Low-voltage direct-current circuit breaker arc extinguish chamber and circuit breaker
A low-voltage DC, circuit breaker technology, applied in circuit breaker parts, circuits, electrical components, etc., can solve problems such as burnout of contacts and arc-extinguishing grids, failure of breaking, and differences
Active Publication Date: 2021-05-11
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 frame 201, a second insulating frame 202, and an arc extinguishing grid group 100, and the arc extinguishing 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 installed on the first insulating frame 201 and the second insulating frame 202 respectively, and the first insulating frame 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, and the magnetic shielding group includes a first magnetically conductive sleeve 301 and a second magnetically conductive sleeve 302. The second magnetically conductive sleeve 302 is set inside the first magne...
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The invention discloses a low-voltage direct-current circuit breaker arc extinguish chamber. The arc extinguish chamber comprises a first insulating shell frame, a second insulating shell frame and an arc extinguish grid piece set, the arc extinguish grid piece set is installed between a first supporting plate and a second supporting plate which are oppositely arranged, and the first supporting plate and the second supporting plate are installed on the first insulating shell frame and the second insulating shell frame respectively. The first insulating shell frame and the second insulating shell frame are respectively provided with a magnetic shielding group, each magnetic shielding group comprises a first magnetic conductive sleeve and a second magnetic conductive sleeve, the second magnetic conductive sleeves are sleeved in the first magnetic conductive sleeves, non-magnetic conductive insulating layers are arranged between the first magnetic conductive sleeves and the second magnetic conductive sleeves, and the magnetic conductivity of the first magnetic conductive sleeves is lower than that of the second magnetic conductive sleeves. The invention further discloses a low-voltage direct-current circuit breaker using the arc extinguish chamber. According to the low-voltage direct-current circuit breaker arc extinguish chamber and the circuit breaker, the arc extinguish chamber has a magnetic shielding function, so that side burning is avoided when the circuit breaker is switched on and off, and the circuit breaker can be switched on and off 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, low-voltage DC circuit breakers are widely used in important power stations, substations, communication base stations, and data centers. Its stable and reliable operation ensures the safety of key departments 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 power frequency current, DC current has no natural zero crossing point. During the breaking process of DC current, its arc extinguishing and regulation are much ...
Claims
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Patent Timeline
Login to View More 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