Full name: Dongguan City, 100 Xin Electrical Co., Ltd. Tel: 0769-22331546 Fax: 0769-22334100 Mobile: 13268792002 QQ: 2116885612 Contact: Li Daoyuan mail: 2116885612@qq.com Address: Dongguan City, Beverly Plaza, Hong Kong Street S- PR 22 breaker consists of the following main components: 1. Separable contacts coupled off. It consists of a movable contact and the fixed contact form. 2. Contacts driven gear. 3. Extinguishing equipment. 4. Device consists of a metal tube or the composition of the dielectric cylinder, which is mounted in contact coupling and extinguishing equipment and gear separable. It is mechanically to the movable contact of the circuit breaker to separate the fixed contacts when breaking the circuit breaker used. While closing the mechanical movement with the opposite movable contact with the fixed contact closure. During the operation of the on and breaking the load circuit, an electrical arc between the fixed and moving contacts. Arc is much more serious than the breaking process produces the closing process. When breaking the current is large, especially when short-circuit breaking, the arc is large, very difficult to break the circuit in the process of breaking the circuit interrupter process between the contacts of the circuit breaker is the circuit breaker The most complex and difficult process. Especially when the arc is short-circuit current flowing, the energy released at this time is very impressive, as lokV less oil circuit breaker 20kA, the arc power up to one million kilowatts. Such high energy arc almost entirely into heat. Make and break arc Arc heat the surrounding medium, can make up the center of the arc column temperature 4000 ~ 50001c. Thermal free. Constitute a good arc conductive path. So when you want to extinguish the arc, that is, when the AC current natural zero crossing. Arc gap must be quickly expelled from the land of hot ionized gases, metals Yan steam, and quickly introduced insulating medium. To prevent reignition. These requirements make the structure on certain difficulties. Special cut is due to a short circuit is an accident condition. Must be removed as soon as possible, so as not to short-circuit current damage to other electrical equipment. In addition, during the short, slightly extended arc burning blazing time, you can make the contact surface of the circuit breaker by strict smoke damage. The hydrazine should minimize the arc burning time in order to keep intact the device and the circuit breaker contacts contact surfaces.