A circuit breaker system has an SF6 tank having a wall, and an SF6 heating system. The SF6 heating system includes a heater disposed externally of the tank, and a radiator disposed on the wall inside the SF6 tank. The radiator is thermally coupled to the heater via the wall. The heating system is constructed to conduct heat from the heater through the wall to the radiator. The radiator is constructed to radiate the heat to the SF6 in the tank. A circuit breaker system has an SF6 tank having a wall, and a particle trap. The particle trap has a spar extending radially inward from the wall and a wing extending outward from each side of the spar. Each wing is spaced apart from the wall and forms a region having no electric field at the bottom of the tank adjacent the spar.

A high-voltage circuit breaker comprises a first main contact and a second main contact extending along a central longitudinal axis and being at least partially enclosed by an insulator, wherein the insulator has an inner surface facing the central longitudinal axis and being arranged at a first distance from the central longitudinal axis, and further comprises at least one particle trap for trapping particles generated during operation of the circuit breaker, wherein the particle trap has an inner surface facing the central longitudinal axis and being arranged at a second distance from the central longitudinal axis, the second distance being larger than the first distance.

A high-voltage circuit breaker comprises a first main contact and a second main contact extending along a central longitudinal axis and being at least partially enclosed by an insulator, wherein the insulator has an inner surface facing the central longitudinal axis and being arranged at a first distance from the central longitudinal axis, and further comprises at least one particle trap for trapping particles generated during operation of the circuit breaker, wherein the particle trap has an inner surface facing the central longitudinal axis and being arranged at a second distance from the central longitudinal axis, the second distance being larger than the first distance.

An electric switching device may include at least two conductor elements that can be placed at a distance from one another and contacted with each other using a moving mechanism, and a housing that defines a circuit breaker chamber, wherein the housing is made of an insulator, and at least partly surrounds the conductor elements. At least one face of the housing may have a resistive coating made of a matrix material filled with a filler, wherein the coating has a sheet resistance between 10.sup.8 and 10.sup.12 ohm at the operating field strength, and is conductingly connected to the conductor elements.

Method and apparatus for reducing the minimum clearance needed between an electrical conductor and ground in switchgear and similar electrical isolation equipment provide a bus-connector having an extended toroidal shape that is designed to allow the size of the switchgear cabinet to be reduced while complying with industry-standard performance requirements. The toroidal shaped bus-connector has mostly or only smooth and rounded surfaces so there are no hard or sharp edges or corners from which electrical discharge from/to ground or other conductors may occur. The shaped bus-connector also has an elongated body that produces an offset connection resembling a Z, which allows power buses and breaker terminals that do not vertically line up to connect.

A switching configuration includes a first switching contact set having a rated current contact piece and an arcing contact piece. The arcing contact piece and the rated current contact piece of the first switching contact set are movable relative to one another through a transmission mechanism. The arcing contact piece is supported by a support element on a contact carrier of the rated current contact piece. The transmission mechanism has a transmission mechanism chassis which is supported, particularly directly, on the contact carrier.

Modular switchgear and methods for manufacturing the same. The modular switchgear includes a vacuum interrupter assembly, a source conductor assembly, and a housing assembly. The vacuum interrupter assembly includes a bushing, a fitting, and a vacuum interrupter at least partially molded within the bushing and including a movable contact and a stationary contact. The source conductor assembly includes a bushing, a fitting, and a source conductor molded within the bushing. The housing assembly includes a housing defining a chamber and a drive shaft and conductor positioned within the chamber. The housing assembly also includes a first receptacle for receiving the fitting of the vacuum interrupter assembly and a second receptacle for receiving the fitting of the source conductor assembly. The vacuum interrupter assembly, the source conductor assembly, and the housing assembly are coupled without molding the assemblies within a common housing.

Exemplary embodiments are directed to an electrical component for a high-voltage installation. The electrical component in a coaxial arrangement, has an electrical conductor which extends along an axis and is connected to high-voltage potential and a rigid insulating body. The insulting body is fastened on the electrical conductor and surrounds the electrical conductor. A mounting flange is fastened on the insulating body, and is connected to ground potential. A dome-shaped control electrode is electrically connectively connected to the electrical conductor and is fastened to one end of the electrical conductor. During operation of the installation, the control electrode controls the electrical field between the electrical conductor and the mounting flange. The control electrode is connected non-detachably to the electrical conductor and has a dimensionally stable dome consisting of the solid polymer composition to provide a simple manufacturing process and increase the operational reliability of the component.

A surge suppression device comprising a voltage sensitive element, heat sensitive materials, terminals, a blocking element and a non-conductive barrier is disclosed. One of the terminals comprises an arm portion, a contact portion and an extension portion extended from the contact portion. The blocking element has a part engaging with the extension portion and another part contacting with the barrier and separating the barrier from the arm portion of the terminal. The device has higher structural stability and sensitivity and is only failed in the event that the voltage sensitive element is failed due to aging or grid fault.

Embodiments herein provide a disconnector (300) for an electrical apparatus (200), comprising a first contact (310) having a longitudinal center axis and a second contact (320). At least one of the first contact (310) and the second contact (320) is movable in a direction of the longitudinal center axis of the first contact (310), the first contact (310) being connected to the second contact (320) in a closed position and disconnected from the second contact (320) in an open position. The first contact (310), at an end thereof directed towards and adjacent to the second contact (320), has a contact tip (330) comprising an ignition tip (335) at an inner opening of the first contact (310) defined by the contact tip (330), and where the ignition tip (335) protrudes from a neighbouring, surrounding part of the contact tip (330) in the direction of the longitudinal center axis.