Contact arc extinguishing device of a circuit breaker
A technology of arc extinguishing device and circuit breaker, which is applied in the direction of circuit breaker components, etc., and can solve problems such as unfavorable long-term use, contact damage, and poor arc extinguishing ability of circuit breakers.
Active Publication Date: 2021-11-19
NANJING APAITEK TECH
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Problems solved by technology
[0003] Most of the existing circuit breakers use the arc extinguishing grid structure, but due to the limitation of the space of the circuit breaker itself, the number of arc extinguishing grids is limited, resulting in poor arc extinguishing ability of the circuit breaker, and the arc extinguishing time is long. As a result, more contacts are damaged, which is not conducive to long-term use; in addition, most of the existing arc extinguishing structures have no heat dissipation effect, and the high temperature environment in the arc extinguishing chamber will also affect the use of circuit breakers
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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0020] see Figure 1-4 , the present invention provides a technical solution: a contact arc extinguishing device for a circuit breaker, including an arc extinguishing chamber 1 and a moving contact 2 and a static contact 3 provided inside the arc extinguishing chamber 1, the arc extinguishing chamber 1 The outer surface is surrounded by an air chamber, the air chamber is composed of an air storage chamber 4 and an exhaust chamber 5, and a temperature sensor 6 ...
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The invention discloses a contact arc extinguishing device of a circuit breaker, which comprises an arc extinguishing chamber and a moving contact and a static contact arranged inside the arc extinguishing chamber, an air chamber is arranged around the outer surface of the arc extinguishing chamber, the The gas chamber is composed of a gas storage chamber and an exhaust chamber. The arc extinguishing chamber is also equipped with a temperature sensor for detecting temperature. There are concave arc extinguishing teeth equidistantly arranged on the sheet, and an arc extinguishing gun head and an exhaust device are arranged between any two adjacent arc extinguishing sheets, and the exhaust device is located on the ray of the air flow of the arc extinguishing gun head , the arc extinguishing gun head and the exhaust device are all arranged on the inner wall of the arc extinguishing chamber, the gas storage chamber is also provided with a gas storage reminder device, and several exhaust holes are opened on the exhaust chamber, the present invention The beneficial effect is that the electric arc is blown out quickly, the cooling efficiency is good, and the safety is higher.
Description
technical field [0001] The invention relates to the technical field of circuit breaker arc extinguishing, in particular to a contact arc extinguishing device of a circuit breaker. Background technique [0002] A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. When the circuit breaker is disconnected, an arc will be generated. The high temperature generated by the arc will melt and vaporize the contact surface of the circuit breaker, burn out the insulating material, and cause great harm to the device. Therefore, the circuit breaker needs an arc extinguishing structure. Reduce the damage of arc to circuit breaker. [0003] Most of the existing circuit breakers use the arc extinguishing grid structure, but due to the limitation of the space of the circuit breaker itself, the number of arc extinguishing grids is ...
Claims
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IPC IPC(8): H01H73/18
CPCH01H73/18
Inventor 陈斐斐
Owner NANJING APAITEK TECH