AC high voltage vacuum breaker

Abstract

The invention relates to an alternating current high-voltage vacuum circuit breaker, which is characterized in that the invention comprises a case body, a vacuum arc extinguish chamber is seated and connected to the case body, an electromagnetic repulsive force mechanism is disposed in the case body, the mechanism comprises an open coil and a close coil which form a fixed gap, a repulsion disk arranged in the gap, a repulsion rod which is fixedly penetrated by the equipped repulsion disk, a retention capacity rod of a composite disc spring retention force structure connected with the lower end of the repulsion rod, a catch spring fixed on the retention force rod and at least two pieces of disc springs top-arranged on the catch spring. The upper end of the electromagnetic repulsive force is connected with a closing buffer gear which comprises a spring frame structure and a hydraulic cylinder, further, the closing buffer gear comprises an intelligent pulse generator. Because the invention employs the electromagnetic repulsive force mechanism, employs bi-stable composite disc springs to retain, employs the closing hydraulic pressure buffer gear to inhibit closing bouncing, and employs a photoelectric sensor to realize position returning, thereby belonging to the advanced design at home and abroad, therefore, the invention can be widely applied to the field of fault current limiters, phase selection switches, solid change-over switches and the like.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to an AC high-voltage vacuum circuit breaker with fast closing and opening. Background technique [0002] With the continuous development of the national economy, the grid structure and load characteristics are becoming more and more complicated. Many sensitive electrical loads connected to the power system are extremely vulnerable to short-term disturbances from the power system, such as voltage dips and voltage surges. Power quality and operational reliability place increasingly stringent requirements. Therefore, in order to protect sensitive important industrial loads and improve the power quality of the power system, high-voltage circuit breakers, protective devices, are required to have very high-speed closing and opening characteristics, that is, very short closing and opening times. [0003] At present, high-voltage circuit breakers generally use spring operating mechanisms, electromagne...

AI Technical Summary

Problems solved by technology

The closing and opening holding force of Mitsubishi's fast circuit breaker is provided by a single disc spring. Although the structure of this disc spring is simple, the manufacturing process is complicated, and the output characteristics of any disc spring have been fixed, so the design flexibility is not high; The domestic technology is still in the immature stage before, and the closing time, opening time, and position return response time are relatively long.

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