A low-voltage withdrawable switch cabinet

Abstract

The invention relates to the field of switch cabinets, in particular to a low-voltage withdrawable switch cabinet, which includes a cabinet body, the cabinet body includes a control panel, a plurality of drawer units and warning lights, and the control panel is arranged on the side of the cabinet body facing the user. On one side wall, the warning light is arranged on the top side wall of the cabinet, and the plurality of drawer units all include drawers and drawer sliding chambers, and the drawers are slidably inserted in the drawer sliding chambers, and the front of the drawers The side wall is rotatably connected with a locking mechanism for preventing the drawer from sliding out of the drawer sliding chamber. The upper inner wall of the drawer sliding chamber is provided with an elastic reset device for controlling the opening and closing of the warning light. Each of the drawer sliding chambers Two vacuum circuit breakers are arranged symmetrically on the rear inner wall. The withdrawable switchgear can strictly guarantee the sequence of disconnection or connection of the circuit breaker and the isolating switch in the circuit during the power-on and power-off process, thereby effectively eliminating the potential safety hazards of the switch cabinet during the power-on and power-off process.

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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