GE MiCOM P141 Agile - Page 134

where:
● I
F
= Minimum fault current expected for the r
emote fault
● I> = Phase current setting for the element to have VCO control
Example
If the overcurrent device has a setting of 160% In, but the minimum fault current for the remote fault condition is
only 80% In, then the required k factor is given by:
k =
×
=
0 8
1 6 1 2
0 42
.
. .
.
The voltage threshold, Vdep OC V<
setting would be set below the lowest system voltage that may occur under
normal system operating conditions, whilst ensuring correct detection of the remote fault.
Chapter 6 - Current Protection Functions P14x
108 P14xEd1-TM-EN-1