Deif GPC-3 Hydro, Designers Reference Handbook

Page: 98 / 122

There is a choice between seven different curve shapes, of which six are predefined and one is user-defina-
ble:
IEC Inverse
IEC Very Inverse
IEC Extremely Inverse
IEEE Moderately Inverse
IEEE Very Inverse
IEEE Extremely Inverse
Custom
Common settings for all types:
Setting Parameter no. Factory setting value Equals
LIM 1082 110 % LIM = G
s
/I
nom
TMS 1083 1.0 Time multiplier setting
The following constants apply to the predefined curves:
Curve type k c α
IEC Inverse 0.14 0 0.02
IEC Very Inverse 13.5 0 1
IEC Extremely Inverse 80 0 2
IEEE Moderately Inverse 0.515 0.1140 0.02
IEEE Very Inverse 19.61 0.491 2
IEEE Extremely Inverse 28.2 0.1217 2
For the custom curve, these constants can be defined by the user:
Setting Parameter no. Factory setting value Equals
k 1084 0.140 s k
c 1085 0.000 s c
α 1086 0.020 α
For the actual setting ranges, see the separate parameter list document.
GPC-3 DRH 4189340587 UK Protections
DEIF A/S Page 98 of 122