A cradle intended to be incorporated in a high-voltage electrical switchgear cubicle, including a mobile trolley bearing a switch apparatus provided with mobile contacts, a mechanism for operating the mobile contacts via operating springs and at least one coil for actuating the operating springs, a motorized protection shutter intended to prevent access to conductive busbars of the switchgear cubicle, and motorized device for driving the mobile trolley intended to be able to connect the switch apparatus to the conductive busbars. A first automation controller is embedded on the mobile trolley to control the operating mechanism and the actuating coil, and a second automation controller is embedded in the cradle to control the protection shutter and the device for driving the mobile trolley.

A cradle intended to be incorporated in a high-voltage electrical switchgear cubicle, including a mobile trolley bearing a switch apparatus provided with mobile contacts, a mechanism for operating the mobile contacts via operating springs and at least one coil for actuating the operating springs, a motorized protection shutter intended to prevent access to conductive busbars of the switchgear cubicle, and motorized device for driving the mobile trolley intended to be able to connect the switch apparatus to the conductive busbars. A first automation controller is embedded on the mobile trolley to control the operating mechanism and the actuating coil, and a second automation controller is embedded in the cradle to control the protection shutter and the device for driving the mobile trolley.

Provided is a handcart circuit breaker and a contact device thereof including a contact arm and a moving contact. Inner walls of a cylindrical contact finger base in axial direction respectively have a contact finger groove with a spring contact finger for plugging the contact arm and a fixed contact; a rear of the contact finger base sleeves with a front of the contact arm having a positioning groove larger than a fitting end of the support pin, the contact finger base has support pins extending into the contact finger base; a diameter of a circle corresponding to the fitting end of each support pin is larger than a diameter of a circle corresponding to a bottom of each positioning groove; the contact finger base connects with the contact arm and an elastic support structure is arranged between the contact arm and the inner wall of the contact finger base.

Provided is a handcart circuit breaker and a contact device thereof including a contact arm and a moving contact. Inner walls of a cylindrical contact finger base in axial direction respectively have a contact finger groove with a spring contact finger for plugging the contact arm and a fixed contact; a rear of the contact finger base sleeves with a front of the contact arm having a positioning groove larger than a fitting end of the support pin, the contact finger base has support pins extending into the contact finger base; a diameter of a circle corresponding to the fitting end of each support pin is larger than a diameter of a circle corresponding to a bottom of each positioning groove; the contact finger base connects with the contact arm and an elastic support structure is arranged between the contact arm and the inner wall of the contact finger base.

An interlock system includes a number of lock assemblies and a number of keys. Each key is associated with at least one lock assembly. The number of lock assemblies includes a number of actuator lock assemblies and a number of multi-purpose lock assemblies. The number of keys includes a number of actuator keys and a number of multi-purpose keys. At least one lock assembly is operatively coupled to a reliable indicator.

A high voltage electric switchboard in which manufacturing productivity is greatly improved and each functional part can be easily replaced and repaired is provided. In the high voltage electric switchboard, a plurality of functional parts including a bus bar part, a measurement and supervisory controller, a circuit breaker part, a wire part, and potential transformer part are independently modularized such that the functional parts do not have a shared surface with each other and at least two outer surfaces of an enclosure of each of the modularized functional parts are installed to be in contact with an outer surface of an enclosure of another functional part adjacent in a horizontal direction or a vertical direction.

A high voltage electric switchboard in which manufacturing productivity is greatly improved and each functional part can be easily replaced and repaired is provided. In the high voltage electric switchboard, a plurality of functional parts including a bus bar part, a measurement and supervisory controller, a circuit breaker part, a wire part, and potential transformer part are independently modularized such that the functional parts do not have a shared surface with each other and at least two outer surfaces of an enclosure of each of the modularized functional parts are installed to be in contact with an outer surface of an enclosure of another functional part adjacent in a horizontal direction or a vertical direction.

An interlock system includes a number of lock assemblies and a number of keys. Each key is associated with at least one lock assembly. The number of lock assemblies includes a number of actuator lock assemblies and a number of multi-purpose lock assemblies. The number of keys includes a number of actuator keys and a number of multi-purpose keys. At least one lock assembly is operatively coupled to a reliable indicator.

An interlock system includes a number of lock assemblies and a number of keys. Each key is associated with at least one lock assembly. The number of lock assemblies includes a number of actuator lock assemblies and a number of multi-purpose lock assemblies. The number of keys includes a number of actuator keys and a number of multi-purpose keys. At least one lock assembly is operatively coupled to a reliable indicator.

Cradle-assist assemblies attached to the breaker cradle housing and/or base or residing at least partially in the breaker cradle housing and/or base include at least one actuator configured to laterally translate the at least one right and the at least one left lock members from the extended lock position to the retracted unlocked position in response to input from a user. The at least one actuator and/or transverse member(s) can be held in a defined position so that the lock members of the cradle can be locked in the respective retracted or extended positions until the cradle assist (internal) lock is manually or automatically released.