Direct-current arc extinguishing chamber includes inner extinguishing appliance and permanent magnetic field blowing arc into appliance, for contactor voltages

摘要

An arc extinguishing chamber (1) contains inner extinguishing appliance and permanent magnetic field for blowing arc into extinguishing appliance, consisting by ceramic granulate. Preferably, cavities are formed between individual ceramic granules. Ceramic granulate may be located in retainer in extinguishing chamber and size of individual ceramic granules is minimum 6 mm.