PKR39809-02

Excess UOV Protection Sequences

A Under Voltage (or Over Voltage) Sequence is a Under Voltage (or Over Voltage) trip followed by a Normal Voltage Close.

If the number of Under Voltage (or Over Voltage) sequences equals a configured threshold within a configured time period, then Under Voltage (or Over Voltage) protection will be turned Off by forcing Under Voltage Trip (or Over Voltage Trip) to Off.

An event will be logged and a SCADA alarm point will be set at the time of the last Close

For example,

  • Under Voltage Excess Sequence

  • Over Voltage Excess Sequence

The time period is a rolling window that is updated every minute. If the Excess Sequences In setting is 10 minutes, the count will always be the number of sequences that occurred in the 10 minutes prior to the most recent update.

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