Bender NGRM700 - Page 60

Initial commissioning
60
NGRM7xx_D00292_07_M_XXEN/02.2022
Ground-fault relay timing diagram
Fig. 8.1: Ground-fault relay timing diagram
NGR-fault relay timing diagram
Fig. 8.2: NGR-fault relay timing diagram
40 ms
t
GF Trip
= 100 ms...48 h,∞
Ground fault
Ground-fault relay
Trip relay
Ground fault
0 … 48 h
t
NGR Trip
NGR fault
NGR-fault relay
Trip relay
NGR fault
< 7.5 s