An adjustable rotating magnetic field vacuum interrupter

Abstract

The invention provides an adjustable rotating magnetic field vacuum interrupter, comprising: a pair of conductive rods, a shield cover, a pair of disc-shaped contacts, an insulating shell, a rotating magnetic field generating device and an amplitude-frequency adjusting device; the insulating shell It is arranged on the outside of the shield; the rotating magnetic field generating device is fixed on the outside of the insulating shell and placed coaxially with the disc-shaped contact; the amplitude-frequency adjusting device is connected to the rotating magnetic field generating device to adjust The magnetic field generated by the rotating magnetic field generating device; the conductive rod is connected with the disc-shaped contacts; the pair of disc-shaped contacts are arranged coaxially and oppositely in the shielding case. In the technical solution provided by the present invention, the rotating magnetic field generators are all placed outside the insulating shell of the arc extinguishing chamber, avoiding the possibility of gas production, and the generated transverse magnetic field is more concentrated between the contacts, that is, at the arc, which is more conducive to contact disconnection.

Description

technical field [0001] The invention relates to a vacuum interrupter, in particular to an adjustable rotating magnetic field vacuum interrupter. Background technique [0002] With the continuous expansion of the grid capacity and the continuous improvement of the voltage level, the switchgear for the control and protection of the power system is faced with more severe working conditions and more stringent requirements. The vacuum switch uses high vacuum as the arc extinguishing and insulating medium. The contact and arc extinguishing system are simple, with high insulation level, easy maintenance, long electrical life, suitable for frequent operation, small size, light weight and other advantages. leading position. [0003] There are four commonly used contact structures for vacuum circuit breakers. They are disc-shaped flat-plate butt contact, spiral-type transverse magnetic contact, coil-type longitudinal magnetic contact, and cup-shaped longitudinal magnetic contact. ...

AI Technical Summary

Problems solved by technology

[0008] Therefore, in order to overcome the defect that the electrical life of the vacuum circuit breaker is reduced due to the uneven ablation of the contacts by the arc, the present invention provides an adjustable rotating magnetic field vacuum interrupter, including: a pair of conductive rods, a shielding cover, a For disc-shaped contacts, insulating shells, rotating magnetic field generating devices and amplitude-frequency adjusting devices;

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