Small-sized fixed type switch cabinet for realizing five-prevention by single-hole single-shaft operation and control method for small-sized fixed type switch cabinet

Abstract

The invention discloses a small-sized fixed type switch cabinet for realizing five-prevention (five kinds of anti-misoperation shown as the specification) by a single-hole single-shaft operation and a control method for the small-sized fixed type switch cabinet. The fixed type switch cabinet comprises a cabinet body; the cabinet body is divided into a bus disconnecting switch chamber, a circuit breaker chamber, an instrument chamber, a cable chamber and a small bus chamber on the top of the cabinet by partition plates, wherein an upper disconnecting switch is mounted in the bus disconnecting switch chamber; a circuit breaker, a current transformer and a single-hole single-shaft operation mechanism are mounted in the circuit breaker chamber; a lower disconnecting switch or a grounding switch is mounted in the cable chamber; and the parts in the cabinet body are connected through busbars. According to the small-sized fixed type switch cabinet for realizing five-prevention by the single-hole single-shaft operation and the control method for the small-sized fixed type switch cabinet provided by the invention, the single-hole single-shaft operation mechanism is linked with the circuit breaker, the disconnecting switches, the grounding switch and cabinet door interlocking apparatuses of the chamber for realizing anti-misoperation reliably; and the fixed type switch cabinet has the characteristics of small size, high universality and the like.

Description

technical field [0001] The invention relates to a miniaturized fixed switchgear with one-hole and one-axis operation to realize five defenses and a control method thereof, belonging to the technical field of electric equipment. Background technique [0002] Conventional fixed switch cabinets (referred to as fixed cabinets) mainly include XGN2-12 and XGN66-12 types, which are relatively large (XGN2-12 type: width 1200 × depth 1200 × height 2650; XGN66-12 type width 900 × depth 900 × height 2200), generally adopts the JSXGN type locking operation mechanism, which will have the following defects: [0003] 1. The JSXGN locking operating mechanism occupies a large size and needs to be installed separately on the cabinet frame, occupying an independent channel, so that the width of the cabinet cannot be miniaturized; [0004] 2. The upper isolating switch, the lower isolating switch, and the grounding switch are operated independently by three operation holes, and the procedure i...

AI Technical Summary

Problems solved by technology

[0003] 1. The JSXGN locking operating mechanism occupies a large size and needs to be installed separately on the cabinet frame, occupying an independent channel, so that the width of the cabinet cannot be miniaturized;

[0004] 2. The upper isolating switch, the lower isolating switch, and the grounding switch are operated independently by three operation holes, and the procedure is cumbersome;

[0005] 3. The rotating disc of the locking operating mechanism has a large rotation range, low transmission efficiency, and large operating force, often causing incomplete separation and closing;

[0006] 4. The interlock with the circuit breaker is complicated and the reliability is poor, and the front and rear doors are locked by program locks;

[0007] 5. The connecting rod between the isolating switch and the grounding switch passes through the partition between the compartments, and the protection level is low

[0008] Due to the above shortcomings, the conventional 12kV fixed switchgear cannot be miniaturized and cannot meet the development needs of customers. It is urgent to develop a highly reliable miniaturized fixed switchgear

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