Disclosed herein is a vacuum circuit breaker. In some embodiments, a vacuum circuit breaker includes a cradle having a rail which forms a travel route; a main body being movably mounted to the cradle and configured to be in a test position or in an operation position; a wheel traveling along the travel route and configured to move the main body to the test position or the operation position; an interlock plate provided in the main body so as to move together with the main body; and a ground interlock device restraining the movement of the main body by restraining the movement of the interlock plate when grounded.

A handle for a compartment of a low, medium or high voltage switchgear includes: a body part; a hand grasping part; and a lock. The handle is movable from a closed position to an open position. When the handle is in the closed position, the handle is not useable to open a door of a compartment of the switchgear. When the handle is in the open position, the handle is useable to open the door of the compartment of the switchgear. In the open position, the hand grasping part is positioned so as to be graspable by a human user. In the closed position, a transition of an active element in the compartment of the switchgear from a quiescent state to an active or potentially active state activates the lock. Activation of the lock stops the handle from moving from the closed position to the open position.

An interlock system for a low, medium or high voltage switchgear includes: a compartment; a door; a door handle; and a circuit breaker. The door permits access to an inside of the compartment. The door handle opens and closes the door. The circuit breaker is located in the compartment. The door handle is movable from a closed position to an open position. When the door handle is in the closed position, the door does not to open, and when the door handle is in the open position, the door opens. A movement of the door handle from the closed position to the open position places the circuit breaker in a locked configuration. In the

A circuit breaker installation including a frame assembly and a circuit breaker assembly is provided. The frame assembly includes a conductor assembly and the frame assembly defines an enclosed space. The frame assembly conductor assembly includes a primary contact assembly and a movable secondary contact assembly. The circuit breaker assembly is movably disposed in the frame assembly enclosed space. The contact assemblies are configurable electrical components. The configurable electrical components move between a connect configuration, a test configuration, and, a disconnect configuration.

A modular monitoring-and-control drawer (138) for an electrical connection enclosure is configured to be connected to an electricity source and to an electrical load. The drawer comprises functional elements dimensioned so as to be adapted to the electrical power delivered to the electrical load. The drawer comprises a base (328), the functional elements being attached to the base, the height of the base, measured along an axis (Z) perpendicular to the base, being constant. The drawer comprises a frontal part (300) and a cover (330). The heights of the frontal part and of the cover, measured along an axis perpendicular to the base, are adapted to the dimensions of the functional elements. The monitoring-and-control drawer is configured to operate in a first orientation in which its base is located at the bottom of the drawer and its cover is located at the top, and in a second orientation in which its base is located at the top and its cover is located at the bottom.

A monitoring/control plug-in unit (138) for a connection electrical enclosure comprises functional elements and allow the connection and possibly the operation and/or the surveillance of an electrical load. The monitoring/control plug-in unit able to move within the connection electrical enclosure between an operation position and a test position. The plug-in unit comprises a locking system (820), which comprises an electromagnetic lock. A control circuit board of the drawer control the functional elements and the electromagnetic lock. The locking system of the plug-in unit is configured to allow the monitoring/control plug-in unit to be locked in the test position or in the operation position independently of the functional elements contained in the plug-in unit, and prior validation of the correct operation of the plug-in unit and/or of the electrical load is needed for unlocking the plug-in unit, this validation being performed by the control circuit board and allowing the electromagnetic lock to be unlocked.

A door interlock device for a power transformer room in a vacuum circuit breaker includes a cam disposed on a shaft of a ground switch, a supporter disposed on a side plate of a power transformer room, a shaft disposed at the supporter to be slidable and having one end contacting the cam to be upward and downward movable, a spring disposed within the supporter to provide an upward elastic force to the shaft, and an interlock plate disposed at one side of the power transformer room door and configured to be in contact with the shaft.

A door interlock device for a power transformer room in a vacuum circuit breaker includes a cam disposed on a shaft of a ground switch, a supporter disposed on a side plate of a power transformer room, a shaft disposed at the supporter to be slidable and having one end contacting the cam to be upward and downward movable, a spring disposed within the supporter to provide an upward elastic force to the shaft, and an interlock plate disposed at one side of the power transformer room door and configured to be in contact with the shaft.

The present invention relates to an interlock device of a withdrawable arc eliminator, and more particularly, to an interlock device of a withdrawable arc eliminator capable of preventing insertion or withdrawal of an arc eliminator applied to an electrical panel, in a closed state of the arc eliminator.

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.