Circuit breaker, arcing chamber housing for a circuit breaker and housing module for an arcing chamber housing

An arcing chamber housing for a circuit breaker comprising:

• a first housing module, the first housing module being essentially L-shaped and having a first housing limb;
• and
• a second housing module, the second housing module being essentially L-shaped and having a second housing limb and an inner edge surface, the inner edge surface facing the first housing module, the first and second housing modules for housing a rotary double-break interrupter of the circuit breaker, the rotary double-break interrupter including a first and a second stationary contact member connected via rail-shaped conductors to respective first and second connecting terminals, the rotary double-break interrupter including a two-arm rotatable contact member rotatable about a shaft for connecting in a closed position the first and second stationary contact members, the first and second stationary contact members in response to an overload situation for swivelling the rotatable contact member into an open position;
• the first and second housing limbs each forming an arc extinction chamber for the rotary double-break interrupter in an area of the first and second stationary contact members.