Abstract: A switching apparatus including one or more electric poles. For each electric pole, the switching apparatus includes a first pole terminal, a second pole terminal, a ground terminal, and a plurality of fixed contacts spaced apart one from another. For each electric pole, the switching apparatus further includes a movable contact and a vacuum interrupter. The movable contact is reversibly movable about a corresponding rotation axis. The vacuum interrupter includes a movable arc contact reversibly movable along a corresponding translation axis. For each electric pole, the switching apparatus further includes a motion transmission mechanism operatively coupled to a contact shaft solidly coupled to the movable arc contact. The motion transmission mechanism is actuatable by the movable contact to cause a movement of said movable arc contact along said translation axis, when said movable contact moves about said rotation axis.

Abstract: A method for assembling a switching apparatus for medium voltage electric systems is provided. The method includes, for each electric pole of the switching apparatus, providing a mounting assembly. The mounting assembly includes a support structure, a vacuum interrupter, a motion transmission mechanism, and an auxiliary contact. The method further includes providing a first semi-finished structure of the switching apparatus, where the first semi-finished structure includes, for each electric pole of the switching apparatus, a first pole terminal and a first fixed contact electrically connected to the first pole terminal. The method further includes, for each electric pole of the switching apparatus, installing the mounting assembly on the first semi-finished structure.

Abstract: A monitoring system includes a frame, a fixed contact, a moveable contact, a drive mechanism, and a linkage mechanism, wherein the fixed contact is fixed in position with respect to the frame, and wherein the linkage mechanism is coupled to the drive and the moveable contact, and wherein activation of the drive is configured to move the linkage mechanism such that the moveable contact is moved towards or away from the fixed contact, and wherein the monitoring system comprises a sensor system having a position sensor and a processor, the position sensor configured to be positioned with respect to the frame and the linkage mechanism such that lateral movement of a part of the linkage mechanism generates at least one displacement signal; and the processor configured to convert the at least one displacement signal to a displacement movement of the moveable contact toward or away from the fixed contact.

Abstract: A heat sink for a high voltage switchgear includes: a body. The body is centered around a central axis that extends in an axial direction from a first outer surface of the body to a second outer surface of the body. At least one third outer surface of the body extends from the first outer surface to the second outer surface. At least one air channel extends through the body from the first outer surface to the second outer surface. The at least one air channel is surrounded by the at least one third outer surface.

Abstract: A heat sink for a high voltage switchgear includes: a body. The body is centered around a central axis that extends in an axial direction from a first outer surface of the body to a second outer surface of the body. At least one third outer surface of the body extends from the first outer surface to the second outer surface. At least one air channel extends through the body from the first outer surface to the second outer surface. The at least one air channel is surrounded by the at least one third outer surface.

Abstract: A heat sink for a high voltage switchgear includes: a body. The body is centered around a central axis that extends in an axial direction from a first outer surface of the body to a second outer surface of the body. At least one third outer surface of the body extends from the first outer surface to the second outer surface. At least one air channel extends through the body from the first outer surface to the second outer surface. The at least one air channel is surrounded by the at least one third outer surface.

Abstract: An electrical connection assembly in an electrical switchgear comprising a circuit breaker movable between a disconnected, withdrawn, position and a connected, service, position, wherein said circuit breaker comprises, for each phase, a first connection terminal couplable to/uncouplable from a corresponding second, stationary, connection terminal of said switchgear, characterized in that said electrical connection assembly comprises a first contact element electrically and mechanically connected to said first connection terminal of said circuit breaker, a second contact element electrically and mechanically connected to said second, stationary, connection terminal of said switchgear, and a third, intermediate, contact element that is electrically and mechanically connected with one of said first and second contact elements and that is electrically and mechanically couplable to/uncouplable from the other of said first and second contact elements, and further characterized in that said first and second contact

Abstract: A switching device including a switching unit with one or more electric poles having an insulating casing. The switching device is reversibly movable between an insertion position, at which said switching unit is electrically connected with an electric line, and a withdrawal position, at which said switching unit is electrically disconnected from said electric line. One or more actuating elements may be operatively coupleable with an actuating mechanism of a shutter device to operate one or more shutters of the shutter device during the movement of the switching device. The actuating elements may be fixed to the switching unit. At least one of the actuating elements includes a first mechanical connection with the insulating casing of at least one of the electric poles, and the insulating casing of at least one of the electric poles includes a second mechanical connection with at least one of the actuating elements.

Abstract: A switching device including a switching unit with one or more electric poles having an insulating casing. The switching device is reversibly movable between an insertion position, at which said switching unit is electrically connected with an electric line, and a withdrawal position, at which said switching unit is electrically disconnected from said electric line. One or more actuating elements may be operatively coupleable with an actuating mechanism of a shutter device to operate one or more shutters of the shutter device during the movement of the switching device. The actuating elements may be fixed to the switching unit. At least one of the actuating elements includes a first mechanical connection with the insulating casing of at least one of the electric poles, and the insulating casing of at least one of the electric poles includes a second mechanical connection with at least one of the actuating elements.

Abstract: A contact-finger-element includes a first contact-portion and a second-contact-portion which are suitable for engaging with a first conducting terminal and with a second conducting-terminal respectively; the first-contact-portion and the second-contact-portion have respective cross-sections including concave “V”-shaped profiles, each concave “V”-shaped profile having two straight portions mutually tilted by a respective included angle which is adapted so as to enable the first contact-portion and the second-contact-portion to tangentially contact with a curved surface of the first conducting terminal and of the second conducting terminal respectively at intermediate zones of the respective straight portions. There is also disclosed a tulip-contact assembly comprising a plurality of such contact-finger-elements.

Abstract: A contact-finger-element includes a first contact-portion and a second-contact-portion which are suitable for engaging with a first conducting terminal and with a second conducting-terminal respectively; the first-contact-portion and the second-contact-portion have respective cross-sections including concave “V”-shaped profiles, each concave “V”-shaped profile having two straight portions mutually tilted by a respective included angle which is adapted so as to enable the first contact-portion and the second-contact-portion to tangentially contact with a curved surface of the first conducting terminal and of the second conducting terminal respectively at intermediate zones of the respective straight portions. There is also disclosed a tulip-contact assembly comprising a plurality of such contact-finger-elements.

Abstract: A Medium Voltage circuit breaker which comprises a pole assembly having, for each phase, an interruption chamber housing a first fixed contact and a second movable contact reciprocally couplable/uncouplable between an open and close position; the Medium Voltage circuit breaker further comprises an actuator to actuate the opening and closing operation of said circuit breaker and an insulating base frame supporting said pole assembly and said actuator.

Abstract: A Medium Voltage circuit breaker which comprises an insulating base frame supporting: a pole assembly having, for each phase, an interruption unit housing a fixed contact and a movable contact reciprocally couplable/uncouplable between an open and a closed position; an actuator to actuate the opening and closing operation of said circuit breaker; and, a control and diagnostic unit comprising a control box having a casing housing a plurality of accessory devices of said circuit breaker.

Abstract: A Medium Voltage circuit breaker which comprises a pole assembly having, for each phase, a first fixed contact and a second movable contact reciprocally couplable/uncouplable between an open and close position. The circuit breaker further comprises an actuator to actuate the opening and closing operation of said circuit breaker, and a kinematic chain operatively connecting said actuator to said movable contact. The kinematic chain comprises a sliding element operatively connected to said actuator, said sliding element having a first sliding surface operatively coupled to said movable contact and being movable between a first, open, position and a second, closed, position.

Abstract: The invention relates to a power distribution switchgear circuit breaker applicable especially to medium or high voltage distribution board switchgears. The power distribution switchgear circuit breaker comprises at least one breaking element in the form of vacuum chamber or SF6 pole, which is provided with electric terminals, to which there are non-permanently connected the ends of contact arms, made in the form of a metal tube. The circuit breaker according to the invention is characterized in that the metal tube of the contact arms has all cross-sections perpendicular to the axis of the tube without any discontinuities along the whole length of the tube and it is located in an insulating casing which is provided with cooling elements which are located on the outer surface of the casing and which form an integral part with the casing.

Abstract: A Medium Voltage circuit breaker which comprises an insulating base frame supporting: a pole assembly having, for each phase, an interruption unit housing a fixed contact and a movable contact reciprocally couplable/uncouplable between an open and a closed position; an actuator to actuate the opening and closing operation of said circuit breaker; and, a control and diagnostic unit comprising a control box having a casing housing a plurality of accessory devices of said circuit breaker.

Abstract: A Medium Voltage circuit breaker which comprises a pole assembly having, for each phase, an interruption chamber housing a first fixed contact and a second movable contact reciprocally couplable/uncouplable between an open and close position; the Medium Voltage circuit breaker further comprises an actuator to actuate the opening and closing operation of said circuit breaker and an insulating base frame supporting said pole assembly and said actuator.

Abstract: A Medium Voltage circuit breaker which comprises a pole assembly having, for each phase, a first fixed contact and a second movable contact reciprocally couplable/uncouplable between an open and close position. The circuit breaker further comprises an actuator to actuate the opening and closing operation of said circuit breaker, and a kinematic chain operatively connecting said actuator to said movable contact. The kinematic chain comprises a sliding element operatively connected to said actuator, said sliding element having a first sliding surface operatively coupled to said movable contact and being movable between a first, open, position and a second, closed, position.