Protective Elements
QV Protection Trip Direction
Definitons
Load Flow Arrow System = Consumed active and reactive are counted positive (greater than zero)
Generator Flow Arrow System = produced power is to be counted positive (greater than zero)
By means of the parameter power trip dir positve/negative a sign reversal can be applied to the reactive power
within the QV-Protection module. Protective devices that use the load flow arrow (like the MCA4 or the MRA4) are
to be set to »
Power Trip dir= positive«.
Protective devices that are working on the base of the generator flow arrow
system (like the MCDGV4) are to be set to »
Power Trip dir= negative«.
By means of that generator protection relays
like the MCDGV4 can be set to the load flow arrow system internal within the QV-Protection (only). That means that
outside of the QV-Protection no other power measurement or power protection is effected.
959 MCDGV4 DOK-HB-MCDGV4-2E
To Next Page
