Mechanical interlock mechanism of high-voltage segregate switch with vacuum contactor and high-pressure chamber cabinet door

Abstract

The invention discloses a mechanical interlock mechanism for a high-voltage isolating switch, a vacuum contactor and a hyperbaric cabinet door, belonging to the high-voltage whole-set electrical device safety protective device technical field. The invention comprises a first mechanical lockup device arranged on the inner wall of the door of the hyperbaric cabinet, a second mechanical lockup device arranged on the outer wall of the door of the hyperbaric cabinet, and a key for locking or unlocking the first mechanical lockup device and the second mechanical lockup device; the first mechanical lockup device is arranged at the edge of the door of the hyperbaric cabinet. The invention has the advantages of simple structure, high reliability; and only a mounting hole for the bolt of the first mechanical lockup device is arranged on the door, so the invention is of convenient installation; the cost of the first mechanical lockup device and the second mechanical lockup device is just one-tenth of the prior device, so the invention is of good economy; the first lockup device and the second mechanical lockup device are both controlled by the same key, that is, the first lockup device and the second lockup device use a common key, so the invention is of safety and reliability.

Description

technical field [0001] The invention belongs to the technical field of safety protection devices for high-voltage complete sets of electrical equipment, and more specifically relates to a mechanical interlocking mechanism of a high-voltage isolating switch, a vacuum contactor, and a cabinet door of a high-voltage chamber. Background technique [0002] In high-voltage complete sets of electrical equipment, the safety protection habits for isolating switches, vacuum contactors, vacuum circuit breakers, metering handcarts, and cabinet doors are called five defenses. As is well known, the main circuit is composed of an isolating switch, a vacuum contactor and a high-voltage load, wherein the high-voltage load is controlled to be turned on or off by the isolating switch and the vacuum contactor. If the aforementioned load is a high-voltage capacitor, then the high-voltage electrical cabinet is called a high-voltage capacitor cabinet, and then simply called a capacitor cabinet. I...

AI Technical Summary

Problems solved by technology

In this way, when there is high voltage in the cabinet, the display lights up to remind people that there is electricity, and at the same time the electromagnetic lock is locked, and the cabinet door cannot be opened.

The disadvantage of this design is that the cost of the required components is high, and the holes for installing the live display and the electromagnetic lock must be opened on the cabinet door, especially when the cabinet door is in the open state, because the electromagnetic lock does not work, it must also be installed. Take measures to lock the isolating switch and prevent it from closing (in this system, only the electrical interlocking method of adding a travel switch on the door and interlocking the vacuum contactor can be used); The well-known LWR (KK) transfer switch in the industry is controlled by a program lock. This design cannot use the button to operate the vacuum contactor, and it needs to open a hole on the cabinet door to install the program lock. The entire operation steps are cumbersome and expensive. high

[0004] To sum up, since the current technical measures to realize the five-proof interlocking of the isolating switch, the vacuum contactor, and the high-voltage cabinet door are all embodied in the non-mechanical structural design, it is inevitable to reflect that the wiring is complicated and the installation work is complicated. Lock, poor reliability, high failure rate, troublesome operation, uneconomical

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