PKR39809-02

Recovery Time Out

The Recovery Time Out setting determines how long a Normal Voltage Close will remain pending after a UOV protection trip.

The maximum value for the Normal Voltage Close time is the Recovery Time Out time minus 1 s (when Recovery Time Out is On).

The figure below shows a maximum Normal Voltage Close After time of 599 s due to the Recover Time Out setting of 10 minutes.

Figure 168
WSOS Normal Voltage Close setting

Should the switchgear NOT close subsequent to a UOV protection trip within the configured Recovery Time Out period, the ACR will go to Lockout.

A UOV Recover Time Out event will be logged and a SCADA alarm point will be set.

If the voltage on the source side bushings drops below the Live/Dead threshold, the Normal Voltage Close will be aborted and the ACR will go to Lockout.

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