Blocking against misoperation, alarming and protecting device of high-voltage switch cabinet

Abstract

The invention discloses a blocking against misoperation, alarming and protecting device of a high-voltage switch cabinet. The back door of the high-voltage switch cabinet prevents entering a system by mistake with electricity, and an electrified display DD2 and an electromagnetic lock DS close the back door of the switch cabinet; an electrified display DD1, an electromagnetic lock contact DS1 of the back door of the high-voltage switch cabinet and a voice alarm BJQ are connected in series to form an electrified voice prompt alarming loop; the electrified display contact DD1, a back door stroke contact QS1, an intermediate relay KB1, a normally open contact KB1 and a singlechip P3.2 signal input port are connected in series to form a singlechip 89C51 signal input circuit; the device singlechip 89C51 outputs power supply trip, unit alarming and accident recording circuits after sequential operation, thus making up the bug of an anti-misoperation system; the invention has blocking for preventing misoperation of workers, has voice prompt alarming for preventing misoperation of workers and is provided with a tripping system cutting off the power supply when workers are in dangerous voltage. The invention can ensure personnel safety of workers and avoid personal injury and death.

Description

Technical field [0001] The invention belongs to the technical field of power supply equipment. Background technique: [0002] 1. When the high-voltage live switchgear is in the live running state, the door on the back of the switchgear is closed and locked. Locking method 1. When the grounding switch of the high-voltage switchgear is not closed, the back door of the high-voltage switchgear is mechanically locked, which is mostly used for line switchgear. Locking mode 2. The high-voltage switchgear implements electrical locking on the back door through the live display, which is mostly used for bus PT, bus tie, and incoming line switchgear. However, the mechanical lock linked with the grounding knife switch will be mistaken for the lack of mechanical action of the lock and be easily released. The electrical lock can be easily opened by the universal key of the electromagnetic lock. When this weak line of defense is lost, the staff will easily get an electric shock accident...

AI Technical Summary

Problems solved by technology

When the static contact is charged, if the staff does not pay attention, it is easy to cause an electric shock accident

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