Dual-power supply change-over switch

Abstract

The invention provides a dual-power supply change-over switch, and belongs to the technical field of switching devices. The dual-power supply change-over switch comprises: an operating mechanism and a main shaft connected with the operating mechanism, wherein the main shaft is driven by the action of the operating mechanism to rotate between a first contact closed position and a second contact closed position, and the middle of the stroke of the main shaft rotating from one closed position to the other closed position is the middle position; the device further comprises an auxiliary closing mechanism connected with the main shaft, when the main shaft rotates from one closing position to the middle position, the main shaft drives the auxiliary closing mechanism to store energy, and when the main shaft rotates from the middle position to the other closing position, the main shaft drives the auxiliary closing mechanism to store energy. the auxiliary closing mechanism releases energy to provide assistance for rotation of the main shaft. According to the invention, the contact system can be helped to quickly reach the closing position, the requirement on the force value of the energy storage spring of the operating mechanism can be reduced, and the overall service life of the operating mechanism can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of switching appliances, and in particular relates to a dual power supply conversion switch. Background technique [0002] Automatic transfer switching equipment (ATSE) is mainly used in industries, medical care, post and telecommunications, petroleum, coal, metallurgy, rail transit, computer centers, military facilities, airports, fire protection and important civil buildings, etc., which require relatively high continuity of power supply In the distribution network of primary load and secondary load, it is used to ensure the continuity of load power supply. [0003] The high reliability, modularization and miniaturization of electrical products have already become the development direction in the field of electrical technology. Correspondingly, stricter reliability, modularization, and miniaturization design requirements. With the improvement of the short-term withstand current and the on-off index of th...

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Problems solved by technology

With the improvement of the short-term withstand current and the on-off index of the automatic transfer switch, the contact pressure between the dynamic and static contacts of the contact system increases correspondingly. In order to ensure the reliable operation of the driving movable contact, the operating mechanism needs to provide greater Closing energy, so that the mechanism spring energy of the structural system of the operating mechanism also increases accordingly. Under this requirement, on the one hand, the technical requirements for the mechanism spring are more stringent; The design requirements for components such as rotating levers are also increasing, and the drive with high spring force will have a corresponding adverse effect on the technical indicators such as the life and reliability of the entire operating mechanism, and the increase in force value and strength requirements makes components Increased size does not conform to the development trend of modularization and miniaturization

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