US3304529A - Resistor for high voltage - Google Patents

Resistor for high voltage Download PDF

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Publication number
US3304529A
US3304529A US436532A US43653265A US3304529A US 3304529 A US3304529 A US 3304529A US 436532 A US436532 A US 436532A US 43653265 A US43653265 A US 43653265A US 3304529 A US3304529 A US 3304529A
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US
United States
Prior art keywords
resistor
windings
adjacent
end portions
another
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Expired - Lifetime
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US436532A
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English (en)
Inventor
Forwald Haakon
Savolainen Lauri
Berg Samuel
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ABB Norden Holding AB
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ASEA AB
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Filing date
Publication date
Priority claimed from SE1030/65A external-priority patent/SE309626B/xx
Application filed by ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3304529A publication Critical patent/US3304529A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01H33/16—Impedances connected with contacts
    • H01H33/165—Details concerning the impedances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/16—Resistor networks not otherwise provided for
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors

Definitions

  • This invention relates to a resistor construction, and more specifically relates to a damping resistor for use with high voltage circuit breakers.
  • Resistors are commonly connected in parallel with the main interrupting gap of a high voltage circuit breaker in order to control the recovery voltage appearing across the high voltage circuit breaker contacts when these contacts separate. Thus, these resistors are exposed to extremely high impulse currents for a very short time.
  • the loading time of these resistors is so short that substantially all ot the energy is stored as heat in the resistor body which thereafter is slowly cooled.
  • the overall size of the resistor is relatively large, since for a given power and given loading time, the temperature to which the resistor material is heated is inversely proportional to the weight of the resistor material. As a resistor is made lighter and smaller, the temeprature to which it rises during operation is increased to some limiting factor dependent upon the thermal capability of the insulation material.
  • the principle of the present invention is to prov-ide a novel construction for damping resistors for use with high voltage circuit breakers which provides an extremely high concentration of resistor material along with high electrical strength, whereby a relatively large resistor rnass having suitable eiective long length is provided giving the device high thermal inertia and compactness.
  • the novel invention provides a simplied method for the manufacture and assembly of such resistors.
  • the temperature rise is low so that conventional insulation methods and materials can be used.
  • the resistor is formed of a plurality of disk coils (spirally wound discs) having a generally con-ical shape which are separated from one another by conically arranged insulation disks.
  • the adjacent coils are then alternately connected to one another at their interiors and at their exteriors.
  • the recovery voltage across the breaker terminals after the breaking can have a frequency of some tens of kilocycles. If the resistor is to function effectively at these relatively high frequencies it is particularly important that it has a small inductance.
  • a resistor with a particularly small inductance can be obtained by making the coils substantially alike and arranging them in the staple with the windings in the same direction. As the current in every other coil is conducted from the inner layer to the outer layer and in the alternate coils from the outer to the inner layer, the magnetic fields generated by adjacent coils will be in opposing directions, thereby resulting in a comparatively low inductance.
  • each resistor winding of vseveral partial conductors lying beside each other so-called partial discs, so that the adjoining partial discs have opposite winding directions.
  • each resistor winding there would suitably be an even number of partial discs.
  • All the initial ends of the partial conductors in a resistor winding are connected suitably to a common inner contact ring, which for every other resistor winding is provided with axially projecting resilient tongues which 'are intended to tit in a bush-like inner contact ring belonging to an adjoining resistor winding.
  • the inner galvanic connection between adjacent windings can thereby ⁇ be made in a particularly simple way.
  • a primary object of this invention is to provide a high voltage resistor structure formed of spirally wound disks of resistance wire.
  • Another object of this linvention is to provide a novel damping resistor for high voltage circuit breakers which provides a relatively low temperature rise with a relatively small resistor volume.
  • Another object of this invention is to provide a novel alternating arrangement of insulation disks and spirally wound resistance wire disks for the formation of a resistor having high thermal inertia.
  • Another object of this invention is to provide a novel damping resistor with a particularly small inductance.
  • FIGURE l is a cross-sectional view of a resistor constructed in accordance with the invention.
  • FIGURE 2 is a partial, exploded view in cross-section of the arrangement of FIGURE l.
  • FIGURE 3 is a top view of FIGURE l.
  • FIGURE 4 is a partial, top plan View of a section of the resistance winding of FIGURES l and 2.
  • FIGURE 5 is a central, cross-sectional view of a resistor coil composed of four disk elements.
  • FIGURE 6 shows a larger scale the right part of the coil according to FIGURE 5 with the current directions indicated.
  • FIGURE 7 is a cross-sectional View of a resistor coil similar to FIGURE 5, but having only two disk elements.
  • the resistor illustrated therein is formed of a plurality of identically spirally wound coils of a suitable resistance wire, illustrated as coils 10 to 23.
  • coils 10 to 23 are identical to one another, and are formed to be slightly conical or dished to define alternate pairs of disks which are dished inwardly toward one another.
  • the exterior ends of adjacent spirals are similarly connected together, as illustrated in FIGURE 2 by the line 25, the terminating ends of disks 11-12, 13-14, 546, 1748, 19-20 and 21-22 being similarly electrically connected together.
  • the terminals of the device are then defined by the outer terminating ends of disks Iii and 23.
  • each of the spiral resistance windings 10 to 23 are formed of a plurality of turns and are of identical construction.
  • the resistance wire may be coated with a suitable enamel insulation in the standard manner, or, for higher ternperatures, can be coated with a silicon lacquer or can have interposed between adjacent turns a glass fiber insulation strip.
  • a continuous strip 26 of glass fiber can be interposed between the continuous strip 27 of insulation wire deiining, for example, a portion of the winding 10.
  • the novel arrangement is used of outwardly tlared insulation disks 28 to 34- and inwardly flared alternate disks 35 to 40.
  • the disks 28 to 40 may be of any suitable insulation material, and could, for example, be machined ber bodies or cast epoxy bodies.
  • a central insulation rod 43 is then secured to the end insulation members 41 and 42 in any desired manner as by being directly secured to one disk and threadably secured to the other disk so as to clamp the complete assembly together.
  • FIGURE a resistor coil is shown in which the resistor material is wound so that a slightly conical resistor winding 51 is formed.
  • the resistor winding 51 is wound of four insulated partial conductors, which form four disk elements 52 to 55. Adjacent disk elements, for example 52 and 53, have opposite winding directions and all the initial ends of the disk elements 52 to 55 in the resistor winding 51 are connected to a common inner contact ring 56 and all the linal ends t0 an outer outlet ring 57. From FIGURE 6 the current direction in the disk elements is evident. The crosses and points represent that the current enters and comes out of the plane of the paper.
  • the inner contact ring 56 is provided with a number of axially projecting resilient tongues 58, Iwhich are intended to lit in a bush-like inner contact ring 59 of the type shown in FIGURE 7.
  • this ligure shows a resistor winding 60 of a similar type to that shown in FIGURE 5, but with only two disk elements 61 and 62.
  • the different disk elements in a resistor winding have equal numbers of winding t-urns and consequently have equal resistance values, so that the total current through the winding is divided into similarly large partial currents in each partial conductor.
  • a winding manufactured in this 'way has particularly low inductance and the proposed arrangement produces ⁇ the further advantage that the skin effect is of less importance.
  • the inductance as well as the skin eliect decreases with the increased number of partial conductors.
  • a high voltage resistor comprising, in combination: a plurality of coaxial spirally wound windings of resistor wire wound in the same direction, means supporting said windings in spaced relation to each other, said resistor windings having internal wire end portions and external wire end portions at the interior and.
  • first alternate pairs of adjacent resistor windings having their said internal wire end portions electrically connected to one another, second alternate pairs of adjacent resistor windings having their said external wire end portions electrically connected to one another; alternate adjacent pairs of said resistor windings being dished toward and away from one another, respectively, said supporting means comprising a plurality of radially tapering coaxial insulation discs each interposed between and lling the spaces between respective adjacent windings of said spaced resistor windings.
  • a first and second end insulation disc positioned at opposite ends of said resistor, and a central clamping shaft of insulating material extending between and secured to said lirst and second end insulation discs; said plurality of resistor windings and said plurality of said insulation discs having aligned central openings therein; said central clamping shaft extending through said aligned openings and forcing said end insulation discs toward one another to clamp said resistor windings and insulation discs together.
  • each of said resistor windings including an insulation tape interposed between adjacent convolutions of said winding.
  • each resistor winding comprising a plurality of adjacent partial conductors, said adjacent partial conductors being alternately wound in opposite directions.
  • an inner contact ring having axially projecting contact tongues; said contact tongues maintaining electrical contact between the inner ends of said rst alternate pairs of adjacent resistor windings, all said partial conductors of each said resistor winding being connected to said common inner contact ring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Details Of Resistors (AREA)
  • General Induction Heating (AREA)
  • Adjustable Resistors (AREA)
US436532A 1964-03-12 1965-03-02 Resistor for high voltage Expired - Lifetime US3304529A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE3064/64A SE301182B (forum.php) 1964-03-12 1964-03-12
SE1030/65A SE309626B (forum.php) 1965-01-27 1965-01-27

Publications (1)

Publication Number Publication Date
US3304529A true US3304529A (en) 1967-02-14

Family

ID=26654206

Family Applications (1)

Application Number Title Priority Date Filing Date
US436532A Expired - Lifetime US3304529A (en) 1964-03-12 1965-03-02 Resistor for high voltage

Country Status (6)

Country Link
US (1) US3304529A (forum.php)
CH (1) CH431671A (forum.php)
DE (1) DE1465148A1 (forum.php)
FR (1) FR1427375A (forum.php)
GB (1) GB1094524A (forum.php)
SE (1) SE301182B (forum.php)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447118A (en) * 1966-08-16 1969-05-27 Westinghouse Electric Corp Stacking module for flat packaged electrical devices
US3845358A (en) * 1973-06-29 1974-10-29 Gen Electric Integrated polycrystalline varistor surge protective device for high frequency applications
US4153921A (en) * 1978-02-06 1979-05-08 General Electric Company Thermally stabilized metal oxide varistors
EP0041470A3 (en) * 1980-05-30 1983-05-18 Siemens Aktiengesellschaft Resistor for high-voltage equipment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017088922A1 (de) * 2015-11-26 2017-06-01 Siemens Aktiengesellschaft Anordnung mit einem hochspannungswiderstand zum vorladen von kondensatoren eines stromrichters

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1275151A (en) * 1916-12-04 1918-08-06 Gen Electric Protective means for electrical apparatus.
US1816838A (en) * 1929-10-02 1931-08-04 Frazer W Gay Protective system
US1887461A (en) * 1928-12-06 1932-11-08 Ferranti Inc Lightning or surge absorber
US2233939A (en) * 1937-10-29 1941-03-04 Ferranti Electric Inc Electrical surge absorber
US3096496A (en) * 1961-05-11 1963-07-02 Mc Graw Edison Co Overvoltage protective device
US3227983A (en) * 1963-08-07 1966-01-04 Air Reduction Stacked resistor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1275151A (en) * 1916-12-04 1918-08-06 Gen Electric Protective means for electrical apparatus.
US1887461A (en) * 1928-12-06 1932-11-08 Ferranti Inc Lightning or surge absorber
US1816838A (en) * 1929-10-02 1931-08-04 Frazer W Gay Protective system
US2233939A (en) * 1937-10-29 1941-03-04 Ferranti Electric Inc Electrical surge absorber
US3096496A (en) * 1961-05-11 1963-07-02 Mc Graw Edison Co Overvoltage protective device
US3227983A (en) * 1963-08-07 1966-01-04 Air Reduction Stacked resistor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447118A (en) * 1966-08-16 1969-05-27 Westinghouse Electric Corp Stacking module for flat packaged electrical devices
US3845358A (en) * 1973-06-29 1974-10-29 Gen Electric Integrated polycrystalline varistor surge protective device for high frequency applications
US4153921A (en) * 1978-02-06 1979-05-08 General Electric Company Thermally stabilized metal oxide varistors
EP0041470A3 (en) * 1980-05-30 1983-05-18 Siemens Aktiengesellschaft Resistor for high-voltage equipment

Also Published As

Publication number Publication date
GB1094524A (en) 1967-12-13
SE301182B (forum.php) 1968-05-27
CH431671A (de) 1967-03-15
DE1465148A1 (de) 1969-04-24
FR1427375A (fr) 1966-02-04

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