IBC51A Directional Overcurrent Relay manual (Rev. A)
PHASE DIRECTIONAL OVERCURRENT RELAYS - Types IBCV51E IBCV54H IBCV52E IBCV77E IBCVS3H IBCV78E
PHASE DIRECTIONAL OVERCURRENT RELAYS - Types IBCV51E IBCV52E IBCV53H
IBCV51M/52M/53M/54M/77M/78M - PHASE DIRECTIONAL OVERCURRENT RELAYS WITH VOLTAGE RESTRAINT