Influence of the dissociation unit on pressure and temperature distribution in arc chamber of ACB during the breaking process

To void breakdown between busbars, the dissociation unit is applied in arc chamber of an air circuit breaker (ACB) to cool down hot gas exhausted from vent interrupting process. Cooling efficiency and flow resistance have important roles, which can greatly affect safety low voltage switcher performance chamber. The most common structure style a multilayer metal wire mesh, it has complex microstructure. Then, unreasonable directly simulate due huge cost calculation. In this study, porous medium model introduced combination two different materials simplify simulation unit. Based on simplified model, ACB with analyzed. cooling effect are evaluated breaking By comparing experimental simulated pressures chamber, approach verified.