A device for locking an assembly includes an actuator having a first shape and a second shape, and a locking element. When the actuator has its first shape it moves the locking element into a blocking position in order to block the assembly, and when the actuator has its second shape, it moves the locking element into a release position in order to release the assembly. A system for locking different assemblies is also provided.

A switch includes: a circuit breaker; a disconnector; a grounding switch; and a manipulator that drives the disconnector and the grounding switch. The manipulator includes: a motor; a plurality of drive pulleys installed on an output shaft of the motor; and a controller for controlling rotation of the motor. Each of the disconnector and the grounding switch includes a switching manipulator that performs a switching action according to rotation of a driven pulley. A wire for transmitting torque of the motor is stretched around each of the drive pulleys and corresponding one of the driven pulleys. Each drive pulley includes: a mover having a catch that engages with the output shaft; and a chuck having a mover and a driver, the catch being engaged with the output shaft in the engaged state. The controller exclusively brings one of the plurality of drive pulleys into the engaged state.

The present disclosure provides an electrical system and an electrical apparatus including a flexible interlock mechanism. An electrical system to operate an electrical device in an enclosure includes an interlock mechanism, where the interlock mechanism includes an interlock slider for selectively engaging the enclosure with a busway structure; an actuating system on a door of the enclosure, where the actuating system includes a cam assembly that is configured to control the interlock mechanism; and a flexible mechanical interlock assembly that connects the cam assembly to the interlock mechanism, and where the flexible mechanical interlock assembly includes a push pull cable having a first end and a second end, where the first end of the push pull cable is connected to the cam assembly through a first connecting element, and where the second end of the push pull cable is connected to the interlock mechanism through a second connecting element.