Pickup Thresholds and Reset

The Pickup thresholds are expressed as per unit values based on the Nominal Phase to Earth Voltage setting. A Pickup occurs when the measured voltage is:

• Under Voltage

  • Less than or equal to the Under Voltage Pickup setting.

• Over Voltage

  • Greater than or equal to the Over Voltage Pickup setting.

Fault Reset occurs following a pickup when the voltage then becomes:

• Under Voltage

  • Greater than the Under Voltage Pickup setting plus the dead-band for the Fault Reset time OR less than the Live/Dead threshold.

• Over Voltage

  • Less than the Over Voltage Pickup setting minus the dead-band for the Fault Reset Time.