Short circuit detection
■ completion power outage work after the high pressure, the confirmation of the presence or absence of the low-pressure path short-circuit (short-circuit grounding member of the remove forget to be confirmed)
■ receiving point switch of the over-current operation (SOG operation) short circuit detection and short-circuit of the equipment of the time confirmation
■ power fuse blown, confirmation of the short-circuit equipment at the time of overcurrent relay operates