Movable arc-suppression harmonic elimination device

Abstract

The invention relates to a movable arc-suppression harmonic elimination device comprising a cabinet shell. A closed space formed by enclosing the cabinet shell is divided by a metal partition board into a main bus chamber, an earthed switch chamber, a voltage transformer chamber and a secondary meter chamber, wherein the main bus chamber is positioned behind the cabinet shell; the secondary meter chamber, the voltage transformer chamber and the earthed switch chamber are sequentially arranged in front of the cabinet shell from the top to bottom; and an isolated handcart is arranged in the voltage transformer chamber, provided with a voltage transformer and a high-voltage fuse and pushed into a cabinet body along a guide rail or pulled out of the cabinet body. By using a middle part of the front of a KYN28 type switch cabinet body as an isolated handcart chamber, arranging the isolated handcart which is provided with the voltage transformer and the high-voltage fuse and used as a movable component in the isolated handcart chamber and using an outgoing line cable chamber as the earthed switch chamber, the invention solves the problem of layout space of element which cannot be overstepped by a miniaturized protective device and simultaneously ensures normal play of protecting function.

Description

technical field [0001] The invention relates to a removable arc suppression and harmonic elimination device. Background technique [0002] At present, the arc suppression and harmonic elimination devices used in the system are mostly fixed structures with series fuses. Once a single-phase arc ground fault occurs in the system, the faulty phase will be directly grounded through the vacuum contactor connected in series with the high-voltage current-limiting fuse. The ground arc is extinguished, and the arc ground overvoltage is eliminated, thereby avoiding the development of a single-phase arc ground fault into a phase-to-phase short circuit accident. Although the vacuum contactor meets the requirements of frequent operation of the arc suppression and harmonic elimination device, it cannot break the short-circuit current and must be used in series with the high-voltage current-limiting fuse, and the high-voltage current-limiting fuse needs to occupy a large cabinet space. The...

AI Technical Summary

Problems solved by technology

[0006] It can be seen from the above technical scheme that the present invention uses the middle position in front of the KYN28 switch cabinet body as an isolated handcart room, and arranges an isolated handcart equipped with voltage transformers and high-voltage fuses in the handcart room as removable parts. The outlet cable room is used as the grounding switch room, which solves the problem of component layout space that cannot be overcome when the protection device is miniaturized, and at the same time ensures the normal performance of the protection function

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