FIELD: electricity.
SUBSTANCE: invention is attributed to air circuit breaker switching mechanism. The invention makes possible to create air circuit breaker of minimum overall size by means of making switching mechanism relatively small in width. Air circuit breaker switching mechanism comprises two side plates, main drive shaft, main drive shaft arm, first tie rod, spring switching on device, loading cam, loading cam spindle, third tie rod, actuating arm, spring rest pin and end part held by means of spring rest pin, and elastic displacement spring of the third tie rod containing end part held by spring rest pin, and working part providing resilient force for the third tie rod to rotate in one direction. Elastic displacement spring of the third tie rod directly provides resilient force for the third tie rod in order to minimise distance between actuating arms of the pair and hence to minimise switching mechanism in its width. Elastic displacement spring of the third tie rod is made as torsion spring. Torsion spring may contain two end parts held by spring rest pin.
EFFECT: creation of air circuit breaker of minimum overall size by means of making switching mechanism relatively small in width.
4 cl, 13 dwg
