Variation Validation - ABB RED615 Technical Manual

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1YHT530004D05 D

Technical Manual

Voltage swell set

Voltage dip set

Voltage Int set

GUID-F44C8E6E-9354-44E4-9B2E-600D66B76C1A V1 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 swell time 1 or VVa Int time 1, depending on the variation type, and

VVa Dur Max). The maximum variation duration setting is the same for all

variation types.

Power quality measurement functions

A) Three phase mode

B) Single phase mode

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