A low-voltage DC circuit breaker arc extinguishing chamber and circuit breaker
A low-voltage direct current, circuit breaker technology, applied in the direction of circuit breaker parts, circuits, electrical components, etc., can solve the problems of breaking failure, contact and arc extinguishing grid burnt, and other problems, so as to avoid side burning, safe and effective The effect of breaking
Active Publication Date: 2022-07-12
BEIJING SOJO ELECTRIC
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Problems solved by technology
[0004] like figure 1 , 2 As shown, for the multi-fracture technical scheme, the synchronization requirements between the multi-fracture contacts are very high when breaking, and the voltage shared by each fracture must be consistent. When breaking, the DC arc at one of the fractures is subjected to lateral magnetic blowing of the bypass fracture to generate side burning. The transverse magnetic blowing is generated by the electric force of the arc between the fractures. The arc grid was seriously burned, which made the breaking failure
Method used
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[0032] like Figure 5 shown, combined with Figure 6-13 As shown, the arc extinguishing chamber of the low-voltage DC circuit breaker in the present invention includes a first insulating shell frame 201, a second insulating shell frame 202 and an arc-quenching grid group 100, and the arc-quenching grid group 100 is installed on the oppositely arranged second Between a support plate 104 and a second support plate 105, the first support plate 104 and the second support plate 105 are respectively mounted on the first insulating shell frame 201 and the second insulating shell frame 202, the first insulating shell The frame 201 and the second insulating shell frame 202 are respectively provided with a magnetic shielding group arranged opposite to the arc extinguishing grid group 100, the magnetic shielding group includes a first magnetic conducting sleeve 301 and a second magnetic conducting sleeve 302, so The first magnetically conductive sleeve 301 is sleeved with the second mag...
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The invention discloses an arc-extinguishing chamber of a low-voltage direct current circuit breaker, which comprises a first insulating shell frame, a second insulating shell frame and an arc-extinguishing grid plate group, and the arc-extinguishing grid plate group is installed on a first support plate and a second Between the two supporting plates, the first supporting plate and the second supporting plate are respectively mounted on the first insulating casing frame and the second insulating casing frame, and the first insulating casing frame and the second insulating casing frame are respectively provided with magnetic shielding groups, The magnetic shielding group includes a first magnetic conductive sleeve and a second magnetic conductive sleeve, the first magnetic conductive sleeve is sleeved with a second magnetic conductive sleeve, and a non-magnetic conductive insulation is arranged between the first and second magnetic conductive sleeves layer, the magnetic permeability of the first magnetically permeable sleeve is lower than that of the second magnetically permeable sleeve. The invention also discloses a low-voltage DC circuit breaker using the above-mentioned arc extinguishing chamber. The purpose is to provide a low-voltage DC circuit breaker arc extinguishing chamber and a circuit breaker, the arc extinguishing chamber has a magnetic shielding function, so as to avoid side burning of the circuit breaker when it is opened, so that the circuit breaker can be interrupted safely and effectively.
Description
technical field [0001] The invention relates to the field of circuit breakers, in particular to an arc extinguishing chamber of a low-voltage DC circuit breaker and a circuit breaker. Background technique [0002] As one of the most important components in the low-voltage DC power distribution system, the low-voltage DC circuit breaker is widely used in important power stations, substations, communication base stations and data centers. Its stable and reliable operation ensures the safety of key sectors such as power systems and communications. In addition, low-voltage DC circuit breakers are also widely used in urban rail transit systems, ship power systems and emerging photovoltaic systems to ensure the safety of power distribution systems, electrical equipment and photovoltaic systems. [0003] Different from the power frequency current, the DC current has no natural zero-crossing point. In the process of breaking the DC current, the arc extinguishing and regulation are ...
Claims
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IPC IPC(8): H01H9/34H01H73/18H01H1/64
CPCH01H9/34H01H73/18H01H1/64Y02E10/56
Inventor 孔国威谢顺亮魏杰秦保平刘新李萍
Owner BEIJING SOJO ELECTRIC