US2510686A - Insulating bushing for a lead-in conductor to a capacitor housed in a vessel containing a gas under pressure - Google Patents

Insulating bushing for a lead-in conductor to a capacitor housed in a vessel containing a gas under pressure Download PDF

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Publication number
US2510686A
US2510686A US685173A US68517346A US2510686A US 2510686 A US2510686 A US 2510686A US 685173 A US685173 A US 685173A US 68517346 A US68517346 A US 68517346A US 2510686 A US2510686 A US 2510686A
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US
United States
Prior art keywords
lead
conductor
gas under
insulator
under pressure
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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
US685173A
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English (en)
Inventor
Lange Cornelis De
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.)
Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
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Publication of US2510686A publication Critical patent/US2510686A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/30—Sealing
    • H01B17/303—Sealing of leads to lead-through insulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/018—Dielectrics
    • H01G4/02—Gas or vapour dielectrics

Definitions

  • This invention relates to an electric device, more particularly a condenser placed in a gasfilled pressure vessel, a supply conductor of which is led through the wall of the vessel in a gastight and insulated manner by means of a ceramic intermediate piece and is supported outside the vessel by a lead-in insulator which concentrically surrounds the supply conductor and whose base is fastened to the wall of the vessel.
  • the condenser is housed in a pressure vessel filled with gas, for example nitrogen, up to a pressure of 20 atmospheres.
  • gas for example nitrogen
  • the breakdown voltage and the security in operation of the condenser appreciably increases by the use of gas under pressure.
  • a construction utilises welded sheet steel for the pressure vessel.
  • a ceramic intermediate piece arranged in a gas-tight manner is particularly suitable for the purpose.
  • To this type belongs the known glass-chrome iron lead-in device.
  • Pressure condensers have the drawback of the danger of explosion. It is not diflicult for the vessel containing the condenser to be constructed so rigidly that the risk of breakage thereof is practically precluded.
  • the glass intermediate piece necessary for the gas-tight and insulated entry of a supply conductor through the Wall forms, however, the weakest point of the vessel. If here pressure occurs, the lead-in insulator arranged outside the vessel will also be exposed to the pressure prevailing in the vessel. Since the dielectric losses must be small, this lead-in insulator has a small wall thickness, so that it cannot resist the high pressure which occurs in the case of breakage of the intermediate piece. The fragments of this insulator and of the glass intermediate piece will now be flung away by the force of the escaping gases. In this case there is a danger to apparatus which may be present and a risk of damage to the other parts of the installation in the vicinity of which the condenser is located.
  • the present invention has for its object to eliminate the said drawbacks by providing a construction which offers great safety.
  • the space located between the ceramic intermediate piece and the lead-in insulator is shut ofi from the atmosphere by means of a membrane which is not able to resist the pressure normally prevailing in the pressure vessel. If, now, breakage of the ceramic intermediate piece occurs, the space located between the intermediate piece and the lead-in insulator will be filled with gas under high pressure, so that the membrane will break down. The gases now break a way and the lead-in insulator is not exposed to a high pressure, so that any action of fragments is'avoided.
  • the membrane exhibits a flat annular shape and is secured between the supply conductor and the ring which concentrically surrounds the latter and is fastened to the lead-in insulator.
  • a partition is arranged between a glass intermediate piece and the lead-in insulator and concentrically about the supply conductor. It has been found, that in the case of breakage this partition reduces the action of fragments in such manner that breakage of the lead-in insulator is no longer to be feared.
  • this partition it is also possible for this partition to be made from so tough a material and/or of such thickness that in the case of breakage of the intermediate piece it is completely resistant to the action of fragments.
  • the partition must not prevent the passage of the gases. To this end, it may comprise apertures or it may not extend as partition must not necessarily exhibit excellent insulating properties whilst a decrease of the creeping distance is out of the question.
  • Fig. 1a is a cross-sectionalview-of the 'lead in construction according to the invention for -a pressure housed capacitor;
  • Fig. 1b is a top view of the device shownin:
  • the steel wall I of-the vessel has a chrome-iron cylinder 2"welded in it.
  • the latter is connected, by means of aglass intermediate piece 3, to a chrome-iron ring 4 soldered ⁇ to thesupply conductors which is thus led; through the. wall I in a gas-tight and insulated ..manner.
  • screening ringsla, l9, Hand 2! are provided.
  • the lead-in insulator-,6 has arranged on it a metal ring-ii .which,vby means of a number -,of spokes l0, ll, l2 and I3 (see Fig' 1b), is connected to a ringi l4 .arranged on the supply conductor ,5. -The lead-in'iinsulator 6 takes up, via the spokes; the forces exerted on the supply conductor. . The membrane l issecured between the ring 9 and the supply-conductor 5. Between the inter mediate piece 3 and the lead-in insulator e" is arranged-the partition l6 whichexhibits an aperture I] provided concentrically about'the supply conductor-.5.
  • @Gondensers according to the invention are completely ireefrom any action of fragments andithuszparticularly advantageous to be housed in*spaces in which operating staff must always be presehtzand/orvulnerable devices are arranged.
  • a hollow iinsulatingasupporting member exterior to and secured to the hous wing and concentric with the lead-in conductor which defines an enclosed space between it and the protective- 'member, and a collapsible memfbraneinterposed between the supporting mem- "berand thelea'diin conductor which collapses "member exceeds 1; that normally prevailing therein.
  • .ZiTAn insulating bushing for a lead-in con- .ductor extending into a housing for a capacitor and the like containing a gas under pressure comprisingan insulating protective member interposed between the walls of the housing and the .leacl-in conductor, a gas-tight member interposed between the protective member and leadin conductor, a hollow. dome-like insulating supporting member exterior to and secured to the housing and.
  • insulating bushing for a .lead-in conductor Whichextends. into ahousing for a capacitor and thelike containing a gas under pressure comprisingan insulating protective member interposed between the walls oi the housing and theJlead-in conductor, a gas-tight member interposed between-the protective member and the lead-in conductor.
  • a gas under pressure comprising a ceramic member interposed between the walls of the housing and the lead-in conductor, a gas-tight member interposed between the ceramic member and the lead-in conductor, a hollow dome-like insulating supporting member exterior to and secured to the housing and concentric with the lead-in conductor, an annular ring-like member for securing the lead-in conductor to the supporting member, a flat annular membrane interposed between the ring-like member and the lead-in conductor which collapses when the pressure prevailing in the space between the supporting member and the protective member exceeds that normally prevailing therein, a partition of material resistant to fragmentation of the ceramic member interposed between the lead-in conductor-and the ceramic member and having an aperture therein concentric with the lead-in conductor and dimensioned to restrict the flow of gas there- 5 through when the ceramic member shatters.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Insulators (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
US685173A 1943-02-17 1946-07-20 Insulating bushing for a lead-in conductor to a capacitor housed in a vessel containing a gas under pressure Expired - Lifetime US2510686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL109821A NL61904C (en)) 1943-02-17 1943-02-17

Publications (1)

Publication Number Publication Date
US2510686A true US2510686A (en) 1950-06-06

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ID=19874518

Family Applications (1)

Application Number Title Priority Date Filing Date
US685173A Expired - Lifetime US2510686A (en) 1943-02-17 1946-07-20 Insulating bushing for a lead-in conductor to a capacitor housed in a vessel containing a gas under pressure

Country Status (5)

Country Link
US (1) US2510686A (en))
BE (1) BE454419A (en))
CH (1) CH242034A (en))
GB (1) GB630259A (en))
NL (1) NL61904C (en))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4294591A (en) * 1980-05-12 1981-10-13 Envirotech Corporation Mounting for high-voltage electrode support frame in an electrostatic precipitator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899612A (en) * 1959-08-11 Emmett uenn

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1222439A (en) * 1911-06-23 1917-04-10 Gen Electric Electric switch.
US1877586A (en) * 1930-02-15 1932-09-13 Delta Star Electric Co Top cap assembly for high voltage bushings
US2082055A (en) * 1936-03-27 1937-06-01 Ohio Brass Co Bushing insulator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1222439A (en) * 1911-06-23 1917-04-10 Gen Electric Electric switch.
US1877586A (en) * 1930-02-15 1932-09-13 Delta Star Electric Co Top cap assembly for high voltage bushings
US2082055A (en) * 1936-03-27 1937-06-01 Ohio Brass Co Bushing insulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4294591A (en) * 1980-05-12 1981-10-13 Envirotech Corporation Mounting for high-voltage electrode support frame in an electrostatic precipitator

Also Published As

Publication number Publication date
NL61904C (en)) 1947-12-15
CH242034A (de) 1946-04-15
BE454419A (en)) 1944-03-31
GB630259A (en) 1949-10-10

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