Overcurrent Feature With Current Restraint; Overcurrent Feature With Voltage Restraint - ABB Relion 670 Series Installation And Commissioning Manual

1MRK 502 029-UEN A
15.9.1.2
15.9.1.3
Installation and commissioning manual
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 in the 670 series.
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 operates and check against the set operate 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 operate value of low set stage, switch on the
current and check the time delay.
For inverse time curves, check the operate time at a current equal to 110% of
the operate current at tMin.
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.

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.

Overcurrent feature with voltage restraint

Procedure
Verifying settings by secondary injection
Section 15
205