A circuit breaker contact system
A contact system and circuit breaker technology, which is applied in the field of high and low voltage switchgear, can solve the problems of reducing the operation quality and cost of the power grid, excessive arcing of contacts, and limitation of carrying capacity, etc., achieving simple structure and reducing circuit breaker failures , The effect of switch safety
Active Publication Date: 2019-09-13
徐州新电高科电气有限公司
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Problems solved by technology
This structure is unreasonable, because it is a point or line contact, the contact surface is too small, resulting in a limited current carrying capacity, and there will also be excessive contact arcing, heat generation, etc., and even a fire. Potential safety hazards, will also reduce the quality and cost of power grid operation
Method used
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[0030] The present invention will be further described below in conjunction with the accompanying drawings.
[0031] Such as Figure 1 to Figure 8 As shown, the circuit breaker contact system includes a static contact arm square contact 1-1 located at one end of the static contact arm 1, a ring groove square contact 5-1 located at one end of the movable contact arm 5, and a contact plate bracket 7 and The current-carrying circuit breaking system formed by the contact plate 2;
[0032] The contact plate 2 is provided with four pieces, all of which are elongated structures. The four contact plates 2 are successively installed in the contact plate slot 7-4. The top surface and both sides of each contact plate 2 are planes. There is a pressure spring hole 2-1, and the bottom surface is provided with a boss contact surface 1 2-3 and a boss contact surface 2 2-4 in the same plane;
[0033] The contact plate support 7 is riveted with a support pin 7-1, and is provided with a connec...
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The invention discloses a circuit breaker contact system. The circuit breaker contact system comprises a current-carrying circuit switching-on / off system composed of a static contact arm square contact (1-1) arranged at one end of a static contact arm (1), an annular groove square contact (5-1) arranged at one end of a movable contact arm (5), a contact plate bracket (7) and a contact plate (2). By adopting the circuit breaker contact system disclosed by the invention, the contact area of a conductor contact of a circuit breaker can be improved by 5 times or more and the probability that the contact generates heat and has faults is effectively reduced; meanwhile, the current-carrying capacity of the contact of the circuit breaker can be greatly improved so that the circuit breaker is saferand more reliable to operate and switch on and off; smooth plane contact is formed by the contact plate and a contact conductor and contact resistance is stable; the circuit breaker contact system has a self-cleaning effect and the contact is slightly bounced when the system is switched on; when short-circuit current passes, the contact is also very stable; the circuit breaker contact system hasa relatively simple structure and small manufacturing difficulty; the production cost is reduced to the greatest extent; the contact area of the contact is greatly improved so that the probability that the circuit breaker has faults caused by the fact that the contact has faults and fire accidents are caused by the fact that the contact is overheated is remarkably reduced.
Description
technical field [0001] The invention relates to a circuit breaker contact system, which belongs to the technical field of high and low voltage switch cabinets. Background technique [0002] A circuit breaker is an electrical and power grid protection device that can manually open or close live circuits and automatically disconnect overload circuits or short-circuit circuits, and the circuit breaker contact system is the most critical core component of the circuit breaker. [0003] The most widely used on high and medium voltage circuit breakers in the prior art is the quincunx contact system, which forms line contact with the circular conductor through the two edges of the inner circle of a group of contact fingers arranged in parallel around the circumference of the conductor . This structure is unreasonable, because it is a point or line contact, the contact surface is too small, resulting in a limited current carrying capacity, and there will also be excessive contact ar...
Claims
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IPC IPC(8): H01H73/04H01H1/06H01H1/28H01H1/60H01H1/62
Inventor 白春光冯仰怀王敏李炎王月民王云飞
Owner 徐州新电高科电气有限公司