WO2015028141A1 - Embedded pole part - Google Patents

Embedded pole part Download PDF

Info

Publication number
WO2015028141A1
WO2015028141A1 PCT/EP2014/002322 EP2014002322W WO2015028141A1 WO 2015028141 A1 WO2015028141 A1 WO 2015028141A1 EP 2014002322 W EP2014002322 W EP 2014002322W WO 2015028141 A1 WO2015028141 A1 WO 2015028141A1
Authority
WO
WIPO (PCT)
Prior art keywords
dome
pole part
resin
embedded pole
sphered
Prior art date
Application number
PCT/EP2014/002322
Other languages
French (fr)
Inventor
Dietmar Gentsch
Dukkaiappan SUBBIAH THEVAR
Original Assignee
Abb Technology Ag
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 Abb Technology Ag filed Critical Abb Technology Ag
Publication of WO2015028141A1 publication Critical patent/WO2015028141A1/en

Links

Classifications

    • 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
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/6606—Terminal arrangements
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/6623—Details relating to the encasing or the outside layers of the vacuum switch housings

Definitions

  • the invention relates to an embedded pole part with a vacuum interrupter molded in a resin of insulating material, wherein the vacuum interrupter is provided with at least one moving contact and one fixed contact inside the vacuum interrupter, and with externally to the resin ending contact rods, going through the resin, for contacting the vacuum interrupter from outside the resin, according to the preamble of claim 1.
  • Embedded pole parts are used in medium- and high-voltage switchgears.
  • Switchgears are well known in indoor and outdoor applications.
  • the invention is, that the area of the insulating resin around at least one of the contact rods is dome-shaped or dome-sphered, and covered additionally by a complementary dome-sphered metallic shield, through which the contact rod is guided though by an opening.
  • the embedded pole part is protected against the surrounding high pressure environment in a proper way.
  • the metallic shield or the metallic shields are fixed on the dome shaped area of the insulating resin and/or additionally fixed by glueing or liquid sealing.
  • glueing or liquid sealing By this is given a good fixation, as well as a good tightening.
  • the dome-shaped area of the insulating resin has a solid cross section and not a hollow cross section. So both, the dome-shaped resin area and the dome-shaped or dome-sphered metal cap do have a higher withstand against the surrounding pressure environment of subsea applications.
  • a sealing in order to seal the opening in the metal cap against the contact rod and the resins dome-shaped area under the metal cap.
  • a further advantageous embodiment is, that the bottom of the pole part, where a push rod for moving the moving contact of vacuum interrupter is located, is tightly and pressure resistant closed by a further dome-sphered cap.
  • a further dome-sphered cap Normally the bottom side of embedded pole parts are open or partly open. In this application, they are not only closed, but closed in that pressure resistant way.
  • the dome-sphered metal caps are sealed pressure tight by redundant sealing elements, that means with at least two sealings, which are arranged concentrically.
  • a further alternative for the fixation of the dome-sphered or dome shaped metal cap at the bottom of the resin body is, that the inner surface of the dome- shaped metal cap is provided with a cylindrical ring, which is moulded into the insulating resin body at the bottom of the insulating resin body tightly.
  • a further advantageous embodiment is, that the outer surface of the insulating body is along its length provided with rips, perpendicularly arranged to the long axis of the length of the resin body. This results in a creepage length extension.
  • each pole consists of a vacuum interrupter 15 along with two copper contacts 3, 9 embedded in special high strength epoxy material.
  • the embedded pole also houses, a single coil magnetic actuator 16, an insulating pushrod between the actuator 16 and the moving contact of the vacuum interrupter 15.
  • the vacuum interrupter 15 and the copper contacts 3, 9 are embedded inside special high strength epoxy material 2.
  • the interrupter 15 is provided with silicone encapsulation 6 before embedding in order to provide a flexible interlay to take care of the shrinkage during the molding and curing processes.
  • the thickness of the epoxy material 2 is chosen in such a way to withstand the required pressure lever of 300 bar.
  • the copper connection terminals are provided with a unique metallic shield 10, 5 with liquid sealing arrangement, so that the interface between the copper and epoxy can withstand the pressure.
  • the lower part of the embedded pole is hollow to accommodate the push rod and single coil magnetic actuator 16.
  • the single coil magnetic actuator 16 is directly connected to the moving contact of the vacuum
  • the lower part of the pole is closed by means of a preferably dome shaped metallic cover or cap12, which is bolted to the embedded pole and sealed by liquid sealing technique. Therefore, the metallic cover or cap 12 is fastened to the resin body by screws 13, or a kind of a cylindrical part formed at the inner side of the dome shaped metallic cover or cap 12, which is moulded into the insulating resin body 2.
  • the secondary connection to the magnetic actuator 16 can be done through a penetrator fixed on the metallic cover.
  • the outer surface of the insulating body is along its length provided with rips (17), perpendicularly arranged to the long axis of the length of the resin body (2). This results in a creepage length extension.
  • cushioning material on vacuum interrupter to withstand the pressure during molding process and during operating conditions in subsea.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

The invention relates to an embedded pole part with a vacuum interrupter molded in a resin of insulating material, wherein the vacuum interrupter is provided with at least one moving contact and one fixed contact inside the vacuum interrupter, and with externally to the resin ending contact rods, going through the resin, for contacting the vacuum interrupter from outside the resin, according to the preamble of claim 1. In order to develop embedded pole parts for the use under high pressure conditions for application at outer side Subsea, the invention is, that the area of the insulating resin (2) around at least one of the contact rods (3, 9) is dome-shaped or dome-sphered, and covered additionally by a complementary dome-sphered metallic shield (5, 10), through which the contact rod (3, 9) is guided though by an opening.

Description

Embedded pole part
The invention relates to an embedded pole part with a vacuum interrupter molded in a resin of insulating material, wherein the vacuum interrupter is provided with at least one moving contact and one fixed contact inside the vacuum interrupter, and with externally to the resin ending contact rods, going through the resin, for contacting the vacuum interrupter from outside the resin, according to the preamble of claim 1.
Embedded pole parts are used in medium- and high-voltage switchgears.
Switchgears are well known in indoor and outdoor applications.
It is an object of this invention, to develop embedded pole parts for the use under high pressure conditions for application at outer side subsea.
For this use, the invention is, that the area of the insulating resin around at least one of the contact rods is dome-shaped or dome-sphered, and covered additionally by a complementary dome-sphered metallic shield, through which the contact rod is guided though by an opening.
By that, the embedded pole part is protected against the surrounding high pressure environment in a proper way.
In a further advantageous embodiment the metallic shield or the metallic shields are fixed on the dome shaped area of the insulating resin and/or additionally fixed by glueing or liquid sealing. By this is given a good fixation, as well as a good tightening. ln a further advantageous embodiment, the dome-shaped area of the insulating resin has a solid cross section and not a hollow cross section. So both, the dome-shaped resin area and the dome-shaped or dome-sphered metal cap do have a higher withstand against the surrounding pressure environment of subsea applications.
In a further advantageous embodiment is disclosed, that between the contact rod and the opening in the metal dome-sphered cap is arranged a sealing, in order to seal the opening in the metal cap against the contact rod and the resins dome-shaped area under the metal cap. This result in a high pressure resistance of the complete construction of the embedded pole part in that area.
A further advantageous embodiment is, that the bottom of the pole part, where a push rod for moving the moving contact of vacuum interrupter is located, is tightly and pressure resistant closed by a further dome-sphered cap. Normally the bottom side of embedded pole parts are open or partly open. In this application, they are not only closed, but closed in that pressure resistant way.
In order to result in proper sealing conditions, the dome-sphered metal caps are sealed pressure tight by redundant sealing elements, that means with at least two sealings, which are arranged concentrically.
A further alternative for the fixation of the dome-sphered or dome shaped metal cap at the bottom of the resin body is, that the inner surface of the dome- shaped metal cap is provided with a cylindrical ring, which is moulded into the insulating resin body at the bottom of the insulating resin body tightly.
A further advantageous embodiment is, that the outer surface of the insulating body is along its length provided with rips, perpendicularly arranged to the long axis of the length of the resin body. This results in a creepage length extension.
So with that, embedded pole parts like that can be used for switchgear arrangements for high-pressure sub-sea application. An embodiment of the invention is shown in Figure 1.
The concept considers three individual circuit breaker poles wherein each pole consists of a vacuum interrupter 15 along with two copper contacts 3, 9 embedded in special high strength epoxy material. The embedded pole also houses, a single coil magnetic actuator 16, an insulating pushrod between the actuator 16 and the moving contact of the vacuum interrupter 15.
In this concept the vacuum interrupter 15 and the copper contacts 3, 9 are embedded inside special high strength epoxy material 2. The interrupter 15 is provided with silicone encapsulation 6 before embedding in order to provide a flexible interlay to take care of the shrinkage during the molding and curing processes. The thickness of the epoxy material 2 is chosen in such a way to withstand the required pressure lever of 300 bar. The copper connection terminals are provided with a unique metallic shield 10, 5 with liquid sealing arrangement, so that the interface between the copper and epoxy can withstand the pressure. The lower part of the embedded pole is hollow to accommodate the push rod and single coil magnetic actuator 16. The single coil magnetic actuator 16 is directly connected to the moving contact of the vacuum
interrupter 15 through the insulation pushrod. This reduces the number of mechanical parts to a minimum and ensure high reliability. The lower part of the pole is closed by means of a preferably dome shaped metallic cover or cap12, which is bolted to the embedded pole and sealed by liquid sealing technique. Therefore, the metallic cover or cap 12 is fastened to the resin body by screws 13, or a kind of a cylindrical part formed at the inner side of the dome shaped metallic cover or cap 12, which is moulded into the insulating resin body 2.
The secondary connection to the magnetic actuator 16 can be done through a penetrator fixed on the metallic cover.
Furthermore the outer surface of the insulating body is along its length provided with rips (17), perpendicularly arranged to the long axis of the length of the resin body (2). This results in a creepage length extension.
For that, it is important to select suitable epoxy material and a composition and molding process to a pressure withstand of 300 bar.
Important is also the cushioning material on vacuum interrupter to withstand the pressure during molding process and during operating conditions in subsea.

Claims

Claims
1. Embedded pole part with a vacuum interrupter molded in a resin of insulating material, wherein the vacuum interrupter is provided with at least one moving contact and one fixed contact inside the vacuum interrupter, and with externally to the resin ending contact rods, going trough the resin, for contacting the vacuum interrupter from outside the resin,
characterized in
that the area of the insulating resin (2) around at least one of the contact rods (3, 9) is dome-shaped or dome-sphered, and covered additionally by a complementary dome-sphered metallic shield (5, 10), through which the contact rod (3, 9) is guided though by an opening.
2. Embedded pole part according to claim 1 ,
characterized in
that the metallic shield or the metallic shields (3, 9) are fixed on the dome shaped area of the insulating resin (2) and/or additionally fixed by glueing or liquid sealing.
3. Embedded pole part according to claim 1 or 2,
characterized in
that the dome-shaped area of the insultating resin (2) has a solid cross section and not a hollow cross section.
4. Embedded pole part according to claim 1 , 2 or 3,
characterized in
that between the contact rod and the opening in the metal dome-sphered metallic shield (5) is arranged a sealing, in order to seal the opening in the metallic shield against the contact rod and the resins dome-shaped area under the metallic shield.
5. Embedded pole part according to one of the aforesaid claims,
characterized in that the bottom of the pole part, where a push rod for moving the moving contact of vacuum interrupter is located, is tightly and pressure resistant closed by a further dome-sphered or dome shaped cap (12).
6. Embedded pole part according to claim 5,
characterized in
that the dome sphered or dome shaped metal cap (12) at the bottom of the pole part is provided with a cylindrical ring at its inner side, so that the aforesaid cap (12) is moulded into the bottom part of the resin body (2).
7. Embedded pole part according to one of the aforesaid claims,
characterized in
that the dome-sphered metal caps (5, 10, 12) are sealed pressure tight by redundant sealing elements, that means with at least two sealings, which are arranged concentrically.
8. Embedded pole part according to one of the aforesaid claims,
characterized in
that the inner surface of the dome-shaped metal cap is provided with a cylindrical ring (13), which is moulded into the insulating resin body (2) at the bottom of the insulating resin body (2) tightly.
9. Embedded pole part according to one of the aforesaid claims,
characterized in
that the outer surface of the insulating body (2) is along its length provided with rips (17), perpendicularly arranged to the long axis of the length of the resin body.
10. Embedded pole part according to one of the aforesaid claims, in use for
switchgear arrangements for high-pressure sub-sea application.
PCT/EP2014/002322 2013-08-26 2014-08-25 Embedded pole part WO2015028141A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13004206 2013-08-26
EP13004206.2 2013-08-26

Publications (1)

Publication Number Publication Date
WO2015028141A1 true WO2015028141A1 (en) 2015-03-05

Family

ID=49036414

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/002322 WO2015028141A1 (en) 2013-08-26 2014-08-25 Embedded pole part

Country Status (1)

Country Link
WO (1) WO2015028141A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3179583A1 (en) * 2015-12-11 2017-06-14 ABB Schweiz AG Subsea medium voltage vacuum circuit breaker in sf6 insulated housing for the use in high pressure environments
EP3182539A1 (en) * 2015-12-18 2017-06-21 ABB Technology AG Subsea housing for medium voltage vakuum circuit breaker in high pressure environment
EP3182438A1 (en) * 2015-12-18 2017-06-21 ABB Schweiz AG Subsea pressure resistant housing for an electric component

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004010448A1 (en) * 2002-07-23 2004-01-29 Maysteel Llc High voltage interrupter
WO2007056619A1 (en) * 2005-11-14 2007-05-18 Cooper Technologies Company Vacuum switchgear assembly, system and method
EP1942514A1 (en) * 2007-01-04 2008-07-09 Eaton Electric B.V. Switchgear for high pressure environments

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004010448A1 (en) * 2002-07-23 2004-01-29 Maysteel Llc High voltage interrupter
WO2007056619A1 (en) * 2005-11-14 2007-05-18 Cooper Technologies Company Vacuum switchgear assembly, system and method
EP1942514A1 (en) * 2007-01-04 2008-07-09 Eaton Electric B.V. Switchgear for high pressure environments

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FENSKI B ET AL: "Vacuum interrupteurs and embedded poles for medium voltage", vol. 3, 31 March 2007 (2007-03-31), pages 1 - 4, XP002562079, ISSN: 0948-7387, Retrieved from the Internet <URL:http://www05.abb.com/global/scot/scot235.nsf/veritydisplay/4c3de511fc561a62c125738c003c5611/$File/Offprint_ETZ_S3.2007_E.pdf> *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3179583A1 (en) * 2015-12-11 2017-06-14 ABB Schweiz AG Subsea medium voltage vacuum circuit breaker in sf6 insulated housing for the use in high pressure environments
EP3182539A1 (en) * 2015-12-18 2017-06-21 ABB Technology AG Subsea housing for medium voltage vakuum circuit breaker in high pressure environment
EP3182438A1 (en) * 2015-12-18 2017-06-21 ABB Schweiz AG Subsea pressure resistant housing for an electric component
US10109445B2 (en) 2015-12-18 2018-10-23 Abb Schweiz Ag Pressure resistant housing for subsea applications

Similar Documents

Publication Publication Date Title
US9165733B2 (en) Circuit breaker arrangement for medium voltage to high voltage applications
EP2593953B1 (en) Method for producing a circuit-breaker pole part
EP2622620B1 (en) Compact vacuum interrupter with selective encapsulation
CN1319232C (en) Switch device
US8237076B2 (en) Vacuum switch
US9431800B2 (en) Gas-insulated electric device
EP2859567B1 (en) Medium or high voltage switch bushing
WO2015028141A1 (en) Embedded pole part
CN106463300B (en) Method for producing a solid-insulated switching pole and solid-insulated switching pole
CN106133869B (en) Circuit breaker arrangement
CN102057548A (en) Insulating spacer for gas-insulated electrical equipment
EP2819143A1 (en) Tank-type vacuum circuit breaker
EP2362407B1 (en) A nozzle for a breaker, and a breaker having such a nozzle
WO2016070996A1 (en) Vacuum interrupter for low-, medium-, or high voltage use, for high environmental pressure application
CN202905578U (en) Ceramic vacuum switch tube for solid-sealed polar pole
KR101497068B1 (en) Ground and underground type epoxy mold insulated multi switch and switchgear
CN109478479B (en) Pole part for a low-, medium-or high-voltage circuit breaker and method for the production thereof
US20160240338A1 (en) Vacuum circuit breaker under high pressure
CN221262226U (en) Solid-sealed polar pole for wind power switch device
CN109844893B (en) High-voltage switching device, switching installation with a high-voltage switching device, and method for producing a high-voltage switching device
KR101037244B1 (en) Gas insulated switchgear
CN210516605U (en) Solid-sealed pole structure
EP3182426B1 (en) Current transformer for high voltage gas insulated switchgear substation
CN103123876A (en) Solid-sealed polar pole of vacuum arc-extinguishing chamber
AU2013219170B2 (en) A Vacuum Interrupter Assembly

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14755339

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14755339

Country of ref document: EP

Kind code of ref document: A1