Contact box and switch cabinet using same

Abstract

The invention relates to accessories for power equipment, and in particular relates to a contact box and a switch cabinet using the contact box. The contact box includes a box body and a ventilation passage which runs through the entire box body. When the box body is used, a heat dissipation hole is arranged at a position directly above the cooperation site of a moving contact and a static contact. A retaining wall is arranged on the edge, which is close to a cabinet board, of the heat dissipation hole in use. The box body is provided with a partition member corresponding to the heat dissipation hole. The partition member divides the heat dissipation hole into more than two heat dissipation channels. The switch cabinet comprises a cabinet body and the contact box. The static contact is fixedly connected in the contact box. The moving contact is cooperatively connected with the static contact in the contact box. The contact box adopting the structure has high heat dissipation efficiency, and at the same time avoids the influence of an electric field on the electrical performance of the contact box when the hole is arranged above the cooperation site of the moving contact and the static contact. When the contact box is placed in the switch cabinet, the contact box can meet the requirements of the protection level and is very practical.

Description

technical field [0001] The invention relates to a matching accessory of electric equipment, in particular to a contact box and a switchgear using the same. Background technique [0002] The carrying current in the switchgear can generally reach 3150-4000A. Due to the large carrying current in the switchgear, the contact box used in the switchgear will generate a lot of heat at the joint between the dynamic and static contacts. The heat generated cannot be dissipated from the contact box quickly, so that the heat accumulated in the contact box is getting bigger and bigger, and the temperature rise is easy to occur at the contact part of the dynamic and static contacts, and it is easy to cause the temperature to rise for a long time. The contacts are oxidized, and the contact resistance further increases, resulting in damage to the insulation structure, resulting in a short circuit, reducing the service life and safety performance of the equipment, and affecting the use of the...

AI Technical Summary

Problems solved by technology

Although this opening position increases convection heat dissipation and can reduce the temperature rise at the lap joint of the dynamic and static contacts, the size of the opening is limited due to the protection level requirements, and the opening position is relatively far away from the contact part of the dynamic and static contacts. Far, which is not conducive to rapid heat dissipation at the lap joints of dynamic and static contacts

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