Appendix B - Settings and Signals
ORDINAL SIGNAL NAME ELEMENT NAME
DESCRIPTION
1st stage sensitive earth fault (SEF) overcurrent start
2nd stage sensitive earth fault (SEF) overcurrent start
3rd stage sensitive earth fault (SEF) overcurrent start
4th stage sensitive earth fault (SEF) overcurrent start
Undervoltage stage 1, three phase start
Undervoltage stage 1, A/AB phase start
Undervoltage stage 1, B/BC phase start
Undervoltage stage 1, C/CA phase start
Undervoltage stage 2, three phase start
Undervoltage stage 2, A/AB phase start
Undervoltage stage 2, B/BC phase start
Undervoltage stage 2, C/CA phase start
Overvoltage stage 1, three phase start
Overvoltage stage 1, A/AB phase start
Overvoltage stage 1, B/BC phase start
Overvoltage stage 1, C/CA phase start
Overvoltage stage 2, three phase start
Overvoltage stage 2, A/AB phase start
Overvoltage stage 2, B/BC phase start
Overvoltage stage 2, C/CA phase start
Residual overvoltage stage 1 start
Residual overvoltage stage 2 start
Phase A undervoltage level detector used in the pole dead logic. Detectors have a settable threshold: default undervoltage pickup 38.1 V-
drop off 43.8 V
Phase B undervoltage level detector used in the pole dead logic. Detectors have a settable threshold: default undervoltage pickup 38.1 V-
drop off 43.8 V
Phase C undervoltage level detector used in the pole dead logic. Detectors have a settable threshold: default undervoltage pickup 38.1 V-
drop off 43.8 V
VT supervision fast block - blocks elements which would otherwise maloperate immediately a fuse failure event occurs
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