EP0852805A1 - Agencement de commutation de haute puissance - Google Patents

Agencement de commutation de haute puissance

Info

Publication number
EP0852805A1
EP0852805A1 EP96931141A EP96931141A EP0852805A1 EP 0852805 A1 EP0852805 A1 EP 0852805A1 EP 96931141 A EP96931141 A EP 96931141A EP 96931141 A EP96931141 A EP 96931141A EP 0852805 A1 EP0852805 A1 EP 0852805A1
Authority
EP
European Patent Office
Prior art keywords
arrangement
compartment
venting chamber
plate
vent
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.)
Granted
Application number
EP96931141A
Other languages
German (de)
English (en)
Other versions
EP0852805B1 (fr
Inventor
Allen Wilkinson
David Albert Webb
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.)
Alstom T&D Long and Crawford Ltd
Original Assignee
GEC Alsthom T&D Long and Crawford Ltd
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 GEC Alsthom T&D Long and Crawford Ltd filed Critical GEC Alsthom T&D Long and Crawford Ltd
Publication of EP0852805A1 publication Critical patent/EP0852805A1/fr
Application granted granted Critical
Publication of EP0852805B1 publication Critical patent/EP0852805B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs

Definitions

  • This invention relates to high power switching a ⁇ angements and is particularly, but not
  • switchgear is filled with an insulating gas such as SF6. Under some conditions, faults or
  • the compartment may explode, resulting in destruction of the compartment and possibly endangering personnel standing nearby.
  • the membrane is supported by a plate retained in the orifice by lugs. As the pressure increases the plate is forced through the orifice and the membrane ruptures, allowing the products of
  • a high power switching arrangement comprising a compartment filled with insulating gas and housing switchgear and a pressure relief
  • vent which blows if pressure within the compartment exceeds normal operating values; and a venting chamber arranged to receive gases exhausted via the vent from the compartment, characterised in that the venting chamber comprises in series a turbulence inducing means to
  • high power it is meant high voltage or high current or a combination of the two.
  • vents are extremely hot and, in the absence of the venting chamber, tend to billow around the switching arrangement, exposing the apparatus and any personnel in its vicinity to serious risks.
  • a venting chamber in the switching arrangement as defmed above to receive the gases in a safe region away from equipment and personnel, the flow of gases is controlled and in addition any debris produced during the explosion is contained, thus significantly
  • venting chamber enables energy to be extracted from arc by-products in the case of
  • the turbulence inducing means comprises a deflecting plate.
  • the deflecting plate may have a slot extending therethrough, and the slot may be of sinuous
  • a part or the whole of at least one edge of the deflecting plate may be of saw-toothed formation, and the deflecting plate may inco ⁇ orate turbulence inducing
  • the gas flow directing means comprises a plate having at least
  • the or each orifice may have a respective hollow tube mounted
  • a plurality of said tubes may be arranged at different angles relative to the plate with
  • the angles selected to give a predetermined flow pattern of gases towards the output port may be adjustable.
  • the arrangement may have a front part at or in which manual controls are located with the venting chamber outlet located at the rear of the arrangement.
  • the venting chamber may be located on a wall ofthe compartment and may provide structural support to the compartment.
  • FIG. 1 schematically shows a high power switching unit in accordance with the
  • Figure 2 illustrates part of the unit of Figure 1 in greater detail and in section;
  • Figure 3 is an enlarged view of the deflecting plate of Figure 2 as mounted in the venting
  • a high power switching arrangement 1 includes a
  • compartment 2 housing a number of electrical components such as fuses, switches, earth switches, busbars and test devices.
  • This compartment 2 is gas tight and filled by an insulating gas, SF6, which is present to suppress arcing between the high power components.
  • Hatches 3 and 4 permit access to components such as fuses, which might need replacing,
  • the switching unit may be free standing or may be suspended above the ground, being
  • a vent 8 is located in a wall 20 of the compartment 2 and comprises a membrane across
  • a venting chamber 9 is located on the compartment wall
  • the venting chamber 9 includes turbulence inducing means which, as shown, take the
  • the plate 31 will be fixed to the walls by any means
  • a gas flow directing means Spaced from the deflecting plate 31 is a gas flow directing means which in this
  • embodiment takes the form of a flow control plate 41 also extending vertically from the top to
  • the plate 41 is formed with a series of orifices 42 spaced horizontally across the plate 41 and each of which receives a hollow tube 43.
  • Each hollow tube 43 may extend with its longitudinal axis at the same angle to the surfaces ofthe plate 41 and this may be a right angle,
  • each tube 43 is set at a different angle.
  • tube(s) close to one end of the plate 41 may be set at right angles
  • tube(s) in the intermediate region may be set at an angle of 82.5°
  • the plate 41 may be set at an angle of 75°, but other orientations are possible, and in certain
  • the arrangement of the plate 41 and its associated tube(s) is selected to give a controlled
  • vent 8 During normal performance of the switching unit, the vent 8 remains intact and the venting chamber is not involved in its operation. However, if there is catastrophic failure within
  • membrane of the vent 8 is ruptured directly or by a plate associated therewith, allowing the hot
  • the plate 41 acts to give a controlled directed
  • vent which may simply be the open end of the chamber 9 or an orifice therethrough; and the vent may comprise an angled deflector wall.
  • gases blow a hinged vent flap open and are safely vented sideways and/or upwards.
  • any appropriate arrangement is possible, e.g. the plates may be angled
  • plate 31 may involve other means for inducing
  • a pressure relief vent may be any suitable pressure relief vent.
  • venting chamber may be fitted above the compartment 2.

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Catching Or Destruction (AREA)
  • Patch Boards (AREA)
  • Circuit Breakers (AREA)

Abstract

Un agencement de commutation de haute puissance comporte un compartiment (2) contenant des éléments de commutation ainsi qu'un gaz d'isolation et une chambre de ventilation (9) située en dessous du compartiment. Un évent (8) situé dans la paroi du compartiment (2) permet d'évacuer, en cas de défaillance majeure du système, les gaz produits vers la chambre de ventilation qui comporte d'une part une plaque (31) destinée à leur imprimer un flux tourbillonnaire et, d'autre part une plaque (41) située en aval de la première plaque (31) afin de maîtriser ce flux et de le diriger vers un orifice de sortie.
EP96931141A 1995-09-25 1996-09-18 Agencement de commutation de haute puissance Expired - Lifetime EP0852805B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9519548 1995-09-25
GB9519548A GB2305544A (en) 1995-09-25 1995-09-25 High power switching arrangement
PCT/GB1996/002304 WO1997012383A1 (fr) 1995-09-25 1996-09-18 Agencement de commutation de haute puissance

Publications (2)

Publication Number Publication Date
EP0852805A1 true EP0852805A1 (fr) 1998-07-15
EP0852805B1 EP0852805B1 (fr) 1999-12-01

Family

ID=10781242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96931141A Expired - Lifetime EP0852805B1 (fr) 1995-09-25 1996-09-18 Agencement de commutation de haute puissance

Country Status (7)

Country Link
EP (1) EP0852805B1 (fr)
AU (1) AU6993996A (fr)
DE (1) DE69605436T2 (fr)
GB (1) GB2305544A (fr)
NO (1) NO981336L (fr)
WO (1) WO1997012383A1 (fr)
ZA (1) ZA967943B (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2345375A (en) * 1942-12-19 1944-03-28 Gen Electric Electric circuit breaker
US3025376A (en) * 1958-05-13 1962-03-13 Ite Circuit Breaker Ltd Arc chute for circuit breakers
GB2235582B (en) * 1989-08-25 1993-09-29 Long & Crawford Limited Explosion vent arrangement
GB2252671B (en) * 1991-02-07 1994-08-03 Long & Crawford Limited High power switching arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9712383A1 *

Also Published As

Publication number Publication date
DE69605436D1 (de) 2000-01-05
WO1997012383A1 (fr) 1997-04-03
NO981336L (no) 1998-05-20
AU6993996A (en) 1997-04-17
GB2305544A (en) 1997-04-09
ZA967943B (en) 1997-04-07
EP0852805B1 (fr) 1999-12-01
NO981336D0 (no) 1998-03-24
GB9519548D0 (en) 1995-11-29
DE69605436T2 (de) 2000-05-04

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