Low-voltage draw-out type switch cabinet

Abstract

The invention relates to the field of switch cabinets, in particular to a low-voltage draw-out switch cabinet. The cabinet comprises a cabinet body, the cabinet body comprises a control panel, a plurality of drawer units and a warning lamp. The control panel is arranged on the side wall of the side, facing a user, of the cabinet body. The warning lamp is arranged on the side wall of the top of thecabinet body; each drawer unit comprises a drawer and a drawer sliding cavity; the drawer is inserted into the drawer sliding cavity in a sliding manner; the side wall of the front side of each drawer is rotationally connected with a locking mechanism used for preventing the drawer from sliding out of the corresponding drawer sliding cavity, an elastic reset device used for controlling the warning lamp to be turned on and off is arranged on the inner wall of the upper end of each drawer sliding cavity, and two vacuum circuit breakers are symmetrically arranged on the inner wall of the rear side of each drawer sliding cavity. According to the draw-out type switch cabinet, the sequence of disconnection or connection of the circuit breaker and the isolation switch in the loop can be strictlyguaranteed in the power-on and power-off process, and then potential safety hazards existing in the power-on and power-off process of the switch cabinet are effectively eliminated.

Description

technical field [0001] The invention relates to the field of switch cabinets, in particular to a low-voltage withdrawable switch cabinet. Background technique [0002] Low-voltage switchgear, as a unitized division switch electrical device, is widely used in power plants, chemical industry and other fields. The switchgear is combined into functional units through low-voltage switchgear, which can be effectively grouped for protection, conversion, and control operations. Generally, low-voltage switchgear is divided into fixed low-voltage switchgear and withdrawable low-voltage switchgear in structure. The withdrawable type is composed of a fixed cabinet and a movable device with main electrical components such as switches. The movable part needs to be replaced when it is replaced. Lightweight, reliable positioning after moving in, and drawers of the same type and specification can be reliably interchanged. The processing method of the drawer cabinet is basically similar to th...

AI Technical Summary

Problems solved by technology

The contacts of the isolating switch are all exposed in the air and have an obvious disconnection point. The isolating switch has no arc extinguishing device, so it cannot be used to cut off the load current or short-circuit current, otherwise, under the action of high voltage, the disconnection point will generate a strong arc , and it is difficult to extinguish by itself, and may even cause arcing (phase-to-ground or phase-to-phase short circuit), burn the equipment, and endanger personal safety. This is the so-called serious accident of "pulling the isolation switch with load". Isolating switch, close circuit breaker or load switch after power-off operation: first disconnect the circuit breaker or load switch, and then disconnect the isolating switch. The general switch cabinet design cannot absolutely guarantee the power-on and power-off action of the isolating switch and circuit breaker The sequence requirements, so there is a serious security risk

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