FIELD: physics.
SUBSTANCE: invention relates to the field of low voltage electric devices, namely to the automatic circuit breaker actuator. Fusion welding isolation mechanism for automatic circuit breaker actuator includes automatic disconnection unit (100), left side plate (101), right side plate (104), mechanical lock assembly (102), half-axle (103), lever (105) and main shaft (106), wherein automatic disconnection unit (100), mechanical interlocking unit (102) and lever (105) are arranged between left (101) and right (104) by side plates, and semi-axle (103) and main shaft (106) are configured to pass through left (101) and right (104) side plates and protrusions thereof, automatic disconnection assembly (100), mechanical interlocking unit (102), semi-axle (103), lever (105) and main shaft (106) are made with possibility of movement in a binder, lever (105) and main shaft (106) are equipped with insulating devices to prevent operation of control handle (230) on opening during fusion welding of movable contact (110); insulating devices include a limiting unit on a limiting element of the main shaft and an elongated part of a hook-like shape on a flexible part from sheet metal.
EFFECT: mechanism is configured to limit the actuator rotation in the opening direction to prevent its damage under forced action; after termination of external force action actuator automatically switches to closing position.
6 cl, 21 dwg
