Switch device

Abstract

The invention provides a switch device. The switch device comprises an insulation housing which in movably and internally provided with an insulation beam, wherein the insulation beam is provided withat least one arc extinguishing structure; at least one set of contact portions, wherein each contact portion comprises a fixed contact and at least one moving contact which are in contact or separated from each other, the fixed contact is connected on the insulation housing, and the at least one moving contact is connected with the insulation beam. The switch device is provided with the at leastone arc extinguishing structure in the insulation beam so as to achieve a good arc extinguishing effect and effectively reduce the size of the switch device.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to a switchgear. Background technique [0002] At present, the requirements for miniaturization and high parameters of electrical products are gradually put forward in the market. Therefore, the isolating switch is required to be miniaturized and to meet the AC and DC switching and breaking capabilities, and to always meet the temperature rise requirements. At present, the common isolating switch and its contact system on the market use double breakpoints to make and break the current. In a limited space, it is difficult to extinguish the arc, so the contact surface of the contact will inevitably be burned, and even the product will be damaged. Unable to open and close normally and cause a short circuit. In product applications, low-voltage molded case circuit breakers and low-voltage disconnectors are used together as the main form of low-voltage power d...

AI Technical Summary

Problems solved by technology

[0006] 1. The existing isolating switch does not have a special arc extinguishing device, and cannot cut off the load current and short-circuit current. It is impossible to avoid the contact surface of the contact being ablated by the arc during use, and the contact quality cannot be guaranteed.

[0007] 2. Although some isolating switches are equipped with an arc extinguishing device, the arc extinguishing device is installed in the base of the isolating switch. This arrangement leads to a large distance between phases, which in turn leads to a large overall volume of the isolating switch. In addition, the isolating switch is in When connecting the molded case circuit breaker, it is necessary to transfer the busbar, and the corresponding installation space of the power distribution cabinet used together with it will also increase, causing inconvenience in installation and use

[0008] 3. The arc generated when the dynamic and static contacts of the isolating switch are separated will burn the surface of the contact, resulting in the failure of the isolating switch to work normally;

[0009] 4. There is still room for improvement in the short-time withstand current of the existing isolating switch

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