Woodward HighPROtec MCDLV4, Manual

Page: 1081 / 1275

Supervision
How to set up the Loss of Potential (Evaluating Measured Quantities)
Set the Alarm Time Delay »t-Alarm«.
To prevent a malfunction of the VT supervision for a system fault assign Alarms of overcurrent elements that
should block the Loss of Potential element.
It is necessary to set the parameter »
LOP.LOP Blo Enable« to »active«. Otherwise the Measuring circuit
supervision cannot block elements in case of a loss of potential.
How to make the Loss of Potential (Evaluating Measured Quantities) effective
The Loss of Potential respectively measuring circuit supervision can be used to block protective elements like
undervoltage protection in order to prevent faulty tripping.
Set the parameter »
Measuring Circuit Supervision=active« within those protective elements that should be
blocked by the Loss of Potential supervision.
1081 MCDLV4 DOK-HB-MCDLV4-2E