PKR39809-02

UOF Close Blocking

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

UOF protection is an ECB capable protection element.

If Under Frequency protection is On, and UOF Close Blocking is selected, the switchgear will not be able to be closed by any means when a fault condition that would cause an Under Frequency trip exists.

Similarly, if Over Frequency protection is On, and UOF 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 Frequency 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.

QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

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