How to Bow Fire Occurred in Circuit Breaker? At the time of termination or a circuit linking the power systems (circuit breaker) will occur arc, it happens because at the time of circuit breaker contacts are separated, the potential difference between the contacts will cause the electric field between the contact , as shown in the picture below.
The current that previously flowed to the contact will heat up the contacts and produce thermic emission at the contact surface. While the electric field of high field emissions led to contact the cathode (K). Both of these emissions are produced free electrons are very much and move toward the anode contact (A). These electrons hit the media a neutral molecule of positive isolation of the region, these collisions will cause the ionization process. Thus, the number of free electrons to the anode will be growing and emerging results of ionization of positive ions moving toward the cathode, transfer of free electrons to the anode current rise and heat the anode contact.
Positive ions arriving at the cathode contact will cause two different effects. If contact is made of high melting point materials, such as tungsten or carbon, then the positive ions will be cause heating at the cathode. As a result, emissions increased thermic. If contact is made from low melting point material, eg copper, positive ions will cause high field emission. The results of this thermic emissions and high field emissions will perpetuate the ionization process, so that the charge transfer between the contacts continued and is called the arc.
