Commutation locker cabinet electric arc protecting equipment

Abstract

The invention relates to a rectifying cabinet electric arc protective device, which comprises a power module supplying power to the whole electric arc protective device, an arc detection main unit for managing and controlling the whole electric arc protective device, an arc detection assistant unit for collecting the light information from an arc sensor, an over-current detection unit for generating the tripping logical function, and an arc detection probe. The invention is characterized in that the arc detection probe is connected with the arc detection main unit and the arc detection assistant unit through a long optical fiber with photosensitive property at the front section. Moreover, the invention has advantages of ensuring the rectifying device to quickly and selectively cut the failure set or the feeding breaker when in arc fault, thereby radically limiting the duration of the failure arc and eliminating the harm to various personnel and devices caused by arc short circuit as well as reducing the sever economic loss brought about by accident expansion.

Description

1. Technical field: [0001] The invention relates to an arc protection device for a rectifier cabinet, in particular to a protection device for arc fault protection of a silicon rectification device used in a power supply rectification system in the electrolytic aluminum industry. 2. Background technology: [0002] Silicon rectification device (rectification cabinet) is the main equipment of aluminum electrolysis power supply rectification station, its safety and reliability directly affect the normal operation of electrolysis production. With the continuous expansion of the production scale of aluminum electrolysis, the capacity of the silicon rectification device also increases. When an arc short circuit fault occurs, due to the huge short circuit capacity, the rectifier cabinet will generally explode, resulting in a complete power outage of the electrolysis series. The total power failure of the electrolysis series and the equipment accident of the rectification system cau...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to ensure that the rectifier equipment can be quickly and selectively disconnected when an arc fault occurs, aiming at the particularity of the application field of the aluminum industry and the problem that the existing protection system cannot disconnect the arc fault point in time, resulting in the expansion of equipment faults Faulty units or incoming line circuit breakers fundamentally limit the duration of fault arcs, eliminate various personnel and equipment hazards caused by arc short circuits, and at the same time reduce major economic losses caused by accident expansion Provide a rectifier cabinet arc protection device

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