Arc extinguishing device with integral arc isolating cover, and arc extinguishing method

Abstract

The invention provides an arc extinguishing device with an integral arc isolating cover, and an arc extinguishing method. The arc extinguishing device with the integral arc isolating cover comprises an arc extinguishing chamber and the arc isolating cover; the arc extinguishing chamber comprises a left arc isolating plate, a right arc isolating plate and a plurality of arc extinguishing grids; thecutting arc parts of all the arc extinguishing grids are arranged in a fan shape by taking a rotating shaft as a circle center, namely, in a direction from bottom to top; an inclination angle of arranging the cutting arc parts of the arc extinguishing grids is gradually increased; and an axis extension line of each arc extinguishing grid passes through the rotating shaft. The advantages are as follows: the arc extinguishing grids with different lengths and different thicknesses are designed in the arc extinguishing chamber, and the arc extinguishing grids are designed to be arranged in a fanshape in a staggered mode, so that rapid arc extinguishing can be realized, and the arc extinguishing effect can be improved. The service life, the breaking capacity, the use safety and the power supply reliability of a circuit breaker are prolonged and improved.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to an arc extinguishing device with an integral arc shield and an arc extinguishing method. Background technique [0002] Circuit breakers are important control and protection appliances in power distribution appliances. They are mainly used in industrial low-voltage power systems to connect and break currents in grid circuits and protect circuits and power supply equipment from overload, undervoltage, short circuit, single The hazards of phase-to-ground faults. When the circuit breaker breaks the overload current, it is mainly completed by the arc extinguishing device. During the process of breaking the large current, an arc will be generated between the moving contact and the static contact. Since the arc is conductive, if it cannot be extinguished in time, it will continue to burn. Damage to the circuit breaker will directly affect the curre...

AI Technical Summary

Problems solved by technology

However, the existing arc extinguishing device mainly has the following problems: when breaking a large current, the arc extinguishing effect is limited, and it is easy to cause the arc to spray back into the circuit breaker, thereby causing the circuit breaker to burn out

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