operate value is done.
Procedure
1.
Operate 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 operate
value is done.
10.7.1.3
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.
Operate 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
operate value has to be calculated when testing of the operate value is done.
4.
Operate time measurement
Definite times may be tested as above (non-directional overcurrent feature). For
inverse time characteristics the START 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.
10.7.1.4
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
1MRK 511 360-UEN A
Section 10
Testing functionality by secondary injection
Bay control REC670 2.1 IEC
133
Commissioning manual
