An electrical disconnect switch including an over-rotation protective feature to protect the load switch from damage is disclosed. The electrical disconnect switch may include an enclosure, a load switch, and a handle assembly coupled to the load switch. The disconnect switch may include a detent between the handle assembly and the load switch so that during excessive rotation or torqueing the handle assembly is permitted to decouple or break-away from the load switch to prevent excessive stress from being transferred to the load switch and thus prevent any damage to the load switch.

An automatic actuator assembly including a passive actuator assembly and a detection assembly is operatively coupled to an arc reduction assembly. The passive actuator assembly is coupled to the arc reduction assembly and structured to move the arc reduction assembly between a disengaged, first configuration and an engaged, second configuration.

A safety switch includes a housing including first and second compartments that are separated by a barrier, a switch mechanism in the first compartment, one or more fuse holders in the second compartment, a first door connected to the housing and covering the first compartment, a second door connected to the housing, a handle connected to the switch mechanism, and a locking mechanism operatively connected to the handle. The handle is movable between an off position and an on position. The locking mechanism configured such that: the second door is locked in a closed position when the handle is in the on position; the second door is movable from the closed position to an open position to expose the second compartment when the handle is in the off position; and the handle is locked in the off position when the second door is in the open position.

A system and method for connecting supply power to motor control components includes use of a motor control center subunit with moveable supply power contacts. After a motor control center subunit is secured into a motor control center compartment, the supply power contacts may be advanced to engage supply power buses. For disconnection, the supply power contacts may be retracted and isolated from the buses before physical removal of the subunit.

An automatic actuator assembly including a passive actuator assembly and a detection assembly is operatively coupled to an arc reduction assembly. The passive actuator assembly is coupled to the arc reduction assembly and structured to move the arc reduction assembly between a disengaged, first configuration and an engaged, second configuration.

An in-wall electrical control unit with openable switch cover has a switch cover attached to a housing of the electrical control unit adjacent to a user interface of the electrical control unit such that the switch cover can be maneuvered between an opened position exposing the user interface for programming and a closed position wherein the switch cover is positioned over the user interface. An interface actuation knob on an inner surface of the switch cover aligned with a specific control of the user interface allows the user to operate the specific control while the switch cover is in the closed position.

A system and method for connecting supply power to motor control components includes use of a motor control center subunit with moveable supply power contacts. After a motor control center subunit is secured into a motor control center compartment, the supply power contacts may be advanced to engage supply power buses. For disconnection, the supply power contacts may be retracted and isolated from the buses before physical removal of the subunit.

An automatic actuator assembly including a passive actuator assembly and a detection assembly is operatively coupled to an arc reduction assembly. The passive actuator assembly is coupled to the arc reduction assembly and structured to move the arc reduction assembly between a disengaged, first configuration and an engaged, second configuration.

Embodiments provide a terminal, and the terminal includes a body, a cover body covering the body, a circuit board mounted in the body, a central processing unit welded on the circuit board, a control part mounted on the cover body, and a protection switch welded on the circuit board. A hard disk slot for accommodating a hard disk is disposed in the body. The cover body is detachably mounted on the body, and is configured to seal the hard disk in the hard disk slot. The cover body is opened to drive the control part to open the protection switch. An electrical signal variation is generated due to opening of the protection switch. After detecting the electrical signal variation, the central processing unit instructs the hard disk to perform data protection and powers off the hard disk.

A door locking device of a distribution board of an air circuit breaker, including a transmission shaft transmitting power for drawing in and out a circuit breaker body, a shaft link rotatably coupled to one end of the transmission shaft, a link rod having one end rotatably coupled to a portion of the shaft link, a cam plate rotatably coupled to the other end of the link rod and pushing or pulling the circuit breaker boy, and a constraint plate installed in a distribution board door, further includes a pressing part protruding from a portion of the link road, and a hook plate rotatably coupled to a side of the cradle and having one end in contact with the pressing part to receive rotational force and the other end restricting or releasing the constraint plate, wherein the hook plate releases the constraint plate in a disconnection position.