PKR39809-02

UOV Close Block

Close Blocking allows an enabled and suitably configured protection element to preemptively apply a constraint to any switchgear CLOSE operation.

UOV protection is an Element Close Blocking (ECB) capable protection element.

switchgear will not be able to be closed by any means when a fault condition that would cause an Under Voltage trip exists.

If Under Voltage protection is enabled (Trip mode), and UOV Close Blocking is selected, the Similarly, if Over Voltage protection is enabled (Trip mode), and UOV Close Blocking is selected, the switchgear will not be able to be closed by any means when a fault condition that would cause an Over Voltage trip exists.

Close Blocking applies regardless of the reason for the most recent TRIP request.

Close Blocking also applies to all types of Close requests that is SCADA, HMI, IOEX etc.

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