An interlocking system for a circuit breaker assembly including a circuit breaker having a plurality of contacts includes a racking screw coupled to the contacts that changes a position of the circuit breaker when engaged by a tool. The interlocking system also includes a front panel defining an opening through which the racking screw is accessible, an access door coupled to the front panel and configured to selectively cover the opening, and an access door stopper coupled to the front panel. The interlocking system also includes a trip assembly coupled to the access door stopper. Each of the access door, the access door stopper, and the trip assembly are moveable between a first position and a second position such that moving to the first position triggers delivery of a trip signal to the circuit breakers to open the plurality of contacts, and wherein, in the second position, the access door is fully open to enable access to the racking screw through the front panel.

A switchgear interlock system includes a circuit breaker with clusters of connector fingers separated from each other by respective cluster shields. In a connected position, the connector fingers engage respective bus connectors of bus bars for electrical contact. When the circuit breaker is disconnected from the bus bars, independently movable shutters cover access to the bus connectors to prevent inadvertent contact with the bus connectors. Each shutter includes a pedestal with an attached movable mount and movable curtain. As the circuit breaker is moved into the connected position, the mount slides along the pedestal towards the bus connector causing the curtain to open and allow the connector fingers to engage the bus connectors. As the circuit breaker is being disconnected, a return spring causes the mount to slide along the pedestal away from the bus connectors causing the curtain to close and prevent access to the bus connectors.

A switchgear interlock system includes a circuit breaker with clusters of connector fingers separated from each other by respective cluster shields. In a connected position, the connector fingers engage respective bus connectors of bus bars for electrical contact. When the circuit breaker is disconnected from the bus bars, independently movable shutters cover access to the bus connectors to prevent inadvertent contact with the bus connectors. Each shutter includes a pedestal with an attached movable mount and movable curtain. As the circuit breaker is moved into the connected position, the mount slides along the pedestal towards the bus connector causing the curtain to open and allow the connector fingers to engage the bus connectors. As the circuit breaker is being disconnected, a return spring causes the mount to slide along the pedestal away from the bus connectors causing the curtain to close and prevent access to the bus connectors.

A drill motor racking apparatus for remote operation of a circuit breaker is disclosed. The drill motor racking apparatus comprises: a racking adapter, wherein the racking adapter is adapted to be engaged by and secured in a racking mechanism of a circuit breaker; a gearbox having an input and an output; a flexible shaft cable having a first end and a second end, wherein the racking adapter is connected to the first end of the flexible shaft cable and wherein the gearbox is incorporated between the flexible shaft cable and the racking adapter to provide a torque multiplication required to rack the circuit breaker; and a drill adapter adapted to be engaged by and secured in a drill, wherein the drill adapter is attached to the second end of the flexible shaft cable. A method of using the drill motor racking apparatus is also disclosed.

A drill motor racking apparatus for remote operation of a circuit breaker is disclosed. The drill motor racking apparatus comprises: a racking adapter, wherein the racking adapter is adapted to be engaged by and secured in a racking mechanism of a circuit breaker; a gearbox having an input and an output; a flexible shaft cable having a first end and a second end, wherein the racking adapter is connected to the first end of the flexible shaft cable and wherein the gearbox is incorporated between the flexible shaft cable and the racking adapter to provide a torque multiplication required to rack the circuit breaker; and a drill adapter adapted to be engaged by and secured in a drill, wherein the drill adapter is attached to the second end of the flexible shaft cable. A method of using the drill motor racking apparatus is also disclosed.

A circuit breaker with an integrated motorized racking mechanism, automatically provides electrical power to the racking motor when the breaker is inserted into a breaker compartment. The racking motor remains powered when the breaker is in either a disconnected position, a testing position, or a fully connected position. A racking power plug mounted within the circuit breaker conducts electrical power to the racking motor by automatically connecting to a stationary racking power receptacle mounted in the breaker compartment, and remains connected as the circuit breaker moves through the breaker compartment during the racking operation. A control power plug is mounted in the circuit breaker to connect to a stationary control power receptacle mounted in the breaker compartment and to conduct control power to control circuits in the circuit breaker after the racking motor has completed racking the circuit breaker into the connected position in the breaker compartment.

A circuit breaker with an integrated motorized racking mechanism, automatically provides electrical power to the racking motor when the breaker is inserted into a breaker compartment. The racking motor remains powered when the breaker is in either a disconnected position, a testing position, or a fully connected position. A racking power plug mounted within the circuit breaker conducts electrical power to the racking motor by automatically connecting to a stationary racking power receptacle mounted in the breaker compartment, and remains connected as the circuit breaker moves through the breaker compartment during the racking operation. A control power plug is mounted in the circuit breaker to connect to a stationary control power receptacle mounted in the breaker compartment and to conduct control power to control circuits in the circuit breaker after the racking motor has completed racking the circuit breaker into the connected position in the breaker compartment.

The present disclosure relates to a distributing board having a position lock device and, more specifically, having a position lock device which can hold or release, at a specific position, an electric power device unit. The distributing board having a position lock device, according to one embodiment of the present disclosure, comprises an external case and an electric power device unit drawn into and out of the external case, and further comprises: a position setting bracket which is fixed to the external case and has convex-concave parts for setting the position of the electric power device unit; and a lock device which moves with the electric power device unit by being coupled to a portion of the electric power device unit, and which restricts or allows movement of the electric power device unit by being hooked into or released from the positions of the position setting bracket.

Embodiments of the present disclosure relate to a switch device, comprising: a first three-position switch; a second three-position switch disposed below the first three-position switch; a circuit breaker disposed between the first three-position switch and the second three-position switch. A first interlock unit is disposed above the circuit breaker and connected to the circuit breaker and the first three-position switch, and configured to block a manual operation of the first three-position switch in a closed state of the circuit breaker, and configured to block a manual closing operation of the circuit breaker while the first three-position switch is manually operated in an open state of the circuit breaker. A second interlock unit is disposed below the circuit breaker and connected to the circuit breaker and the second three-position switch, and is configured to block a manual operation of the second three-position switch in the closed state of the circuit breaker, and configured to block a manual closing operation of the circuit breaker while the second three-position switch is manually operated in the open state of the circuit breaker.

Embodiments of the present disclosure relate to a switch device, comprising: a first three-position switch; a second three-position switch disposed below the first three-position switch; a circuit breaker disposed between the first three-position switch and the second three-position switch. A first interlock unit is disposed above the circuit breaker and connected to the circuit breaker and the first three-position switch, and configured to block a manual operation of the first three-position switch in a closed state of the circuit breaker, and configured to block a manual closing operation of the circuit breaker while the first three-position switch is manually operated in an open state of the circuit breaker. A second interlock unit is disposed below the circuit breaker and connected to the circuit breaker and the second three-position switch, and is configured to block a manual operation of the second three-position switch in the closed state of the circuit breaker, and configured to block a manual closing operation of the circuit breaker while the second three-position switch is manually operated in the open state of the circuit breaker.