US2928922A - Metal clad switch-gear - Google Patents

Metal clad switch-gear Download PDF

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Publication number
US2928922A
US2928922A US725708A US72570858A US2928922A US 2928922 A US2928922 A US 2928922A US 725708 A US725708 A US 725708A US 72570858 A US72570858 A US 72570858A US 2928922 A US2928922 A US 2928922A
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US
United States
Prior art keywords
gear
contact
casing
switch
switching
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
US725708A
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English (en)
Inventor
Nijland Hendrik A Hidde
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COQ NV
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COQ NV
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Filing date
Publication date
Application filed by COQ NV filed Critical COQ NV
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Publication of US2928922A publication Critical patent/US2928922A/en
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Classifications

    • 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
    • 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
    • H02G5/06—Totally-enclosed installations, e.g. in metal casings
    • H02G5/061—Tubular casings

Definitions

  • Therinvention relates to metalclad switclkgear for high voltages, comprising a plurality of. switching units, at least one switch contained in eachunit, bus-bars inter.- connecting said switching units, a stationary earthed metal envelope containing insulating material and surrounding all conductors of the switch gear, which, in operation are under. tension, leading-in conductors insulatedly passed through the wall of said envelope, stationary terminal contacts connected to said leading-in conductors, stationary terminal contacts connected to the.
  • bus-bars sets of 'cooperating fixed and movable switching contacts, connecting contacts directly electrically connected to the fixed switching contacts, each set of cooperating switching contacts and the connecting contacts connected thereto-constituting a complete switching element, said connecting contacts cooperating with said terminal contacts and thereby permitting the switching elements to be inserted into and-removed from the envelope when the terminal contacts are under tension.
  • Switch-gear and switches for such switch-gear of the kind referred to are already known in many arrangements. Reference is made to the Dutch patent specifications Nos. 47,529 and 67,638 and published Dutch patent application No. 88,800.
  • the switching contacts are accommodated in switching chambers surrounded by insulating walls and provided within earthed metal casings filled with an insulating fluid.
  • the fixed switching contacts of said switches are detachably connected with leading-in conductors passed through the walls of said casings and are used for the connection to busbars, other parts of the switch-gear or cables of the power network.
  • the bus-bars of'said switch-gear are accommodated within individual metal clad chambers.
  • the invention has for its object to provide metal clad switch-gear of which the construction is considerably simplified and requires less space than switch-gear of known construction. It consists in that the metal envelope of all switching units is formed as a common stationary casing and both the switches and the bus-bars are accommodated in said casing.
  • the construction according to the invention has the advantage that it requires less expensive leading-in insulators, the additional advantage of which is that, when insulating liquid is used, the risk of leakage is smaller. Moreover, the switch-gear may be made more compact and both material and labor are saved. Finally the assembling of the switch-gear is simplified, since the construction thereof is such, that big arts thereof can be completed and assembled before they are placed into the metal casing.
  • fixed tubes of insulating material may be mounted within the casing, said tubes surrounding the switching elements and supporting on their inner surface the terminal contacts and on their outer surface the bus-bars.
  • Said insulating tubes have a double function, viz. they act as insulating screens and ice as supporting insulators for the bus-bars and the terminal contacts.
  • Said tubes may extend throughout the entire height of the metal casing and their inner space may be separated thereby from the surrounding insulating fluid.
  • the tubes may also terminate within the metal case, so that they become'filled with the surrounding insulating fluid.
  • the loss of space due to the provision'of the leadingin conductors may be reduced, when said conductors and the bus-bars are mounted on the same side of the switching elements.
  • the metal envelope of the switching units may advantageously be shaped as one single oblong rectangular through having plane vertical walls, through one of the long walls of which the leading-in conductors are passed.
  • Said trough may be provided with cover plates for closing it on the top and the switching elementsmay be suspended from and the driving mechanism for the movable switching contacts may be mounted on said cover plates.
  • Fig. l a vertical sectional view of'switch-gear. according to the invention.
  • Fig. 2 a cross-sectional view taken on line II-II in Fig. l and Fig. 3 partly'a sectional view and partly an elevational view of switch-gear as-shown in Figs. 1 and 2 completed with a compartment provided'with fuses.
  • an oblong rectangular earthed metal casing or trough is designated by 1.
  • each phase comprises a switching element suspended from a cover plate 2, on which the driving mechanisms 3 for the movable switching contacts of said switches are positioned.
  • Each switching element consists of a movable switching rod 4, a fixed switching contact 5 permanently contacting said rod and a fixed switching contact 6 cooperating with the switching rod 4.
  • the switching contacts 5 and 6 are held at a distance from one another by means of a tube 7 of insulating material and they are suspended from the coverplate 2 by means of an insulating tube 8.
  • the fixed switching contact 5 forms a unit with a metal contact ring 9 to which outward projecting resilient connecting contacts 10 are secured. Said connecting contacts cooperate with a ringshaped terminal contact 11, connected to a connecting conductor 12, which is insulatedly passed through a vertical wall of the casing 1 by means of leading-in insulators 13. Directly attached to the fixed switching contact 6 1s a bushing contact 14, which engages a rod-shaped counter-contact 15.
  • the terminal contact 11 and the countercontact 15 are supported by a tube 16 of insulating material, which is placed'on the bottom of the casing 1 and surrounds the switching element.
  • the counter-contact 15 is supported by a terminal member 17 passed through a hole in the wall of the tube 16 and the portion of said terminal member projecting outwards from said tube supports a bar 18 of the three-phase bus-bar system 18, 19, 20.
  • the bus-bars 18, 19, 26 are accommodated in the casing 1, in which also the switches are placed. Cables of the outer power net work may be connected to the leading-in conductors 12. These conductors may also lead to other compartments of the switch-gear.
  • the tube 16 may extend to an intermediate plate 21, so that the space within said tube is separated from the space surrounding said tube and for instance containing insulating liquid. However, in many cases it is not necessary to use such long tubes 16.
  • the switches accommodated together with the bus-bars in one and the same casing 1 in the manner shown in Fig. l are connected to fuses 23 positioned within a second metal casing 22.
  • Said fuses are detachably mounted within an insulating tube 24 extending throughout the entire height of the casing 22.
  • the electric connection is carried out by means of cooperating contact rings 25, 26 and 27, 28.
  • the contact ring 27 is connected by means of a conductor 29 to the conductor of a leading-in insulator 3t) terminating outside the casing 22 into a terminal box 31 for a cable 32.
  • the casing 22 may be filled with insulating liquid and the fuses may be surrounded by air contained in the tube 24.
  • a handle 33 the fuses 23 may be removed from or inserted into the casing 22.
  • a high voltage metal clad switch-gear comprising, an electrically grounded metal casing, a cover plate on said casing, polyphase bus bars in said casing, a plurality of circuit-breakers in said casing, each circuitbreaker comprising for each phase, first elongated, tubular means suspended from said cover plate and made of insulating material, a first fixed contact mounted on said first tubular means extending radially inwardly thereof, a second fixed contact electrically connected to a corresponding bus bar and mounted on said first tubular means disposed axially spaced from the first fixed contact, second elongated, tubular means disposed coaxial with the first tubular means extending circumferentially along a part of the axial length thereof, a third fixed contact mounted on said second tubular means extending radially inwardly thereof, means providing electrical contact between the third fixed contact and said first contact, a lead-in conductor electrically connected to the third fixed contact, a make-and-break, movable, electrically conductive rod contact operable
  • a high voltage metal clad switch-gear comprising, an electrically grounded metal casing defining a compartment, acover plate on said casing, polyphase bus bars in said compartment, a plurality of circuit-breakers in said compartment, each circuit-breaker comprising for each phase, first elongated, tubular means suspended from said cover 'plate and made of insulating material, a first fixed contact mounted on said first tubular means extending radially inwardly thereof, a second fixed contact electrically connected to a corresponding bus bar and mounted on said first tubular means disposed axially spaced from the first fixed contact, second elongated, tubular meansdisposed coaxial with the first tubular means extending circumferentially along a part of the axial length thereof, a third fixed contact mounted on said second tubular means extending radially inwardly thereof, means mounting the bus bars on said second tubular means, means providing electrical contact between the third fixed contact and said first contact, a lead-in conductor electrically connected to the third fixed contact, a make-

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US725708A 1957-04-01 1958-04-01 Metal clad switch-gear Expired - Lifetime US2928922A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL215956 1957-04-01

Publications (1)

Publication Number Publication Date
US2928922A true US2928922A (en) 1960-03-15

Family

ID=19750857

Family Applications (1)

Application Number Title Priority Date Filing Date
US725708A Expired - Lifetime US2928922A (en) 1957-04-01 1958-04-01 Metal clad switch-gear

Country Status (6)

Country Link
US (1) US2928922A (de)
BE (1) BE557407A (de)
CH (1) CH362136A (de)
DE (1) DE1221708B (de)
FR (1) FR1177211A (de)
GB (1) GB844098A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507835A1 (fr) * 1981-06-16 1982-12-17 Merlin Gerin Cellule blindee a isolement gazeux pour poste electrique a moyenne tension
DE59406834D1 (de) * 1994-04-19 1998-10-08 Asea Brown Boveri Metallgekapselte gasisolierte Schaltanlage

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2287250A (en) * 1940-06-22 1942-06-23 Pennsylvania Company For Insur Circuit breaker

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944868C (de) * 1936-08-22 1956-06-28 Siemens Ag Elektrische Anlage, insbesondere fuer elektrische Bahnen
NL47529C (de) * 1936-11-17 1900-01-01
BE447059A (de) * 1940-04-09
DE944972C (de) * 1943-11-09 1956-06-28 Aeg Schaltanlage, deren Geraete in Behaeltern angeordnet sind, die unter UEberdruck stehen
NL67638C (de) * 1946-01-16 1900-01-01

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2287250A (en) * 1940-06-22 1942-06-23 Pennsylvania Company For Insur Circuit breaker

Also Published As

Publication number Publication date
FR1177211A (fr) 1959-04-22
GB844098A (en) 1960-08-10
DE1221708B (de) 1966-07-28
BE557407A (de)
CH362136A (de) 1962-05-31

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