GE P741

A
pplication Notes P74x/EN AP/N
a7
MiCOM P74
1, P742, P743 (AP) 6-
65
AP
Where:
V
k
= Equivalent IEC or BS knee point voltage
C = C Rating
I
n
= 5A
R
CT
= CT secondary winding resistance
Kssc = 20 times