High-tension or heavy-current switches with arc-extinguishing or arc-preventing means

HELECTRICITY H01Electric elements H01HELECTRIC SWITCHES RELAYS SELECTORS EMERGENCY PROTECTIVE DEVICES

H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means

H01H33/002Very heavy-current switches H01H33/004making use of superconducting contacts H01H33/006adapted for interrupting fault currents with delayed zero crossings H01H33/008Pedestal mounted switch gear combinations H01H33/02Details H01H33/021Use of solid insulating compounds resistant to the contacting fluid dielectrics and their decomposition products H01H33/022particular to three-phase circuit breakers H01H33/025Terminal arrangements H01H33/027Integrated apparatus for measuring current or voltage H01H33/04Means for extinguishing or preventing arc between current-carrying parts H01H33/045for arcs formed during closing H01H33/06Insulating body insertable between contacts H01H33/08Stationary parts for restricting or subdividing the arc H01H33/10Metal parts H01H33/12Auxiliary contacts on to which the arc is transferred from the main contacts H01H33/121Load break switches H01H33/122both breaker and sectionaliser being enclosed H01H33/123in which the auxiliary contact pivots on the main contact-arm and performs a delayed and accelerated movement H01H33/124the auxiliary contact being a whip contact H01H33/125comprising a separate circuit breaker H01H33/126being operated by the distal end of a sectionalising contact arm H01H33/127movable with a sectionalising contact arm and operated by such movement H01H33/128being operated by a separate mechanism interlocked with the sectionalising mechanism H01H33/14Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc H01H33/143of different construction or type H01H33/16Impedances connected with contacts H01H33/161Variable impedances H01H33/162Liquid resistors H01H33/164the impedance being inserted in the circuit by blowing the arc onto an auxiliary electrode H01H33/165Details concerning the impedances H01H33/166the impedance being inserted only while closing the switch H01H33/167the impedance being inserted only while opening the switch H01H33/168the impedance being inserted both while closing and while opening the switch H01H33/18using blow-out magnet H01H33/182using permanent magnets H01H33/185using magnetisable elements associated with the contacts H01H33/187comprising a hollow annular arc runner and a central contact between which a radially drawn arc rotates H01H33/20using arcing horns H01H33/22Selection of fluids for arc-extinguishing H01H33/24Means for preventing discharge to non-current-carrying parts H01H33/245using movable field electrodes H01H33/26Means for detecting the presence of an arc or other discharge H01H33/28Power arrangements internal to the switch for operating the driving mechanism H01H33/285using electro-dynamic repulsion H01H33/30using fluid actuator H01H33/302for fluid insulated switchgear, wherein the insulating fluid is also the working fluid H01H33/304Working fluid supplies H01H33/32pneumatic H01H33/34hydraulic H01H33/36using dynamo-electric motor H01H33/38using electromagnet H01H33/40using spring motor H01H33/42Driving mechanisms H01H33/423making use of an electromagnetic wave communication H01H33/44Devices for ensuring operation of the switch at a predetermined point in the ac cycle H01H33/46Interlocking mechanisms H01H33/48for interlocking between casing or cover and mechanism for operating contacts H01H33/50for interlocking two or more parts of the mechanism for operating contacts H01H33/52for interlocking two or more switches H01H33/53Cases Reservoirs, tanks, piping or valves, for arc-extinguishing fluid Accessories therefor H01H33/55Oil reservoirs or tanks Lowering means therefor H01H33/555Protective arrangements responsive to abnormal fluid pressure, liquid level or liquid displacement H01H33/56Gas reservoirs H01H33/561composed of different independent pressurised compartments put in communication only after their assemblage H01H33/562Means for avoiding liquefaction or for disposing of liquefaction products H01H33/563comprising means for monitoring the density of the insulating gas H01H33/565Gas-tight sealings for moving parts penetrating into the reservoir H01H33/57Recuperation of liquid or gas H01H33/58Silencers for suppressing noise of switch operation H01H33/59Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for H01H33/593for ensuring operation of the switch at a predetermined point of the ac cycle H01H33/596for interrupting dc H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid H01H33/62wherein the break is in air at atmospheric pressure H01H33/64wherein the break is in gas H01H33/66Vacuum switches H01H33/6606Terminal arrangements H01H33/662Housings or protective screens H01H33/66207Specific housing details H01H33/66238Specific bellows details H01H33/66261Specific screen details H01H33/664Contacts Arc-extinguishing means H01H33/6641making use of a separate coil H01H33/6642having cup-shaped contacts, the cylindrical wall of which being provided with inclined slits to form a coil H01H33/6643having disc-shaped contacts subdivided in petal-like segments H01H33/6644having coil-like electrical connections between contact rod and the proper contact H01H33/6645in which the coil like electrical connections encircle at least once the contact rod H01H33/6646having non flat disc-like contact surface H01H33/6647having fixed middle contact and two movable contacts H01H33/666Operating arrangements H01H33/6661Combination with other type of switch H01H33/6662using bistable electromagnetic actuators H01H33/6664with pivoting movable contact structure H01H33/668Means for obtaining or monitoring the vacuum H01H33/6683by gettering H01H33/68Liquid-break switches H01H33/70Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid H01H33/7007wherein the flow is a function of the current being interrupted H01H33/7015characterised by flow directing elements associated with contacts H01H33/7023characterised by an insulating tubular gas flow enhancing nozzle H01H33/703having special gas flow directing elements H01H33/7038characterised by a conducting tubular gas flow enhancing nozzle H01H33/7046having special gas flow directing elements H01H33/7053having a bridging element around two hollow tubular contacts H01H33/7061characterised by use of special mounting means H01H33/7069characterised by special dielectric or insulating properties or by special electric or magnetic field control properties H01H33/7076characterised by the use of special materials H01H33/7084characterised by movable parts influencing the gas flow H01H33/7092characterised by several arcing chambers in series H01H33/72having stationary parts for directing the flow of arc-extinguishing fluid H01H33/73wherein the break is in air at atmospheric pressure H01H33/74wherein the break is in gas H01H33/75Liquid-break switches H01H33/76wherein arc-extinguishing gas is evolved from stationary parts Selection of material therefor H01H33/765the gas-evolving material being incorporated in the contact material H01H33/77wherein the break is in air at atmospheric pressure H01H33/78wherein the break is in gas H01H33/80flow of arc-extinguishing fluid from a pressure source being controlled by a valve H01H33/82the fluid being air or gas H01H33/83wherein the contacts are opened by the flow of air or gas H01H33/84the fluid being liquid H01H33/85wherein the contacts are opened by the flow of liquid H01H33/86the flow of arc-extinguishing fluid under pressure from the contact space being controlled by a valve H01H33/88the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts H01H33/882the movement being assisted by accelerating coils H01H33/884with variable-area piston H01H33/886by movement of rotating pistons H01H33/90this movement being effected by or in conjunction with the contact-operating mechanism H01H33/901making use of the energy of the arc or an auxiliary arc H01H33/903and assisting the operating mechanism H01H33/904characterised by the transmission between operating mechanism and piston or movable contact H01H33/905the compression volume being formed by a movable cylinder and a semi-mobile piston H01H33/91the arc-extinguishing fluid being air or gas H01H33/92the arc-extinguishing fluid being liquid H01H33/94this movement being effected solely due to the pressure caused by the arc itself or by an auxiliary arc H01H33/95the arc-extinguishing fluid being air or gas H01H33/96the arc-extinguishing fluid being liquid H01H33/98the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow H01H33/982in which the pressure-generating arc is rotated by a magnetic field