EP1040542A1 - Court-circuiteur, notamment pour dispositif de protection contre les arcs de lumiere parasite, utilise dans des systemes de repartition d'energie electrique - Google Patents

Court-circuiteur, notamment pour dispositif de protection contre les arcs de lumiere parasite, utilise dans des systemes de repartition d'energie electrique

Info

Publication number
EP1040542A1
EP1040542A1 EP98959724A EP98959724A EP1040542A1 EP 1040542 A1 EP1040542 A1 EP 1040542A1 EP 98959724 A EP98959724 A EP 98959724A EP 98959724 A EP98959724 A EP 98959724A EP 1040542 A1 EP1040542 A1 EP 1040542A1
Authority
EP
European Patent Office
Prior art keywords
short
circuiter
circuiting
piston
gas generator
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Withdrawn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
EP98959724A
Other languages
German (de)
English (en)
Inventor
Frank Berger
Helge SCHÄFER
Thomas Freyermuth
Wolfgang Kremers
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.)
Eaton Industries GmbH
Original Assignee
Moeller GmbH
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
Priority claimed from DE19746564A external-priority patent/DE19746564A1/de
Priority claimed from DE1997146815 external-priority patent/DE19746815A1/de
Application filed by Moeller GmbH filed Critical Moeller GmbH
Publication of EP1040542A1 publication Critical patent/EP1040542A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H79/00—Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H39/004—Closing switches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/065—Means for detecting or reacting to mechanical or electrical defects
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/02—Open installations

Definitions

  • Short circuiter in particular for an arc fault protection device for use in systems for distributing electrical energy
  • the He Indation relates to a short circuiter according to the preamble of claim 1.
  • a short circuiter has become known from WO 95/22167, which is used as a series product in low-voltage switchgear and has proven itself in practical use.
  • WO 95/22167 which is used as a series product in low-voltage switchgear and has proven itself in practical use.
  • the relatively large number of components required creates a relatively large volume of equipment.
  • Short-circuiters with a gas generator are known from DE 196 01 639 A1 and DE 42 36 623 A1.
  • the short circuiter from DE 42 36 623 A1 has a pressurized piston.
  • a disadvantage of DE 42 36 623 A1 is the guidance or impact movement of the piston, which is dependent on manufacturing tolerances.
  • a transport lock is achieved by a spring counteracting the piston. The disadvantage here is that the spring force increases with increasing distance.
  • the object of the invention is to provide a short-circuiter using a gas generator according to the preamble of claim 1, in which the piston performs an optimal impact movement regardless of manufacturing tolerances and is at the same time secured for transport.
  • FIG. 1 is a perspective view of a first embodiment of the short circuit ready for connection
  • Fig. 2 is a sectional view of a first embodiment of the
  • Fig. 3 is an enlarged detail of that shown in Fig. 2
  • Fig. 4 is a sectional view of the first embodiment of the
  • Fig. 5 is a sectional view of a second embodiment of the
  • Fig. 6 is a sectional view of a third embodiment of the
  • Fig. 7 is a sectional view of a fourth embodiment of the
  • Fig. 8 is a sectional view of a fifth embodiment of the
  • FIG. 9 shows an illustration of the assembly of the short-circuiting unit according to FIG. 2,
  • Fig. 10 is a schematic diagram of the assembly of the short-circuiting piston and
  • FIG. 11 shows a schematic diagram of the short-circuiting piston in the tripped position according to FIG. 4.
  • 1 shows the ready-to-connect short-circuiter 1 with three connection rails 2, 3, 4 arranged flat next to one another in the form of flat rails with corresponding connection bores 5, as are customary in low-voltage plant construction.
  • the middle connecting bar 3 is electrically connected at the end or at the opposite end of the connecting bores 5 to a cross-current bar 6, the cross-current bar 6 being insulated from the connecting bars 2, 4 in the non-tripped state.
  • the rail arrangement is E-shaped.
  • two short-circuiting units 7, 8, each with a gas generator drive based on nitrocellulose, are arranged, as is used in airbags or belt tensioners.
  • the connecting rails 2, 3, 4, the cross-current rail 6 and further insulation parts described later are held with a total of twelve screw-nut connections 9 and spring washers 10 to form an E-shaped package.
  • the short-circuiting units 7 and 8 are controlled by evaluation electronics, which are provided with fast current and light sensors for arc fault detection.
  • the control can be done with any kind of sensors.
  • the short-circuiter can also be used to protect consumers and equipment in the event of a short-circuit.
  • FIG. 2 shows a sectional illustration of a first embodiment of the short-circuiting unit, FIG. 3 showing an enlargement.
  • the short-circuiting unit 7 consists of a gas generator 11, an encapsulation 12 made of metal for the gas generator 11 with a first capsule part 13 designed as a union nut, which is screwed onto a second capsule part 14.
  • the second capsule part 14 has an external thread at the top and bottom and a nut-shaped part 15 in the middle, the lower external thread being provided for screwing a first upper insulating plate 16.
  • the gas generator 11 is embedded gas-tight in the encapsulation in such a way that the first capsule part 13 presses the gas generator on sealing surfaces 17-20 against the second 14 capsule part and the gas pressure can only have an effect downwards.
  • the first capsule part 13 is provided with an ignition opening 21 for an ignition line.
  • the short-circuiting unit 7 has a first pressure chamber 22 and a second pressure chamber 23, the gas generator 11 being arranged in the first pressure chamber 22 and a pressure membrane 24 being present on the opposite side of the gas generator 11, which separates the first and second pressure chambers 22, 23 and breaks when a defined pressure is exceeded.
  • the short-circuiting element 25 is arranged like a piston. When the drive is ignited, the short-circuiting element 25 moves suddenly in times within a millisecond.
  • the peak pressure after the pressure membrane 24 has broken away is 600 to 900 bar, preferably 800 bar.
  • the short-circuiting element 25 is a short-circuiting bolt, which consists of an upper cylindrical section 26, a conical section 27 with Morse taper 2 and a lower cylindrical section 67, the cylindrical section 26 being almost flush, ie with a clearance fit, in the piston guide and the lower one cylindrical portion is provided with a clearance fit with the bore 33.
  • encapsulation 12 is a cross-sectionally H-shaped insulating sleeve 28 made of insulating material, on which on one side the gas generator 11 is arranged in a gas-tight and electrically insulated manner from the short-circuiting bolts and on the other side of the short-circuiting bolts is guided in a piston-like manner, the transverse part being the Pressure membrane 24 is.
  • the pressure membrane 24 is also provided with predetermined breaking points.
  • the insulating sleeve 28 is provided on the piston side with a collar 29 which is clamped between the first insulating plate 16 and the connecting bar 2 and additionally has an electrically insulating effect.
  • the short-circuiting piston or element 25 is provided with an O-ring 30. It can also be provided with two or more O-rings arranged at a distance.
  • the O-ring is arranged in the short-circuiting piston in a groove-like receptacle and is designed as a rubber-like seal.
  • the top of the short-circuiting piston lies flush against that of the pressure membrane 24, so that when the piston moves in the non-triggered state, a vacuum would arise which would bring the piston back into its rest position. Due to the friction of the O-ring 30, the short-circuiting piston is held securely for transport. The piston only moves when the gas generator receives a sudden impulse.
  • the pressure membrane 24 is also provided with a small bore, which is used only for mounting the piston and is then glued or closed.
  • the short-circuiter 1 consists of a sandwich-like package of current, transverse or connecting rails 2, 4, 6 insulating plates 16, 34 and at least one thin insulating film 31, which acts as a membrane.
  • the lower bore is not conical, but cylindrical and has a clearance fit with the short-circuiting piston, as shown in FIG. 11.
  • the game 64 is a few hundredths of a millimeter, preferably 0.01 to 0.02 mm. Surprisingly, although there is a small air gap during power transmission, 100 kA can flow for half a second. Despite air, there are no arcing when switching.
  • the clearance fit is surprisingly more advantageous than the press fit, in which a deformation occurs.
  • the upper region 65 of the lower bore 33 is funnel-shaped, which improves the triggering process.
  • the joining of the short-circuiting piston, which is realized by the area 65, is more important than a clean punching of the membrane, for example with a rectangular edge.
  • the package of busbars, insulating film 31 and insulating plates is clamped with insulated screws.
  • the insulating collar 36 Through the insulating collar 36, the sleeve length, the insulating film 31 which is larger than the cross rail 6 or is arranged overlapped and the collar 29, air and creepage distances are maintained in accordance with the standards.
  • the gas generator 11 which is held in an encapsulation 12 or pressure housing, is screwed into the insulating plate 16 with an internal thread 38.
  • the short-circuiting piston moves under high pressure between the busbars and short-circuits them, breaking through the insulating film 31.
  • the punched-out part 39 can fall out at an opening on a lower, second insulating plate 34 and as a trigger indicator. This part 39 is provided with a hole 40.
  • FIG. 5 Another embodiment is shown in FIG. 5. This consists of a three-pole short-circuiting device as in the previous example, but with a single gas generator and three packages arranged one above the other Busbars 41, 42, 43 which are provided with bores arranged one above the other, two insulating foils 44, 45 being present.
  • the short-circuiting pin short-circuits all three busbars. Both insulation foils are broken through.
  • thin busbars 46, 47, 48, but without bores are arranged in a packet or sandwich-like manner with insulating films 49, 50 between them, as shown in FIG. 6.
  • the short-circuiting pin punches the entire package from busbars and
  • FIG. 7 shows another arrangement, which is basically the same as the arrangement in FIG. 6, but with strand-like busbars 51, 52, 53 and a short-circuiting bolt which has arrow-shaped contact tips 54 which penetrate and short-circuit the stranded material.
  • the strand is impregnated with a conductive liquid with a high boiling point or a liquid metallic alloy.
  • busbar here also includes the term strand.
  • busbars are arranged in a star shape on one level, of which only two busbars 55, 56 are shown.
  • the short-circuiting pin is arranged in the star point of the busbars without touching them.
  • An insulating film 57 to be pierced is arranged beneath the busbars, which is applied to a reservoir 58 of an electrically or metallically conductive one
  • Liquid is lying. After ignition, the membrane 61 is destroyed, as before, and the short-circuiting piston displaces the liquid into the air gap 60, so that a short circuit arises.
  • the reservoir 58 is realized by lowering a lower insulating plate 59.
  • the bores 32, 33 are centered by two fitting cylinders 61, 62 and a fitting pin 63 connecting both fitting cylinders 61, 62.
  • the membrane or insulating film 31 has a hole 40 for the passage of the dowel pin.
  • the membrane After centering, the membrane is fixed to the conductor rails with a double-sided adhesive film or adhesive pad.
  • the short-circuiting bolt which has a fitting blind hole bore 66 for this purpose, can be precisely centered with the aid of the dowel pin 63 and the fitting cylinder 62.
  • the invention specifies primarily for use as a central protective organ in portable and stationary power distribution systems, both in point distributors, for example main distributors, and in line distributors, for example, rail distributors in low, medium and high voltage technology.
  • the invention can also be used as a decentralized protective device, for example in battery, emergency power, compensation and rail systems.
  • the basic principle is that a gas generator that is activated by a defined ignition current delivers a defined gas volume in a very short time.
  • the space in which the gas volume develops is sufficiently dense and firm that a pressure of up to 900 bar builds up.
  • the pressure is used as a drive for a closing process.
  • the conductors are designed for a short-circuit current of over 100kA over a period of at least 500 ms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

L'invention concerne un court-circuiteur pour un dispositif de protection contre les arcs de lumière parasite, utilisé dans des systèmes de répartition d'énergie électrique. Ce court-circuiteur comprend un générateur de gaz et un élément court-circuiteur entraîné directement par le générateur de gaz et présentant un piston. L'invention vise à améliorer ce court-circuiteur de façon à ce que ledit piston exécute un mouvement de poussée optimal indépendamment des tolérances de fabrication et soit par ailleurs immobilisé pour le transport, le générateur de gaz devant en outre être fixé de manière sûre. A cet effet, le piston est pourvu d'un joint torique (30) servant d'élément d'étanchéité, et le côté supérieur du piston, à l'état non déclenché, est plaqué à fleur contre une membrane à pression (24) de sorte que, lors d'un mouvement du piston à l'état non déclenché, il se produit un vide qui replace le piston dans sa position de repos.
EP98959724A 1997-10-22 1998-10-15 Court-circuiteur, notamment pour dispositif de protection contre les arcs de lumiere parasite, utilise dans des systemes de repartition d'energie electrique Withdrawn EP1040542A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19746564A DE19746564A1 (de) 1997-10-22 1997-10-22 Kurzschließer, insbesondere für eine Störlichtbogen-Schutzvorrichtung zur Verwendung in Anlagen und zur Verteilung elektrischer Energie
DE19746564 1997-10-22
DE19746815 1997-10-23
DE1997146815 DE19746815A1 (de) 1997-10-23 1997-10-23 Kurzschließer, insbesondere für eine Störlichtbogen-Schutzvorrichtung zur Verwendung in Anlagen zur Verteilung elektrischer Energie
PCT/DE1998/003021 WO1999021253A1 (fr) 1997-10-22 1998-10-15 Court-circuiteur, notamment pour dispositif de protection contre les arcs de lumiere parasite, utilise dans des systemes de repartition d'energie electrique

Publications (1)

Publication Number Publication Date
EP1040542A1 true EP1040542A1 (fr) 2000-10-04

Family

ID=26041000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98959724A Withdrawn EP1040542A1 (fr) 1997-10-22 1998-10-15 Court-circuiteur, notamment pour dispositif de protection contre les arcs de lumiere parasite, utilise dans des systemes de repartition d'energie electrique

Country Status (3)

Country Link
EP (1) EP1040542A1 (fr)
AU (1) AU1554499A (fr)
WO (1) WO1999021253A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8534174B2 (en) * 2010-09-27 2013-09-17 Power Tool Institute Pyrotechnic actuator and power cutting tool with safety reaction system having such pyrotechnic actuator
US10332707B2 (en) * 2017-06-29 2019-06-25 Daicel Corporation Actuator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH564866A5 (fr) * 1974-06-13 1975-07-31 Sprecher & Schuh Ag
DE2623816A1 (de) * 1976-05-28 1977-12-08 Calor Emag Elektrizitaets Ag Schnellerdungsvorrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9921253A1 *

Also Published As

Publication number Publication date
WO1999021253A1 (fr) 1999-04-29
AU1554499A (en) 1999-05-10

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