automatic transfer switch

Abstract

The invention relates to an automatic change-over switching apparatus, which comprises a main circuit device and a change-over operation device. The change-over operation device includes a support assembly, an electromagnet assembly and an elastic energy storage assembly mounted on the support assembly, and a rotating shaft assembly connected with the electromagnet assembly and the elastic energystorage assembly. The rotating shaft assembly includes a rotating shaft rotationally mounted on the support assembly and an eccentric wheel mounted on the rotating shaft. The rotating shaft extends out of the support assembly and is connected with a moving contact assembly of the main circuit device to drive the moving contact assembly to rotate. When the electromagnet assembly is powered on, therotating shaft assembly is driven to rotate to storage energy for the elastic energy storage assembly. After the electromagnet assembly is powered off, the eccentric wheel drives the rotating shaft tocontinue to rotate in the same direction by using the inertia thereof under the combined action of the elastic energy storage assembly. Therefore, large-rotation-angle movement of the rotating shaftassembly is realized, the opening distance of the connected moving contact assembly is increased, and the breaking index can be improved.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, and more specifically relates to an automatic transfer switch electrical appliance. Background technique [0002] The transfer switch appliance is a common low-voltage electrical appliance, which is often used in important power distribution occasions (such as hospital power supply systems) to switch between two power supplies. When the common power supply fails during the power supply process, it will quickly switch to the backup power supply to ensure load normal power supply at the terminal. [0003] At present, in the contact structure of the existing two-stage automatic transfer switch electrical appliances, the movable contact is usually movable and the static contact is fixed. When the automatic transfer switch is switching the power supply, it mainly realizes the power switching by driving the moving contact to rotate through the action of the switching operation device. ...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the structure of the switching operation device, the rotation angle of the moving contact shaft is small (usually within 60 degrees), so that the opening distance between the moving and static contacts is small, which limits the improvement of its arc extinguishing performance. The improvement of breaking capacity is also limited

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