A vacuum interrupter has a toroidal portion at one or both ends that achieves higher dielectric levels and hence higher interruption levels.

A switching device for low-voltage or medium-voltage applications including: one or more electric poles; for each electric pole, at least a fixed contact and at least a movable contact, each movable contact being reversibly movable between a coupled position, at which the movable contact is coupled with a corresponding fixed contact, and an uncoupled position, at which the movable contact is separated from the fixed contact, wherein a separation gap is present between the movable contact and the fixed contact, when the movable contact is in the uncoupled position. The switching device includes, for each electric pole, at least an arc-diverting element made of electrically insulating material.

A switching device for low-voltage or medium-voltage applications including: one or more electric poles; for each electric pole, at least a fixed contact and at least a movable contact, each movable contact being reversibly movable between a coupled position, at which the movable contact is coupled with a corresponding fixed contact, and an uncoupled position, at which the movable contact is separated from the fixed contact, wherein a separation gap is present between the movable contact and the fixed contact, when the movable contact is in the uncoupled position. The switching device includes, for each electric pole, at least an arc-diverting element made of electrically insulating material.

A gas circuit breaker includes a sealed tank, a movable side main electrode and a fixed side main electrode in the sealed tank facing each other, a movable side arc electrode and a fixed side arc electrode in the sealed tank facing each other, a cylinder at a circumference of the movable side arc electrode, a piston in the cylinder in a slidable manner and forming a puffer chamber together with the cylinder, an insulation nozzle in the sealed tank, an exhaust pipe at a circumference of the fixed side arc electrode and exhausting heat gas, which is sprayed on an arc generated in the insulation nozzle in the opening electrode operation, to an outside, and a closing plate in the exhaust pipe. One or more vent holes leading the heat gas from an inside of the exhaust pipe to the outside is on a surface of the closing plate.

A gas circuit breaker includes a sealed tank, a movable side main electrode and a fixed side main electrode in the sealed tank facing each other, a movable side arc electrode and a fixed side arc electrode in the sealed tank facing each other, a cylinder at a circumference of the movable side arc electrode, a piston in the cylinder in a slidable manner and forming a puffer chamber together with the cylinder, an insulation nozzle in the sealed tank, an exhaust pipe at a circumference of the fixed side arc electrode and exhausting heat gas, which is sprayed on an arc generated in the insulation nozzle in the opening electrode operation, to an outside, and a closing plate in the exhaust pipe. One or more vent holes leading the heat gas from an inside of the exhaust pipe to the outside is on a surface of the closing plate.

Stackable electric contact block including a casing that defines its volume, the casing having upper and lower faces for connecting the block to another component, the casing accommodating a screw for fixing the block to another component, and a press rod capable of moving from a rest position to an activation position for transferring a translation force to a component attached to the lower face of the casing, the press rod including an activation head in the form of a wedge capable of engaging with a push-button or a rotary knob, the casing including a cavity for guiding the press rod between its rest and activation positions, in which cavity the press rod is accommodated. A device for guiding the press rod into the guide cavity includes a guide tab accommodated in a matching guide slot passing through the activation head.

Stackable electric contact block including a casing that defines its volume, the casing having upper and lower faces for connecting the block to another component, the casing accommodating a screw for fixing the block to another component, and a press rod capable of moving from a rest position to an activation position for transferring a translation force to a component attached to the lower face of the casing, the press rod including an activation head in the form of a wedge capable of engaging with a push-button or a rotary knob, the casing including a cavity for guiding the press rod between its rest and activation positions, in which cavity the press rod is accommodated. A device for guiding the press rod into the guide cavity includes a guide tab accommodated in a matching guide slot passing through the activation head.

A mechanical interlock assembly for a disconnector and an earthing switch. The mechanical interlock assembly comprises: a main interlock disc configured to actuate a movable contact of a disconnector, and at least one earthing switch interlock disc configured to actuate respective movable contact of at least one earthing switch respectively. The main interlock disc includes at least one first groove, and each of the at least one earthing switch interlock discs includes a third groove, and it is provided with a movable interlock pin between the main interlock disc and each earthing switch interlock disc respectively. The interlock assembly can interlock the disconnector and the at least one earthing switch, and has the advantages of a simple structure, low cost and flexibility for different arrangements. A further mechanical interlock assembly is also provided to interlock another disconnector and one of the above at least one earthing switch.

A breaker includes a stationary contact, a movable contact, an operation device including a link portion liked to the movable contact and including an output lever rotatably supported, the operation device operating rotation of the output lever in accordance with a first control signal for a command for pulling out the movable contact and a second control signal for a command for inserting the movable contact, and an auxiliary contact to switch between turn-on and turn-off of an input of the first control signal and the second control signal to the operation device in conjunction with operation of the output lever, the auxiliary contact being able to be used in a circuit configuration to monitor a state of the operation device. The output lever rotates so as to operate a first link portion on a side toward a first direction with respect to a rotational center of the output lever.

A breaker includes a stationary contact, a movable contact, an operation device including a link portion liked to the movable contact and including an output lever rotatably supported, the operation device operating rotation of the output lever in accordance with a first control signal for a command for pulling out the movable contact and a second control signal for a command for inserting the movable contact, and an auxiliary contact to switch between turn-on and turn-off of an input of the first control signal and the second control signal to the operation device in conjunction with operation of the output lever, the auxiliary contact being able to be used in a circuit configuration to monitor a state of the operation device. The output lever rotates so as to operate a first link portion on a side toward a first direction with respect to a rotational center of the output lever.