EP0434463A2 - Hochspannungsrelais - Google Patents

Hochspannungsrelais Download PDF

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Publication number
EP0434463A2
EP0434463A2 EP90314175A EP90314175A EP0434463A2 EP 0434463 A2 EP0434463 A2 EP 0434463A2 EP 90314175 A EP90314175 A EP 90314175A EP 90314175 A EP90314175 A EP 90314175A EP 0434463 A2 EP0434463 A2 EP 0434463A2
Authority
EP
European Patent Office
Prior art keywords
arrangement
housing
contacts
movable
electrically insulating
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
EP90314175A
Other languages
English (en)
French (fr)
Other versions
EP0434463B1 (de
EP0434463A3 (en
Inventor
John Richard Will Rees
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.)
Teledyne UK Ltd
Original Assignee
EEV 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 EEV Ltd filed Critical EEV Ltd
Publication of EP0434463A2 publication Critical patent/EP0434463A2/de
Publication of EP0434463A3 publication Critical patent/EP0434463A3/en
Application granted granted Critical
Publication of EP0434463B1 publication Critical patent/EP0434463B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/29—Relays having armature, contacts, and operating coil within a sealed casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/643—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rotating or pivoting movement
    • H01H50/644—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rotating or pivoting movement having more than one rotating or pivoting part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/023—Details concerning sealing, e.g. sealing casing with resin
    • H01H2050/025—Details concerning sealing, e.g. sealing casing with resin containing inert or dielectric gasses, e.g. SF6, for arc prevention or arc extinction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/026—Details concerning isolation between driving and switching circuit

Definitions

  • This invention relates to relay arrangements and more particularly to relay arrangements which are capable of switching large energies but which are inexpensive to manufacture.
  • One type of relay used at present includes contacts which are housed within an envelope of glass and metal which also contains an insulating gas at a relatively high pressure, typically in the region of three atmospheres.
  • Such an envelope is expensive to fabricate because of the difficulties in providing good sealing between the glass and metal parts, particularly where electrical leads are taken out through the glass wall and because glass tends to be difficult to work.
  • the present invention arose from an attempt to design a relay arrangement which is particularly suitable for use with medical defibrillators and which is relatively cheap to manufacture.
  • a relay arrangement comprising fixed and movable contacts contained within a housing which is of plastic material and filled with electrically insulating gas.
  • plastic material for the housing, the arrangement may be fabricated relatively cheaply, preferably using moulding techniques. Furthermore, the problems caused when materials having different coefficients of expansion are used in the envelope are reduced or avoided.
  • the relay arrangement must be able to hold off in the region of 5.5 kV for use in defibrillator equipment and be capable of switching 500 J.
  • the gas pressure within the housing is approximately one atmosphere, reducing stresses on the housing walls caused by differences between internal and external pressures.
  • the insulating gas used must be such that, unlike air, say, it does not readily conduct and if it has by-products then they must also be non-conductive.
  • the particular plastic material used depends on its properties when it comes into contact with the insulating gas.
  • the movable contact is pivoted at two pivot points. This enables a large amount of movement to be produced in a relatively short time. Thus, it is possible to space the movable and fixed contacts at fairly large distances apart to reduce the tendency for arcing to occur without significantly impairing the performance of the relay.
  • two sets of fixed and movable contacts are included and a member of electrically insulating material is located between the two sets, thus giving additional shielding against arcing.
  • the member is an actuator for moving the movable contacts, this being a particularly convenient configuration.
  • a relay arrangement used in medical defibrillator equipment includes two sets of contacts generally indicated at 1 and 2 respectively.
  • Each set 1 and 2 of contacts includes two fixed contacts 3, 4, 5 and 6 and a movable contact 7 and 8.
  • the sets 1 and 2 of contacts are located within a housing 9 which is of a plastic material and is cuboid, having rectangular faces.
  • the housing 9 is filled with an insulating gas, at a pressure of approximately one atmosphere.
  • the contacts 3 and 4 of the first set 1 are mounted on a common post, the electrical connection to the lower contact 4 being made by a wire 10 and that to the upper contact 3 by a wire 11. Insulating material 12 is located between the contacts 3 and 4 and the wires 10 and 11 are also insulated.
  • the movable contact 7 is pivoted at two points 13 and 14.
  • the pivot point 14 at the end of the movable contact 7 remote from the fixed contacts 3 and 4 consists of a slot in a metal portion 15 of a post 16 through which the contact 7 passes.
  • a cylindrical rod 17, attached to an actuator member 18 is located against the contact 7, the contact 7 including a curved part to accommodate the rod 17.
  • the second set 2 of contacts is substantially identical in configuration to the first set.
  • the part of the actuator member 18 between the two sets is of electrically insulating material.
  • the housing 9 also includes a coil 19 which provides means for electromagnetically moving the actuator 18. Normally, the actuator 18 is held in the position shown in Figures 1 and 2, by a spring 20, the movable contacts 7 and 8 being in contact with the upper fixed contacts 3 and 5. When the coil 19 is energised, the actuating member 18 is moved downwardly and the movable contacts 7 and 8 come into contact with the lower fixed contacts 4 and 6.
  • the actuator member 18 comprises a horizontal part 21 as shown and a substantially vertical part 22.
  • the vertical part 22 is arranged to extend sufficiently far that, when the member 18 is in its upper most position, the lower fixed contacts 4 and 6 are electrically shielded by it.
  • the base 23 of the housing 9 includes moulded portions 24 through which electrical connectors are taken. During manufacture of the relay arrangement, the coil 19 and contacts 1 and 2 are assembled on the base 23 and then the remainder of the housing sealed to the base 24. The housing 9 is then evacuated via a vent hole and the insulating gas pumped in.
  • a circuit arrangement which includes the relay arrangement of Figures 1 and 2 comprises a high voltage d.c. supply 25 connected across a capacitor 26 via the movable contacts 7 and 8 of the relay arrangement.
  • the capacitor is also connected to paddles 27 and 28 which, in use, are held in contact with a patient who is being defibrillated.
  • the high voltage d.c. supply 25 is switched on to charge the capacitor 26, the movable contacts 7 and 8 being in the position shown, when the required amounts of energy is stored, the operator triggers the arrangement and a voltage pulse is applied to the relay coil 19. This activates the relay so that the capacitor 26 is discharged via an inductor 29 across the paddles 27 and 28.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electrotherapy Devices (AREA)
EP19900314175 1989-12-22 1990-12-21 Hochspannungsrelais Expired - Lifetime EP0434463B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898929126A GB8929126D0 (en) 1989-12-22 1989-12-22 Relay arrangements
GB8929126 1989-12-22

Publications (3)

Publication Number Publication Date
EP0434463A2 true EP0434463A2 (de) 1991-06-26
EP0434463A3 EP0434463A3 (en) 1992-07-01
EP0434463B1 EP0434463B1 (de) 1996-10-16

Family

ID=10668462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900314175 Expired - Lifetime EP0434463B1 (de) 1989-12-22 1990-12-21 Hochspannungsrelais

Country Status (3)

Country Link
EP (1) EP0434463B1 (de)
DE (1) DE69028906D1 (de)
GB (2) GB8929126D0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4127533A1 (de) * 1991-08-20 1993-02-25 Siemens Ag Implantierbares medizinisches geraet und verfahren zu seiner herstellung
EP0574058A3 (de) * 1992-06-11 1994-01-05 Alcatel STR AG Relais
ES2076104A2 (es) * 1993-08-23 1995-10-16 Releco Sa Sistema de montaje de contactos para reles electromagneticos.
EP0982746A3 (de) * 1998-08-26 2001-09-12 Matsushita Electric Works, Ltd. Einpoliger Schalteranordnung mit Relais

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9111577U1 (de) * 1991-09-17 1993-01-28 EURO-Matsushita Electric Works AG, 8150 Holzkirchen Elektromagnetisches Relais

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129304A (en) * 1960-09-23 1964-04-14 Cutler Hammer Inc Reversible contact molded frame relay
DD125526A3 (de) * 1975-09-19 1977-04-27
US4039984A (en) * 1976-03-11 1977-08-02 Torr Laboratories, Inc. Pressurized relay assembly
US4168480A (en) * 1978-02-13 1979-09-18 Torr Laboratories, Inc. Relay assembly
JPS5539154A (en) * 1978-09-12 1980-03-18 Matsushita Electric Works Ltd Method of fabricating gassfilled electric switch
NL7809766A (nl) * 1978-09-27 1980-03-31 Philips Nv Hartdefibrillator.
DE3308791C2 (de) * 1983-03-12 1986-08-21 Standard Elektrik Lorenz Ag, 7000 Stuttgart Verfahren zur Herstellung eines dichten elektromagnetischen Relais
DE3323922A1 (de) * 1983-07-02 1985-01-03 Standard Elektrik Lorenz Ag, 7000 Stuttgart Waschdichtes elektromagnetisches relais

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4127533A1 (de) * 1991-08-20 1993-02-25 Siemens Ag Implantierbares medizinisches geraet und verfahren zu seiner herstellung
US5344432A (en) * 1991-08-20 1994-09-06 Siemens Aktiengesellschaft Implantable medical device and method for the manufacture thereof
EP0574058A3 (de) * 1992-06-11 1994-01-05 Alcatel STR AG Relais
US5554963A (en) * 1992-06-11 1996-09-10 Alcatel Str Ag Gas-filled plastic enclosed relay
ES2076104A2 (es) * 1993-08-23 1995-10-16 Releco Sa Sistema de montaje de contactos para reles electromagneticos.
EP0982746A3 (de) * 1998-08-26 2001-09-12 Matsushita Electric Works, Ltd. Einpoliger Schalteranordnung mit Relais

Also Published As

Publication number Publication date
GB9027801D0 (en) 1991-02-13
DE69028906D1 (de) 1996-11-21
EP0434463B1 (de) 1996-10-16
GB2239354B (en) 1994-08-31
EP0434463A3 (en) 1992-07-01
GB2239354A (en) 1991-06-26
GB8929126D0 (en) 1990-02-28

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