PKR39809-02

Frequency Measurement

Frequency is measured on each available switchgear terminal. The frequency displayed and used for frequency protection is that of the first available terminal with voltage measurement, selected in the order:

  • PMSet U Series: Ai, Bi, Ci, and if external CVT’s are fitted, then Ax, Bx, Cx

The selected terminal is displayed as the Frequency Bushing in a read-only field. The frequency value is updated every 0.5 s and averaged over 2.0 s.

The frequency displayed in Measurements is the measured frequency and is valid whenever the voltage on the selected terminal is equal to or above the Low Voltage Inhibit threshold.

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

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