Arc extinguish chamber and low-voltage direct-current circuit breaker using same
An arc extinguishing chamber and arc extinguishing technology, which is applied to circuit breaker components, circuits, electrical components, etc., can solve problems such as burnt contacts and arc extinguishing grids, breaking failures, and inconsistencies
Inactive 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
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[0032] like Figure 5 shown, combined with Figure 6-13 As shown, the arc extinguishing chamber in the present invention includes a first insulating frame 201 and a second insulating frame 202 arranged oppositely, and an arc extinguishing grid is installed between the first insulating frame 201 and the second insulating frame 202 The sheet group 100, the first insulating frame 201 and the second insulating frame 202 are respectively provided with a magnetic shielding group 300 arranged opposite to the arc extinguishing grid sheet group 100, and the magnetic shielding group 300 includes a first magnetically conductive sleeve cylinder 301 and a second magnetically conductive sleeve 302, the first magnetically conductive sleeve 301 is fitted with a second magnetically conductive sleeve 302, between the first magnetically conductive sleeve 301 and the second magnetically conductive sleeve 302 There is a non-magnetic insulating layer 303, the first magnetic sleeve 301 and the seco...
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The invention discloses an arc extinguish chamber. The arc extinguish chamber comprises a first insulating shell frame and a second insulating shell frame which are oppositely arranged, an arc extinguishing grid piece set is installed between the first insulating shell frame and the second insulating shell frame, the first insulating shell frame and the second insulating shell frame are each provided with a magnetic shielding set, and each magnetic shielding set 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 arc extinguish chamber and the low-voltage direct-current circuit breaker using the same, 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 and a low-voltage DC circuit breaker using the same. 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 more d...
Claims
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IPC IPC(8): H01H9/34H01H73/18H01H1/64
CPCH01H1/64H01H9/34H01H73/18
Inventor 魏杰谢顺亮孔国威秦保平刘新李萍
Owner BEIJING SOJO ELECTRIC