Variation Validation - ABB 615 series Technical Manual

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Power quality measurement functions

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, there

are phase-segregated outputs ST_A, ST_B and ST_C for voltage variation indication.

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 voltage amplitude.

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

Variation validation

The validation criterion for voltage variation is that the measured total variation duration

is between the set minimum and maximum durations (Either one of VVa dip time 1, VVa

A) Three phase mode

B) Single phase mode

1MAC059074-MB A

615 series ANSI

Technical Manual

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