Contact collision buffer device and sulfur hexafluoride breaker using the same

Abstract

The invention relates to a contact collision buffer device in the field of a high-voltage electrical apparatus and a sulfur hexafluoride breaker using the same. The contact collision buffer device includes a guide seat and a contact guide rod orientedly mounted on the guide seat, and further includes a spring used for providing an elastic reactive force for contact when the contact on the contactguide rod is collided. One end of the contact guide rod is used for mounting a contact, and the other end is connected with a damping structure; and the damping structure comprises a piston cylinder and a piston disposed in the piston cylinder, wherein the contact rod is fixedly connected with the piston, and the piston is provided with damping holes. When the contact collision buffer device is used, the contact is mounted on the contact guide rod, and the action of the guide rod is buffered by the damping structure, so that separation of a moving contact and a static contact can be achieved relatively quickly, and repeated collision between the two contacts is avoided. Compared with the prior art, the impact of contact collision on the breaker is small, and breaker members are not easilydamaged.

Description

technical field [0001] The invention relates to a contact collision buffer device in the field of high-voltage electrical appliances and a sulfur hexafluoride circuit breaker using the device. Background technique [0002] 550kV sulfur hexafluoride (SF6) circuit breaker, as the source equipment of the power transmission and transformation industry, plays a vital role in the safety and reliability of the power grid; in order to weaken the electromagnetic oscillation and limit the operating overvoltage when closing the long line without load , generally by setting the closing resistor to absorb part of the electric energy in the grid and transform it into heat energy. The closing resistor circuit is generally connected in parallel with the main circuit. When closing, the two resistance contacts of the closing resistor are closed first, and are connected in series with the resistor to form a flow circuit. After the closing resistor is connected for about 10ms, the main break i...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a contact collision buffer device to solve the problem that the components of the circuit breaker are easily damaged when the resistance moving and static contacts in the sulfur hexafluoride circuit breaker collide; the object of the present invention is also To provide a sulfur hexafluoride circuit breaker using the device

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