An arc extinguishing chamber and a DC contactor using the arc extinguishing chamber

Abstract

The invention relates to an arc extinguish chamber and a direct current contactor adopting the arc extinguish chamber. The direct current contactor comprises a moving contact assembly and a stationary contact assembly, wherein an upper arc guide angle assembly bent upwards is arranged beside a moving contact of the moving contact assembly, a lower arc guide angle assembly bent downwards is arranged beside a stationary contact of the stationary contact assembly, the arc extinguish chamber is arranged between the upper arc guide angle assembly and the lower arc guide angle assembly, arc guide pieces are alternatively arranged in the arc extinguish chamber in a layering mode, an arc guide port is formed in one end of each arc extinguish piece, a plurality of arc extinguish ribs facing the interior of the arc extinguish chamber are arranged at the other end of each arc extinguish piece at intervals, and a metal piece connected in a bending mode is arranged at least on one arc extinguish rib. The arc extinguish chamber and the direct current contactor adopting the arc extinguish chamber resolve the problems in the prior art that the motion time of the electric arc in the arc extinguish chamber is too long, and the arc extinguish chamber is large in loss and short in service life under the conditions that currents are too strong or too weak, can rapidly pull the electric arc to the maximum, timely and effectively extinguishes the electric arc and is safe and durable.

Description

technical field [0001] The invention relates to a DC contactor, in particular to an arc extinguishing chamber and a DC contactor using the arc extinguishing chamber. Background technique [0002] With the development of my country's economy, DC power transmission and distribution in power systems and their control systems, such as the DC power supply of rail transit electric locomotives, and the DC power supply system in wind power generation have been widely used. The idea of ​​building a micro-grid and a DC distribution network has been proposed, but at present there is a lack of reliable DC electrical equipment, so it is imminent to develop new DC electrical equipment such as DC contactors, especially for high-voltage (1500V) high-current (800A) heavy The DC contactor for the task (DC5) is urgently needed. [0003] As we all know, in the process of breaking the fault current, normal working current and critical current, arcs are generated between the moving and static cont...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the prior art, the electric arc moves in the arc extinguishing chamber for too long, especially when the current is too high, the high temperature of the arc causes large loss of the arc extinguishing chamber and short life. Quickly pull the arc to the maximum, timely and effectively extinguish the arc, safe and durable high-voltage and high-current DC contactor with integrated arc extinguishing device

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