US3331930A - Three-phase load disconnecting switch - Google Patents

Three-phase load disconnecting switch Download PDF

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Publication number
US3331930A
US3331930A US427007A US42700765A US3331930A US 3331930 A US3331930 A US 3331930A US 427007 A US427007 A US 427007A US 42700765 A US42700765 A US 42700765A US 3331930 A US3331930 A US 3331930A
Authority
US
United States
Prior art keywords
switch
cylinder
piston
caps
bell
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.)
Expired - Lifetime
Application number
US427007A
Other languages
English (en)
Inventor
Clason Jan Christiaan
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.)
Hazemeijer BV
Original Assignee
Hazemeijer BV
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 DE1964N0025643 external-priority patent/DE1243750B/de
Application filed by Hazemeijer BV filed Critical Hazemeijer BV
Application granted granted Critical
Publication of US3331930A publication Critical patent/US3331930A/en
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
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/14—Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch
    • H01H31/24—Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch with rectilinearly-movable bridging contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • H01H3/605—Mechanical arrangements for preventing or damping vibration or shock making use of a fluid damper
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/02—Energy stored by the attraction or repulsion of magnetic parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/08—Arrangements to facilitate replacement of a switch, e.g. cartridge housing
    • H01H9/085—Arrangements to facilitate replacement of a switch, e.g. cartridge housing contact separation effected by removing contact carrying element

Definitions

  • the invention relates to a three-phase load disconnecting switch, comprising for each phase two fixed contacts parallel to each other as well as a connector link adapted to be moved in the longitudinal direction normal to these two fixed contacts.
  • Each of these connectors is enclosed by a switch cap or cover.
  • the invention furnishes a load disconnecting switch of the type mentioned in the preamble, in which a plane perpendicular to all the fixed contacts is intersected by the longitudinal axes of these fixed contacts in points which form the vertices of an equilateral triangle.
  • the switch is constructed in such a way that the impact of the cylinder against the magnet system at the end of the disconnecting movement is'considerably weakened. Also, it is constructed so that any damage to the respective parts of the switch is prevented because the piston is provided round the mouth of the inner tube with a projecting flat edge.
  • a damping device which comprises a "ice plate fitting loosely in the cylinder and elastically supported in the direction of movement of said cylinder. This plate is provided with a narrow bore, located within the fiat edge of the piston, and is flat on the side turned towards the piston or has a suitable bearing surface to engage and mate with the piston.
  • FIG. 1 shows a top view of a number of important parts of the switch, with one switch cap for each phase.
  • FIG. 3 shows a top view of a switch cap enclosing the connector of one phase
  • FIGS. 7 and 8 show details of this connection.
  • FIGS. 1, 2a, 2b, 2c, 3, 4 and 5 The scale of FIGS. 1, 2a, 2b, 2c, 3, 4 and 5 is the same, while FIGS. 6-11 are on an enlarged scale.
  • FIGS. 1 and 2a a housing base is designated by 10, on which base part is located the housing shell 11 shown in section in FIG. 2a.
  • This shell encloses the fixed contact pairs of all the phases, which, however, are not shown in FIG. 2a.
  • FIG. 2a only shows a section of a collar 12, which encloses the fixed contacts of one phase.
  • FIG. 2a illustrates the movable parts of the switch shown when withdrawn.
  • the movable parts of the switch inside the bell 13 consists of the switch cap 14 for the connector, shown in section, which belongs to the fixed contact pairlocated within the collar 12.
  • FIG. 1 a projection 15 is present, which serves to fasten the connector.
  • the outer contour of the switch cap 14 is also shown in FIG. 1 by means of the lines 14a.
  • the two internal projections 15 of this switch cap are designated by means of the dotted circles 15a.
  • FIG. 2a inside the bell 13 another switch cap 16 is partly visible.
  • the outer contour 16a is shown in FIG. 1.
  • a tube 17 concentric relative to the axis of the bell.
  • the interior 18 of this tube is accessible via a supply pipe 19 in a top member 20a, said top member being secured to the top of the bell 13 and at the same time supporting the tube 17.
  • This supply pipe 19 is also visible in FIG. 1.
  • the tube 17 is surrounded by a further tube 20 concentric therewith, while the space between these two tubes ends in a supply pipe 21 in the top member 20a, which is also visible in FIG. 1.
  • At the lower end the tube 17, its interior 18 projects through a piston 22, so that compressed air can be fed through the supply pipe 19 and through the interior 18 of the inner tube 17 to the chamber beneath the piston 22.
  • the outer tube 20 extends only to the piston 22; at its lower end, however, it is provided with a ring of holes 23, so that compressed air can be fed through the supply pipe 21 and via the space between the tubes 17 and 20 to the chamber above the piston 22.
  • a cylinder 24 closed at the bottom, which cylinder is sealed at the top by a top plate 25a. Movement of the cylinder, which can be effected in the downward direction by the feeding of compressed airthrough the supply pipe 19 and in the upward direction by the feeding of compressed air through the supply pipe 21, causes the switch to be closed and opened respectively, i.e. the switch caps containing the connectors are moved jointly downwards for closing the switch and jointly upwards for opening the switch.
  • the switch cap has a height approximately one half that of the switch cap.
  • the member 26 is hollow, for simplifying its production in conjunction with the switch cap, which consists of a high-grade synthetic insulating material. Now the three switch caps are arranged-in such a way that each cylindrical member 26 of one switch cap is insertedinto the cylindrical sleeve 28 of the adjacent switch cap, so that finally the three switch caps form a firmly interlocked coherent unit.
  • the cylinder 24 at its lower end on the outside carries radial projections 34 at three points 120 apart.
  • the cylinder has a flange 33 with recesses facing the fixed projections 34.
  • a clamping ring 36 of which a section is shown in FIG. 7 and a top view in FIG. 8, is forced by means of a lock ring 38 against the bottom of the cylinder 24, so that three hooked projections of the clamping ring 36 rest against the underside of the ribs 30 and exactly face the fixed projections 34.-The dimensions of the said recesses in the flange 33 are such that the hooked projections 37 can be freely stuck through them and prevent rotation of the clamping ring.
  • the three switch caps are rigidly coupled with each other, and also as shown in FIGS. 6 to 8 the unit consisting of these switch caps is also rigidly coupled by means of their ribs 30 with the cylinder 24, so that upon an upward and downward movement of the cylinder 24 in FIG. 2a all the separate connectors are withdrawnfrom the corresponding fixed contacts and the connectors are pushed on the fixed contacts respectively. It is thus possible to close and open the three-phase switch respectively by feeding compressed air to the supply pipes 19 and 21.
  • the movable part of the switch consisting of the cylinder and the switch caps with connectors, is also held magnetically, as will be explained more fully by reference to FIG. 2a.
  • a magnet system 39 isfitted so that the top plate 25a consisting of ferromagnetic material may be held magnetically in place.
  • the magnetic attraction which holds the movable .part of the switch in the opened position, must be overcomewhen the switch is to be closed, andin the closed position a.
  • ferromagnetic annular disc 41 fixed by the clamping ring 38 to the underside of the cylinder 24 is held by a similar magnet system 42, so that also in the closed position an additional force supplied by the magnet system acts on the switch contacts. This magnetic force must be overcome when the switch is to be opened.

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Vibration Prevention Devices (AREA)
US427007A 1964-01-21 1965-01-21 Three-phase load disconnecting switch Expired - Lifetime US3331930A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEN24336A DE1223015B (de) 1964-01-21 1964-01-21 Dreiphasiger Lasttrennschalter
DEN0024789 1964-04-13
DE1964N0025643 DE1243750B (de) 1964-10-05 1964-10-05 Dreiphasiger Lasttrennschalter

Publications (1)

Publication Number Publication Date
US3331930A true US3331930A (en) 1967-07-18

Family

ID=27211787

Family Applications (1)

Application Number Title Priority Date Filing Date
US427007A Expired - Lifetime US3331930A (en) 1964-01-21 1965-01-21 Three-phase load disconnecting switch

Country Status (8)

Country Link
US (1) US3331930A (nl)
BE (1) BE658477A (nl)
CH (1) CH441468A (nl)
DE (1) DE1223015B (nl)
FR (1) FR1421157A (nl)
GB (1) GB1099901A (nl)
NL (1) NL143066B (nl)
SE (1) SE314731B (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578924A (en) * 1968-04-23 1971-05-18 Coq Utrecht Nv Metal clad switch gear for high voltages

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2328313A1 (fr) * 1975-10-13 1977-05-13 Cem Comp Electro Mec Ensemble interrupteur et sectionneur de terre, notamment pour cellule prefabriquee d'un poste de distribution publique a moyenne tension.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2190402A (en) * 1938-01-06 1940-02-13 Stone J & Co Ltd Electrical control system
US2683198A (en) * 1950-10-30 1954-07-06 Hart Mfg Co Electromagnetic relay
US2785241A (en) * 1952-11-14 1957-03-12 British Thomson Houston Co Ltd Electric circuit controllers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195746A (en) * 1937-07-22 1940-04-02 Gen Motors Corp Switch
DE1015891B (de) * 1953-03-11 1957-09-19 Fritz Driescher Schubtrennschalter fuer hohe Stromstaerken
NL189734C (nl) * 1954-08-05 Kawai Musical Instr Mfg Co Elektronisch muziekinstrument.
DE1096449B (de) * 1958-08-12 1961-01-05 Licentia Gmbh Mehrpoliger Brueckentrennschalter kleiner Abmessungen
DE1160064B (de) * 1962-03-21 1963-12-27 Thermostat & Schaltgeraetebau Temperaturabhaengige elektrische Schaltvorrichtung mit einem Schmelzgliedfuehler

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2190402A (en) * 1938-01-06 1940-02-13 Stone J & Co Ltd Electrical control system
US2683198A (en) * 1950-10-30 1954-07-06 Hart Mfg Co Electromagnetic relay
US2785241A (en) * 1952-11-14 1957-03-12 British Thomson Houston Co Ltd Electric circuit controllers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578924A (en) * 1968-04-23 1971-05-18 Coq Utrecht Nv Metal clad switch gear for high voltages

Also Published As

Publication number Publication date
BE658477A (nl) 1965-05-17
NL143066B (nl) 1974-08-15
SE314731B (nl) 1969-09-15
NL6500779A (nl) 1965-07-22
FR1421157A (fr) 1965-12-10
GB1099901A (en) 1968-01-17
DE1223015B (de) 1966-08-18
CH441468A (fr) 1967-08-15

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