FIELD: electric engineering.
SUBSTANCE: invention is related to roll-out air circuit breaker, which is able to provide for automatic unloading of closing spring in rolled out condition in roll-out air circuit breaker, and automatic unloading device for closing spring in air circuit breaker. Automatic unloading device for closing spring comprises device for prevention of cam axis rotation installed on cam axis, which provides for loading or unloading of closing spring and arranged with the possibility of cam axis rotation limiting under action of elastic restorative force of closing spring, and device for splitting of device for prevention of cam axis rotation, connected to device for prevention of cam axis rotation and arranged with the possibility of cam axis rotation under action of elastic restorative force of closing spring in compliance with positions, in which main body of air circuit breaker is rolled out of seat.
EFFECT: increased reliability of operator protection against risks that might occur due to accidental discharging of device for power accumulation.
11 cl, 14 dwg
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