System for quenching arc arising from operation of rotary switch - which has at least one fan arranged in axial direction of switch and has fan rotor with two blades mounted on rotating shaft

摘要

Two or more fans (6) are provided in separate housings. One fan lies between adjacent switches. The fan housing is stationary and forked or divided.$ A rotatable plate (8) is provided on the outside of the fan housing opposite the switching contacts, which has at least one nozzle opening (9), which follows the lower arc end of the moving switch contacts (3, 3a) and is provided with at least one second nozzle opening (10), which is aligned in direction on the lower arc end of the fixed contact (1, 1a).$ ADVANTAGE - Efficiency of quenching system is improved with gas flow aligned at right angles to arc.