Contact, vacuum arc-extinguishing chamber and vacuum circuit breaker

Abstract

The invention relates to a contact for a vacuum arc-extinguishing chamber, a vacuum arc-extinguishing chamber and a vacuum circuit breaker. The contact comprises a conductive rod, a contact sheet anda supporting body; the conductive rod is provided with a contact seat with a hollow cavity; the contact sheet is fixed on the end surface of the contact seat; the supporting body is arranged between the contact seat and the contact sheet and is used for supporting the contact sheet; the supporting body comprises a supporting body main body; in the extending direction of the conductive rod, at least one of two end surfaces of the supporting body main body is provided with an insulating layer. With the insulating layer adopted, current flowing through the conductive rod can be prevented from flowing through the supporting body. In the prior art, part of current flows through a supporting body, while, annular current on the contact of the invention is increased, and a magnetic field generatedby the annular current on the contact is improved; and therefore, the arc extinguishing capability of the vacuum arc extinguishing chamber is enhanced, and the problem that the contact of the vacuumarc extinguishing chamber is easy to ablate in the prior art is solved.

Description

technical field [0001] The invention relates to the field of high-voltage electrical appliances, in particular to a vacuum interrupter contact, a vacuum interrupter and a vacuum circuit breaker. Background technique [0002] The vacuum interrupter is the core component of the vacuum switch, and it is responsible for cutting off the arc. The control and extinguishment of the arc is closely related to the control of the magnetic field by the contacts of the vacuum interrupter. The current magnetic field control technologies mainly include longitudinal magnetic structure and transverse magnetic structure. Magnetic structure, in which the longitudinal magnetic structure generates a circular current through the design of the contact structure, and then generates a longitudinal magnetic field parallel to the arc current, which makes the vacuum arc more uniform, reduces the accumulation of the vacuum arc, and reduces the burning of the arc on the contact surface Eclipse, with stron...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a vacuum interrupter contact to solve the problem that the vacuum interrupter contact is easily ablated in the prior art; the present invention is also to provide a vacuum interrupter to solve the current There is a problem that vacuum interrupters are not conducive to breaking large currents in the prior art; the purpose of the present invention is to provide a vacuum circuit breaker to solve the problem that vacuum circuit breakers in the prior art are not conducive to breaking large currents

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