ABB RELION 620 Series Technical Manual page 685

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1MAC504801-IB E

620 series ANSI

Technical Manual

Voltage swell set

Voltage dip set

Voltage Int set

GUID-F44C8E6E-9354-44E4-9B2E-600D66B76C1A-ANSI V2 EN

Detection of three-phase voltage interruption

The module measures voltage variation magnitude on each phase separately, that is,

phase-segregated status for voltage variation indication is available in monitored data

(PICKUP_A, PICKUP_B and PICKUP_C). The configuration parameter Phase

supervision defines which voltage phase or phases are monitored. If a voltage phase is

selected to be monitored, the function assumes it to be connected to a voltage

measurement channel. In other words, if an unconnected phase is monitored, the function

falsely detects a voltage interruption in that phase.

The maximum magnitude and depth are defined as percentage values calculated from the

difference between the reference and the measured voltage. For example, a dip to 70

percent means that the minimum voltage dip magnitude variation is 70 percent of the

reference dip voltage amplitude.

The activation of the BLOCK input resets the function and outputs.

Power quality measurement functions

A) Three phase mode

B) Single phase mode

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