A vacuum valve includes: an insulation container; a fixed-side electrode including a fixed-side contact, a fixed-side longitudinal magnetic-field coil generating a magnetic field on a surface of the fixed-side contact in an axial direction, and a fixed-side spacer; and a movable-side electrode including a movable-side contact, a movable-side longitudinal magnetic-field coil generating a magnetic field on a surface of the movable-side contact in the axial direction, and a movable-side spacer. The fixed-side longitudinal magnetic-field coil and the movable-side longitudinal magnetic-field coil each include an outer ring portion having an arc shape and a power feeding portion protruding from an end of the outer ring portion. The fixed-side or movable-side contact is brazed to the power feeding portion. The fixed-side and movable-side spacers are made of a material with lower conductivity than materials of the fixed-side and movable-side longitudinal magnetic-field coils, or made of an insulator.

The disclosure discloses an optical path system for detecting a vacuum degree of a vacuum switch and a method thereof. In the optical path system, a plasma excitation unit excites pulsed laser along an excitation optical path to bombard a shielding case of a vacuum switch to be detected, so as to generate laser plasma; an optical path focusing unit focuses the excitation optical path and a collection optical path to focus the pulsed laser on the shielding case of the vacuum switch to be detected; the optical path focusing unit includes a visible laser device for generating visible light and an adjustment device for adjusting the excitation optical path; an image collection unit collects a laser plasma image and a visible light spot focusing image; the image collection unit includes a gated detector for collecting the visible light spot image and the laser plasma image via the collection optical path; a vacuum degree detection unit is connected with the image collection unit to process the laser plasma image and extract characteristic parameters; and the vacuum degree detection unit includes a processing module for obtaining, according to a relation between the characteristic parameters and a vacuum degree, the vacuum degree of the vacuum switch to be detected.

image collection unit collects a laser plasma image and a visible light spot focusing image; the image collection unit includes a gated detector for collecting the visible light spot image and the laser plasma image via the collection optical path.

An insulating housing with integrated functions comprises a barrel-shaped shell, an interior wall of which being provided with a protruded or recessed uneven texture configured to increase a creepage distance between both axial ends of the barrel-shaped shell, the path of the creepage distance formed by the protruded or recessed uneven texture having more than two flyover or bypass sub-paths, such that the creepage distance is increased, and the voltage withstanding is increased. Meanwhile, by employing a construction of creepage-increasing rings, not only the creepage distance is increased greatly, but also the barrel-shaped shell is avoided from full-interior wall contamination by metal vapor evapotranspiration. Thus, under the double effects of a greater creepage distance and a greater proportion of uncontaminated area, the voltage withstanding and after arcing insulation level of the insulating housing with integrated functions are improved greatly, while the after arcing electric insulation level of the vacuum interrupter is not decreased, such that the insulating housing with integrated functions and the vacuum interrupter is developing towards high voltage and ultra-high voltage.

A “five-prevention” interlocking pole type high-voltage switchgear includes a pole bracket, embedded poles, and spring and earthing isolated switch operating mechanisms; every three poles are arranged in a row on the bracket, the spring operating mechanism is joined with the switch operating mechanism through the chamber door interlocking piece and mechanism interlocking piece; the chamber interlocking piece, mechanism interlocking piece and door lock plate are joined, the door lock plate is opposite the opening semi-axis pinch plate in the spring operating mechanism and the door lock plate is set with a door lock pin. Chamber interlocking piece movement is used to open or close the switch operating mechanism crank operation hole and corresponds to the start of close brake operation and limit brake of opening pinch plate in the spring operating mechanism and the limiting and opening of the opening semi-axis and cable chamber door in the spring operating mechanism.

An integrated assembly includes a switchgear apparatus for operation at voltages up to 72.5 kV and a mount assembly for coupling to a pole and to support the switchgear apparatus. The mount assembly includes a crossbar, a pole mount, a mounting bracket to support the switchgear apparatus, and a pair of crossbar mounts for supporting the mounting bracket on the crossbar at different positions. Each crossbar mount includes a first arm, a second arm spaced from the first arm and extending parallel to the first arm, a third arm extending between and coupled to a distal end of each of the first and second arms, and a flange extending between and coupled to a proximal end of each of the first and second arms. The flange extends parallel to the third arm. The first, second, and third arms and the flange form an enclosed space to receive the crossbar.

A double-contact switch has first and second tubular vacuum switching chambers; a stationary electrode, between the first and second vacuum switching chamber, having a first stationary contact protruding into the first chamber and a second stationary contact protruding into the second chamber; a first electrode, arranged in the first chamber, moveable axially therein, having a contact support region and sealed off from the first chamber exterior; a second electrode, arranged in the second chamber, moveable axially therein, having a contact support region and scaled off from the second chamber exterior; a first contact compression spring applying a first spring force to the first movable electrode so the first electrode contact presses onto the contact protruding into the first chamber; and a second contact compression spring applying a greater, second spring force to the second movable electrode so the second electrode contact presses onto the contact protruding into the second chamber.

It is provided an interrupter assembly for power distribution systems that is improved in terms of at least one of compactness, durability, synchronicity and dielectric withstand.

An embedded pole is provided. The embedded pole includes an insulation shell, a conductive circuit, wherein at least a portion of the conductive circuit is housed within the insulation shell, and a ventilation system including an external heat sink coupled to the conductive circuit and external to the insulation shell, and an internal heat sink coupled to the conductive circuit and positioned within the insulation shell.

A vacuum interrupter includes a housing having at least one annular ceramic insulating element which forms a vacuum chamber. A contact system has two contacts which are movable relative to one another. A capacitive element has two electrodes and a dielectric material disposed between the electrodes. The capacitive element is form-lockingly mounted on the insulating element and has a capacitance between 400 pF and 4000 pF. A high-voltage switching assembly including the vacuum interrupter is also provided.

A gas-insulated switching device includes: a vacuum valve having a movable contact provided on one side of a movable conductor and a fixed contact provided to a fixed conductor; an insulation rod connected to another side of the movable conductor led out from the vacuum valve through a bellows; an operation rod connecting the insulation rod and an operation device; an airtight container in which the insulation rod, the other side of the movable conductor, and the operation rod are accommodated; and an intermediate pressure chamber formed by communication between internal spaces of the bellows and the airtight container. A sliding contact member is provided to the other side of the movable conductor. The sliding contact member is connected, via the airtight container, to a main circuit conductor. A communication portion provided between the airtight container and the sliding contact member allows communication inside the airtight container.