Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/02—Details
  • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
  • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
  • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
  • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
  • H01H33/904—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism characterised by the transmission between operating mechanism and piston or movable contact
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
  • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
  • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
  • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas

Definitions

• the invention relates to the field of circuit breakers for high voltage and very high electrical voltage (shielded and dead tank) comprising, for each phase, at least two chambers of aligned cuts and a common transmission.
• short circuit current for example
• tie rods external to the chambers are used to open the set of moving contacts simultaneously.
• the use of such tie rods implies the need to use also cowlings as well as to provide long distances of insulators, that is to say significant distances between these tensioning rods and the metal tanks to the potential of the Earth.
• Document CH 620790 shows a circuit breaker structure with two interrupting chambers 2a, 2b in which the transmission of motion is via an insulating actuating tube 3 fixed to each compression cylinder 4a, 4b of the chambers. cutoff, itself attached to the tulip 14a, 14b and the nozzle 17a, 17b, the actuating tube 3 surrounding the fixed arc rod 12b of the first chamber (see Figure 1).
• the document FR 2267625 shows a structure of circuit breakers with at least two aligned chambers in which the transmission of movement is done by means of internal tie rods 39 which connect the movable arc rod 25 of the first chamber to the mobile cylinder 31 end which is reported the nozzle 37.
• the object of the invention is then to propose a solution that makes it possible to reduce the radial size and the total length of the circuit breaker.
• the invention relates to a high or very high voltage circuit breaker comprising, per phase, at least two aligned breaking chambers, in which each chamber comprises a pair of main contacts, a pair of arcing contacts each secured to each other. one of the main contacts and a nozzle for blowing the hot gases from the break, the pairs of contacts being partly of complementary male and female shapes and each comprising at least one movable contact, the nozzle being integral with the main contact and the arc mobile, in which the simultaneous movement transmission between the movable contacts of the first chamber and those of the second chamber is performed by a transmission assembly, integral directly on the one hand mobile main contact of the first chamber and secondly of the moving arc contact of the second chamber, the set of transmission being contained inside the two breaking chambers.
• the movement is simultaneously transmitted from one chamber to the other directly through the main contact of the first chamber.
• the cowlings used according to the prior art are no longer necessary and at least part of the transmission assembly can be made of metal.
• the mechanical grip of the transmission assembly according to the invention is directly on the main contact tube which must therefore withstand mechanical tensile forces / compression.
• the transmission assembly is contained completely inside the two breaking chambers. This reduces the radial size but also reduces the length of the circuit breaker.
• the transmission assembly is contained inside the two breaking chambers by arrangement between respectively the nozzle and the main contacts between the fixed main contact and the fixed arc contact of the first chamber and between the first chamber and the end of the movable arc contact of the second chamber closest to the first chamber.
• each pair of contacts comprises two movable contacts, additional transmission means for mutually separating the main and arc contacts during a break being provided for each chamber.
• one of the arcing contacts of at least the first interrupting chamber is fixed and in the form of an arc rod extended by at least one foot integral with a fixed external wall of the circuit breaker, the transmission assembly secured directly to the movable main contact of the first chamber and the moving arc contact of the second chamber being arranged in part in the space delimited by the foot (s) and the fixed outer wall.
• the fixed bow rod is extended by a tripod to the fixed outer wall.
• the transmission assembly comprises an insulating part integral with the movable main contact and electrically connected in parallel with the nozzle of the first chamber, the insulating part being arranged coaxially with the nozzle and, where appropriate, with the less partially in support against the nozzle.
• the movable arc contact of the second breaking chamber is in the form of a hollow cylinder and, all of transmission comprises a transmission part coupled directly to the hollow cylinder via an axis.
• the transmission assembly may comprise connecting rods and / or a tube.
• the tube of the transmission assembly is perforated so as to leave a passage for the foot (s) of the fixed arc contact.
• the transmission assembly comprises an insulating portion partially surrounding the nozzle in the direction of its length and directly attached to the movable main contact of the first chamber.
• an insulating part of the transmission assembly and the blowing nozzle are made in one piece.
• the movement input can be made by arc contact in the form of a rod or by arc contact in the form of a tulip.
• the invention also relates to the use of a circuit breaker previously described as part of a metal envelope station (PSEM).
• PSEM metal envelope station
• FIGS. 1 and 2 show, in longitudinal half-section view, a very high voltage circuit breaker according to one embodiment of the invention in the open position, that is to say after making a cut.
• Figure 2 shows the circuit breaker of Figure 1 but in the closed position, that is to say off.
• the circuit breaker high or very high voltage D shown comprises, per phase, at least two breaking chambers Ca, Cb, Cc aligned along the axis
• Each chamber Ca, Cb comprises respectively a pair of main contacts 7a, 8a, 7b, 8b, a pair of arcing contacts la, 2a; Ib, 2b integral each of one of the main contacts in part of complementary male and female forms.
• Each pair of contacts comprises a single main contact 7a, 7b or arc la; Ib mobile.
• Each chamber Ca, Cb further comprises a nozzle 3a, 3b blowing hot gases from the cut, the nozzle
• the movement input is usually done, that is to say by a connecting rod or insulating rod operating circuit breaker not shown and coupled directly to the arc contact.
• the movement of a breaking chamber C1 of the high or very high voltage circuit-breaker D is simultaneously transmitted to the other chamber C2 via the movable main contact 7a passing inside the chambers ( Figures 1 and 2).
• the motion transmission of the movable arcing contact la from the first chamber Ca to that of the second chamber Cb is carried out by a transmission assembly 4, 40, 41 integral directly, on the one hand with the movable main contact 7a of the first chamber Ca and secondly, the movable arc contact Ib of the second chamber, the transmission assembly 4 being contained inside the two breaking chambers Ca, Cb.
• the transmission assembly 4 illustrated is such that it is arranged between, respectively, the nozzle 3a and the main contacts 7a, 8a, between the fixed main contact 8a and the fixed arc contact 3a of the first chamber Ca and between the latter 3a and the end of the movable arc contact Ib of the second chamber Cb closest to the first chamber Ca.
• the arc contacts 2a, and 2b of the breaking chambers Ca and Cb are fixed and each is in the form of an arc rod extended by a tripod 20a, 20b to the fixed outer wall 5 of the circuit breaker.
• the transmission assembly 4 is secured directly to the movable main contact 7a of the first chamber Ca and the movable arc contact of the second chamber in the form of a hollow cylinder Ib.
• the transmission assembly 4 comprises a transmission part 41 coupled directly to the hollow cylinder Ib via an axis 6 (a other fastening system is possible since the degree of freedom provided by the axis is not absolutely necessary - a screw connection is also possible).
• the transmission assembly 4 consists of a composite tube 40.41.
• the insulating tubular portion 40 electrically connected in parallel with the nozzle 3a and a tubular portion 41 whose material is not of electrical importance (or dielectric) and whose primary function is therefore to transmit the movement between the two rooms Ca, Cb.
• This function can very well be provided by a single insulated connecting rod, which makes it possible to have only one part to realize and to implant.
• a cowling can be useful to protect them from hot gases from the cut.
• the movement transmission parts 4, 40, 41 are of revolution, arranged around the axis XX ', and have slots for the passage of the fasteners 20a (tripod) of the cutoff rod 2a.
• the transmission assembly 4 comprises an insulating portion 40 partially surrounding the nozzle 3a in the direction of its length, being directly in abutment with it, and fixed directly to the movable main contact 7a of the first chamber Ca for to separate from the fixed main contact 8a during a break.
• Various modes of attachment can be envisaged between the insulating part 40 sandwiched between the nozzle 3a and the main contact 7a: by direct screwing / bolting between these two parts, by screwing / bolting via a metal part attached between these two parts, the tube bonded to a metal flange itself fixed to the mobile contact.
• the circuit breaker comprises at least a third chamber Cc, not shown, the simultaneous transmission of motion between the second chamber Cb and this third Cc being carried out in the same manner as that between the first Cs and the second one.
• Cb that is to say with another set 4, 40, 41 built and secured identically.
• the insulating part 40 of this other assembly also partially surrounds the nozzle 3b in the longitudinal direction, being directly against it and is fixed to the movable main contact 7b intended to separate from the main fixed contact 8b during a break .
• the fixed arc rods 2a, 2b are each extended by a tripod 20a, 20b. It goes without saying that any solution with one, two or more feet integral with the external fixed wall 5 is suitable.
• the solution with one or two feet arranged at 180 ° has the advantage of leaving more space for the passage of the portion 41 of the transmission assembly 4.
• the maneuvering movement input is made by the arc contact 3b in the form of a tulip.
• this one can just as easily make by the arc contact in the form of a tulip (like the one shown in 3b).

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• Circuit Breakers (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=39326283

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• 2007
  • 2007-10-15 FR FR0758322A patent/FR2922354B1/fr active Active
• 2008
  • 2008-10-14 EP EP08840350.6A patent/EP2201588B1/de active Active
  • 2008-10-14 WO PCT/EP2008/063768 patent/WO2009050154A1/fr not_active Ceased
  • 2008-10-14 US US12/682,586 patent/US8653395B2/en active Active
  • 2008-10-14 CN CN200880110541.2A patent/CN101821827B/zh not_active Expired - Fee Related

Non-Patent Citations (1)

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