PKR39809-02

ROCOF Protection Operation

The ROCOF in terms of Hertz per second (Hz/s) is continually calculated and monitored by the PowerLogic ADVC Controller. If the calculated rate goes above a user set value the protection will start timing out to trip the switchgear.

NOTE: Due to the nature of the filtering that is performed to produce the ROCOF value from frequency measurements, there is a delay of approximately 200 ms between any step change in the network ROCOF and the value of ROCOF used by the PowerLogic ADVC Controller.

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