A new type of switchgear handcart grounding device

Abstract

The invention discloses a novel handcart grounding device of a switch cabinet, which comprises a handcart grounding contact, a cabinet body grounding bar and a fixing board, wherein the handcart grounding contact comprises a handcart grounding bar, a handcart grounding strip I, a handcart grounding strip II, a spring I, a spring II, a bolt I and a bolt II; the fixing board is fixed on a cabinet body bottom board, and the cabinet body grounding bar is fixed on the fixing board; and the handcart grounding contact is fixed on the front end surface of the high-voltage side of a handcart bottom board. The invention has the characteristics of low integral cost, strong matching property, high electrical parameters, strong generality and the like; and when a handcart is pushed in or pulled out, the precise positioning of the handcart can be realized by the interaction between the handcart grounding contact and the cabinet body grounding bar.

Description

technical field [0001] The invention relates to a grounding device for a handcart of a switch cabinet. Background technique [0002] In order to protect the safety of the operator during the use of the switchgear, all accessible parts should be reliably grounded. The grounding of the handcart of the switch cabinet is connected to the grounding bar of the handcart of the cabinet through the grounding contact of the handcart to realize reliable grounding of the handcart, thereby protecting the safety of personnel and equipment. [0003] The existing handcart grounding device has the following problems: [0004] 1. The grounding contact of the conventional handcart is located on the bottom plate of the handcart, and the installation of the grounding contact is inconvenient and the maintenance is difficult; [0005] 2. Since the circuit breaker handcart needs to install an energy storage motor on the bottom plate, the grounding contact is close to the side of the handcart pane...

AI Technical Summary

Problems solved by technology

[0004] 1. The grounding contact of the conventional handcart is located on the bottom plate of the handcart, and the installation of the grounding contact is inconvenient and the maintenance is difficult;

[0005] 2. Since the circuit breaker handcart needs to install an energy storage motor on the bottom plate, the grounding contact is close to the side of the handcart panel, so the ground row of the cabinet handcart is correspondingly lengthened, resulting in waste of copper bars;

Due to the small contact surface and the limited pressure of a single spring, the contact resistance is relatively large, and it is difficult to release the fault current (the ground loop test is not easy to pass);

[0007] 4. When the handcart is advancing, due to the inclination of the handcart, the grounding contact of the handcart is easy to collide with the grounding row of the handcart in the cabinet, causing the deformation of the grounding contact and making the handcart unable to be effectively grounded;

[0008] 5. The conventional handcart is positioned by the opening of the wheel frame and the positioning pin of the cabinet, and it can only be realized when the handcart reaches the working position, and the positioning is unreliable

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