EP0877404A1 - Pneumatisch betätigbare Trennschalter für metallgekapselte Hochspannungsschaltanlagen - Google Patents

Pneumatisch betätigbare Trennschalter für metallgekapselte Hochspannungsschaltanlagen Download PDF

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Publication number
EP0877404A1
EP0877404A1 EP98410047A EP98410047A EP0877404A1 EP 0877404 A1 EP0877404 A1 EP 0877404A1 EP 98410047 A EP98410047 A EP 98410047A EP 98410047 A EP98410047 A EP 98410047A EP 0877404 A1 EP0877404 A1 EP 0877404A1
Authority
EP
European Patent Office
Prior art keywords
disconnector
compartment
contact
movable contact
circuit breaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98410047A
Other languages
English (en)
French (fr)
Inventor
Mario Lissandrin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric SE
Schneider Electric Industries SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schneider Electric SE, Schneider Electric Industries SAS filed Critical Schneider Electric SE
Publication of EP0877404A1 publication Critical patent/EP0877404A1/de
Withdrawn legal-status Critical Current

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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
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/302—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator for fluid insulated switchgear, wherein the insulating fluid is also the working fluid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/32—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact

Definitions

  • Line or switch disconnectors used in high armored substations tension allow on the one hand to realize by appropriate maneuvers, different connection diagrams according to the type of electrical network, and on the other hand to isolate for security reasons, certain parts of the circuit in the event of intervention on the network.
  • each disconnector is generally equipped with a mechanism with manual control or remote control by a geared motor for mechanical actuation of the movable contact between the open and closed positions closing.
  • disconnectors in shielded substations require occasional testing or maintenance operations, cutting the main artery of the network, and to earth on either side of the circuit breaker.
  • Such a testing process uses two line disconnectors, and two earthing switches, as shown in the document US-A-3987260.
  • the different commands of line disconnectors and earthing must be synchronized. The cost of manufacturing and maintenance of such a post is high.
  • the document FR-A-2147044 describes a shielded high voltage disconnector, the movable contact is actuated by a piston housed in a hollow conductor arranged in cylinder.
  • the piston is subjected to the differential pressure of the insulating gas, and comprises a latching device cooperating with projections or recesses provided for inside the conductor.
  • the object of the invention is to simplify the control of a high disconnector voltage using the energy of the shielded station isolation gas.
  • the disconnector according to the invention is characterized in that the first compartment is formed by the expansion volume of a circuit breaker associated with the envelope of the disconnector, and in communication with a tank containing a compressor, and control means for adjusting the pressure of the insulating gas in the volume expansion of the circuit breaker to a value greater than that of the second compartment of the disconnector during normal station operation.
  • the same compressor is thus used for the operation of the circuit breaker and the disconnector closing command.
  • the same SF6 gas is used for isolation, breaking of the arc in the circuit breaker, and the combined control of the circuit breaker and the disconnector.
  • control means comprise at minus a solenoid valve intended to ensure the exhaust of the gas from the first compartment towards the tank during the disconnector opening phase.
  • the movable contact of the disconnector is with an annular collar having a diameter slightly larger than that of the rod of the movable contact, and intended to slide tightly inside the socket to guarantee the seal between the two compartments when moving the movable contact between the open position and the closed position.
  • the socket cylindrical has two stops cooperating with the flange at the end of travel displacement of the movable contact, the axial offset between the two stops being slightly greater than the isolation interval.
  • a line disconnector 10 of a high shielded substation voltage and gas isolation has at least one disconnect pole comprising a first fixed contact 12 tubular, and a second fixed contact 14 tubular, carried respectively by support insulators 16, 18 spaced one of the other along the axial direction of a sealed metallic envelope.
  • the interior of the envelope 20 is filled with insulating gas with high dielectric strength, in particular sulfur hexafluoride SF6, and is subdivided by an insulator 22 intermediate in two adjacent compartments 24, 26.
  • the insulator 22 is crossed axially by a cylindrical and conductive sleeve 28, at the interior of which is slidably mounted a movable contact 30 in the form of a rod cylindrical.
  • the intermediate part of the movable contact 30 is equipped with a flange 32 annular having a diameter slightly larger than that of the contact rod mobile 30.
  • the flange 32 acts as a double-acting piston displaceable in alternating translation inside the socket 28 between two end stops 34, 36, which are formed by curved parts formed at opposite ends of the socket 28.
  • the flange 32 is provided with seals cooperating with the socket 28 for guarantee sealing between the two compartments 24, 26 when the movable contact 30 is in the open position (figure 1) or in the closed position (figure 2) and also during its movement between these two positions.
  • Each fixed contact 12, 14 is shaped according to an annular ring having a internal diameter, corresponding to the external diameter of the movable contact 30.
  • the first fixed contact 12 is cantilevered by a conductive member 38 in the form of bell, secured to the support insulator 16, and located in the first compartment 24.
  • the second fixed contact 14 is carried in overhang by a bell-shaped conductive member 40 fixed to the other insulator support 18, and arranged in the second compartment 26.
  • Tubing 42 connects the first compartment 24 of the envelope 20 to a reservoir 44 containing a compressor 46, and a control solenoid valve 48.
  • the displacement of the movable contact 30 takes place by means of the differential pressure gas contained in the two compartments 24, 26 of the envelope 20.
  • the piston of the collar 32 drives the movable contact 30 to the right, so as to bring it to the end of the closing stroke in engagement with the second fixed contact 14 ( Figure 2).
  • the disconnector 10 is then in the closed position.
  • the disconnector 10 is opened when the pressure of the SF6 gas inside of the second compartment 26 is greater than that generated in the first compartment 24.
  • the piston of the collar 32 is then biased to the left at inside the socket 28, and causes the sectioning with the formation of a isolation interval 50 ( Figure 1).
  • the pressure drop in the first compartment 24 is obtained following the excitation from the solenoid valve 48 causing a gas discharge to the reservoir 44 through the tubing 42.
  • Switching on compressor 46 increases the pressure in the first compartment 24 up to a predetermined threshold so as to cause the closing of the disconnector 10.
  • the position of the movable contact 30 is bistable, the change of position quickly performed from the start of the travel stroke in a one way or the other.
  • the disconnector 10 is associated with a circuit breaker 52 fitted with a pneumatic control mechanism 54 of the type described in patent EP-A-465377 of the applicant.
  • Each pole of the circuit breaker 52 comprises a pair of separable contacts 56, 58, and an arc extinguishing device 60 made active when the contacts 56 are separated, 58.
  • One of the contacts 58 is in connection with a start 62, while the other contact 56 is in electrical connection with the first fixed contact 12 of the disconnector 10.
  • the expansion volume 64 of the circuit breaker 52 in this case corresponds to the first compartment 24 of the device of FIGS. 1 and 2, and is in communication with the reservoir 44 containing the compressor 46.
  • the second compartment 26 of the disconnector 10 is separated from the expansion volume 64 by the support insulator 22 carrying the movable contact 30 bistable, which is movable between the two stops of the socket 28 conductive.
  • the other two insulators 16, 18 are not necessary, the second fixed contact 14 being electrically connected to a phase of a busbar 70 three-phase power supply.
  • the gas pressure insulation inside the expansion volume 64 of the circuit breaker 52 is of the order of 6 bars, while the gas pressure in the second compartment 26 of the disconnector 10 is approximately 4 bars.
  • Such a pressure differential maintains permanently the disconnector 10 in the closed position so as to guarantee the supply of the circuit breaker 52, and of the flow 62.
  • the pressure of the insulating gas in the expansion volume 64 is adjusted by the compressor 46 during operation normal, or during a cut-out made by circuit breaker 52.
  • the disconnector 10 recloses as soon as the compressor has re-inflated the expansion volume 64 at a pressure greater than 4 bars.
  • the disconnector 10 of Figures 3 and 4 is arranged according to a line disconnector, to which is associated with a manually operated earthing switch 72.
  • the disconnector earthing 72 comprises a contact pin 74 sealingly crossing a orifice 76 of the metal casing 20 in a direction perpendicular to the contact mobile 30.
  • Pin 74 is at ground potential, and its free end is likely to enter the expansion volume 64 to engage in a hole the conductive sleeve 28 carried by the support insulator 22.
  • the outlet 62 includes also a quick-closing earthing switch 78 to ensure proper to the ground of departure 62.
  • the solenoid valve 48 is not necessary when the disconnector 10 is used only safety device in the event of intervention on the circuit breaker 52.

Landscapes

  • Gas-Insulated Switchgears (AREA)
EP98410047A 1997-05-05 1998-04-30 Pneumatisch betätigbare Trennschalter für metallgekapselte Hochspannungsschaltanlagen Withdrawn EP0877404A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9705743A FR2762924B1 (fr) 1997-05-05 1997-05-05 Sectionneur a commande pneumatique pour un poste blinde a haute tension
FR9705743 1997-05-05

Publications (1)

Publication Number Publication Date
EP0877404A1 true EP0877404A1 (de) 1998-11-11

Family

ID=9506752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98410047A Withdrawn EP0877404A1 (de) 1997-05-05 1998-04-30 Pneumatisch betätigbare Trennschalter für metallgekapselte Hochspannungsschaltanlagen

Country Status (2)

Country Link
EP (1) EP0877404A1 (de)
FR (1) FR2762924B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1503487A (fr) * 1965-12-13 1967-11-24 Westinghouse Electric Corp Sectionneur
FR2069021A5 (de) * 1969-11-05 1971-09-03 Coq Nv
FR2147044A1 (de) * 1971-07-29 1973-03-09 Siemens Ag
US3987260A (en) * 1974-12-05 1976-10-19 I-T-E Imperial Corporation Ground and test connection for SF6 insulated bus
EP0465377A1 (de) * 1990-06-26 1992-01-08 Schneider Electric Sa Hochspannungsleistungsschalter mit Isoliergas und pneumatischem Steuermechanismus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1503487A (fr) * 1965-12-13 1967-11-24 Westinghouse Electric Corp Sectionneur
FR2069021A5 (de) * 1969-11-05 1971-09-03 Coq Nv
FR2147044A1 (de) * 1971-07-29 1973-03-09 Siemens Ag
US3987260A (en) * 1974-12-05 1976-10-19 I-T-E Imperial Corporation Ground and test connection for SF6 insulated bus
EP0465377A1 (de) * 1990-06-26 1992-01-08 Schneider Electric Sa Hochspannungsleistungsschalter mit Isoliergas und pneumatischem Steuermechanismus

Also Published As

Publication number Publication date
FR2762924A1 (fr) 1998-11-06
FR2762924B1 (fr) 1999-06-11

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