Patent ID: 8902075

Claim:
A pre-cover-opening power-off apparatus with a lock, comprising: an electrical equipment cover plate, a bolt casing with a lock, a key, a lock core, a bolt, a motion sensor, and a safety protecting and monitoring unit, wherein the electrical equipment cover plate is connected to the bolt casing with a lock by the bolt, wherein the key and the lock core are provided inside a hole on one side of the bolt casing with a lock, wherein the motion sensor is connected to the safety protecting and monitoring unit, the bolt is jacketed with a distance sleeve, wherein the distance sleeve is provided with an annular locking slot, and wherein the annular locking slot is connected to the lock core; wherein the motion sensor is a motion sensor with a motion sensor rod, wherein the motion sensor with the motion sensor rod is provided inside a hole in an upper portion of the bolt casing with a lock, and a lower end of the motion sensor rod is pressed against a bolt head of the bolt; or the motion sensor with the motion sensor rod is provided inside a hole at a side portion of the bolt casing with a lock, so that the motion sensor rod contacts the bolt or the distance sleeve; or the motion sensor with the motion sensor rod is provided inside a hole in a lower portion of the bolt casing with a lock, so that a lower end of the motion sensor rod contacts the electrical equipment cover plate; or the motion sensor with the motion sensor rod is provided nearby the key and the lock core inside the bolt casing with a lock, so that the motion sensor rod contacts the key or the lock core; or the motion sensor is a switch with audible or visible presentation, a button, or a reed switch, and a magnetic piece is mounted on a bolt head, wherein upon the motion sensor approaching the bolt head to a certain distance, the motion sensor acts and sends out an audible or visible alarm.