WO2014102699A1 - A pole assembly of a circuit breaker in air insulated switchgear - Google Patents

A pole assembly of a circuit breaker in air insulated switchgear Download PDF

Info

Publication number
WO2014102699A1
WO2014102699A1 PCT/IB2013/061263 IB2013061263W WO2014102699A1 WO 2014102699 A1 WO2014102699 A1 WO 2014102699A1 IB 2013061263 W IB2013061263 W IB 2013061263W WO 2014102699 A1 WO2014102699 A1 WO 2014102699A1
Authority
WO
WIPO (PCT)
Prior art keywords
pole assembly
vacuum interrupter
terminal
components
housing
Prior art date
Application number
PCT/IB2013/061263
Other languages
French (fr)
Inventor
Bhushan KULKARNI
Subbiahthever Dukkaiappan
Hrishikesh S BRAMHAPURIKAR
Ramesh V
Original Assignee
Abb Technology Ltd
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 Ltd filed Critical Abb Technology Ltd
Priority to CN201390001016.3U priority Critical patent/CN205282361U/en
Publication of WO2014102699A1 publication Critical patent/WO2014102699A1/en

Links

Classifications

    • 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
    • H01H2033/6623—Details relating to the encasing or the outside layers of the vacuum switch housings

Definitions

  • the invention relates to a pole assembly of a circuit breaker in air insulated switchgear and more particularly to the pole assembly having integrated components.
  • a pole assembly primarily consists of a vacuum interrupter along with current carrying components, and either placed inside a break chamber / housing or molded together to form an encapsulated pole assembly.
  • the break chamber or the housing is usually a hollow chamber made of epoxy resin.
  • the vacuum interrupter and the current carrying components are placed inside the housing and assembled together with connecting parts.
  • the vacuum interrupter is held in position at the top and bottom inside the housing by vacuum interrupter top and bottom support respectively.
  • the current carrying components at the top portion of the pole assembly include the vacuum interrupter top support, connecting piece and the top terminal.
  • the current carrying components at the bottom portion of the pole assembly include the vacuum interrupter bottom support, connecting piece and the bottom terminal.
  • the break chamber or the housing accommodates three vacuum interrupters within a common semi enclosed enclosure that is dough molded.
  • the vacuum interrupter and the current carrying components are molded together to form a single encapsulated pole assembly.
  • the number of current carrying components are more, and that means the number of joints that the pole assembly is encountered with is also more.
  • the resulting length of the conducting circuit for the circuit breaker is more. This eventually increases the resistance in the current carrying path and reduces the current carrying capacity. Besides this, it leads to localized heating of the parts or components of the pole assembly and induces stress in the components and reduces the life of the components thereof. Therefore, there is a need for a pole assembly that has reduced number of components yet integrated to functionally serve its intended purpose in the pole assembly.
  • the invention is aimed at providing a break chamber or housing of the vacuum interrupter, for a pole assembly that renders the construction of the pole assembly simple with reduced number of components.
  • Further object of the invention is to provide a pole assembly that exhibits less resistance to the current carrying path.
  • Another object of the invention is to minimize the forces generated during the short circuit fault in the distribution system where the breaker is placed.
  • Yet another object of the invention is to provide a pole assembly that is durable and more reliable in its operation.
  • the present invention provides a pole assembly of a circuit breaker in air insulated switchgear.
  • the pole assembly of the invention comprises a vacuum interrupter having a fixed contact and a movable contact, and at least one terminal electrically connected to one of the fixed contact or movable contact.
  • the terminal is disposed within a hollow connecting piece electrically connected to the fixed contact or movable contact.
  • FIG. 1 shows a pole assembly in accordance with a prior art
  • Fig. 2 shows a pole assembly in accordance with another prior art
  • Fig. 3 shows a pole assembly in accordance with yet another prior art
  • Figs. 4a to 4c show a pole assembly in accordance with various embodiment of the invention.
  • Figs. 1 to 3 illustrate various embodiments or types of pole assemblies in accordance with different prior arts.
  • a pole assembly (100) is shown having a vacuum interrupter (101) disposed inside a break chamber or housing (104).
  • the pole assembly (100) has two support parts namely top support part (102) and bottom support part (103) that supports and positions the vacuum interrupter within the housing (104).
  • the fixed and movable contact of the vacuum interrupter (101) is electrically connected to the respective terminals through connecting components (105).
  • Fig. 2 shows a pole assembly (200) having vacuum interrupters (201), each disposed within a semi enclosed housing (204).
  • the fixed and movable contacts of the vacuum interrupter are electrically connected to the top terminal plate (202) and bottom terminal plate (203) correspondingly.
  • the top and bottom terminal plate (202 and 203) provides the support for the vacuum interrupter and positions it within the housing (204).
  • a pole assembly (300) is shown having a vacuum interrupter (301), wherein the fixed and movable contacts of the vacuum interrupter (301) is electrically connected to top terminal (302) and bottom terminal (303) correspondingly .
  • the top and bottom terminal (302 and 303) provides the support that is required for the vacuum interrupter and positions it accordingly within the housing (301).
  • the extensions or arms (304) are fixed to the top and bottom terminals (302 and 303) to enable engagement or disengagement.
  • the pole assemblies has more number of individual components including terminals, connecting pieces and vacuum interrupter support. Accordingly, the number of joints coupling or connecting these components is directly proportional, due to which the resistance to the current carrying path increases and also the pole assembly is vulnerable to misalignment of the components or loosening of the connected components.
  • FIGs. 4a to 4c various embodiments of pole assembly (400) in accordance with the invention is shown.
  • the pole assembly (400) has a vacuum interrupter (401) disposed within a break chamber or housing (404).
  • the fixed and movable contacts of the vacuum interrupter are electrically connected to the top terminal (402) and bottom terminal (403) correspondingly.
  • the top and / or bottom terminals are disposed with a hollow connecting component (405).
  • the hollow connecting component is fixed to the break chamber or housing (404) of the vacuum interrupter (401) by a suitable fastening means.
  • the fastening means include screw or the like that functionally serve to fasten.
  • the top terminal (402) and / or the bottom terminal (403) are encapsulated with an epoxy coating (406).
  • the connecting component also serves as the support for the vacuum interrupters and also positions it within the break chamber or the housing (404).
  • the pole assembly of the invention has less number of components. Rather the components are integrated to serve different functionality of support, positioning, connecting the fixed or movable contacts of the vacuum interrupter correspondingly to its respective terminals. Accordingly, the resistance to the current carrying path is largely reduced and also the localized heat generated is reduced, thereby reducing the stress on the components. Through these, the pole assembly exhibits improved performance and efficiency and durability besides providing reliable operation.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

The invention relates to a pole assembly of a circuit breaker in air insulated switchgear. The pole assembly comprises a vacuum interrupter having a fixed contact and a movable contact and at least one terminal. The terminal is electrically connected to at least one of the fixed contact or movable contact. The at least one terminal is disposed within a hollow connecting piece electrically connected to the at least one of the fixed contact or movable contact.

Description

A POLE ASSEMBLY OF A CIRCUIT BREAKER IN AIR INSULATED
SWITCHGEAR
FIELD OF THE INVENTION
The invention relates to a pole assembly of a circuit breaker in air insulated switchgear and more particularly to the pole assembly having integrated components.
BACKGROUND
Generally, a pole assembly primarily consists of a vacuum interrupter along with current carrying components, and either placed inside a break chamber / housing or molded together to form an encapsulated pole assembly.
The break chamber or the housing is usually a hollow chamber made of epoxy resin. The vacuum interrupter and the current carrying components are placed inside the housing and assembled together with connecting parts. The vacuum interrupter is held in position at the top and bottom inside the housing by vacuum interrupter top and bottom support respectively. Here, the current carrying components at the top portion of the pole assembly include the vacuum interrupter top support, connecting piece and the top terminal. Similarly, the current carrying components at the bottom portion of the pole assembly include the vacuum interrupter bottom support, connecting piece and the bottom terminal.
On the other hand, in certain pole assemblies, the break chamber or the housing accommodates three vacuum interrupters within a common semi enclosed enclosure that is dough molded. In another type of pole assemblies, the vacuum interrupter and the current carrying components are molded together to form a single encapsulated pole assembly.
In all of the above referred pole assemblies, the number of current carrying components are more, and that means the number of joints that the pole assembly is encountered with is also more. In addition, the resulting length of the conducting circuit for the circuit breaker is more. This eventually increases the resistance in the current carrying path and reduces the current carrying capacity. Besides this, it leads to localized heating of the parts or components of the pole assembly and induces stress in the components and reduces the life of the components thereof. Therefore, there is a need for a pole assembly that has reduced number of components yet integrated to functionally serve its intended purpose in the pole assembly. The invention is aimed at providing a break chamber or housing of the vacuum interrupter, for a pole assembly that renders the construction of the pole assembly simple with reduced number of components.
OBJECTS OF THE INVENTION
It is an object of the invention to provide a pole assembly that is simple in construction.
It is another object of the invention to provide a pole assembly that has reduced number of components.
It is yet another object of the invention to provide a pole assembly that has improved performance and efficiency thereof.
Further object of the invention is to provide a pole assembly that exhibits less resistance to the current carrying path.
Another object of the invention is to minimize the forces generated during the short circuit fault in the distribution system where the breaker is placed.
Yet another object of the invention is to provide a pole assembly that is durable and more reliable in its operation.
SUMMARY OF THE INVENTION
Accordingly the present invention provides a pole assembly of a circuit breaker in air insulated switchgear. The pole assembly of the invention comprises a vacuum interrupter having a fixed contact and a movable contact, and at least one terminal electrically connected to one of the fixed contact or movable contact. The terminal is disposed within a hollow connecting piece electrically connected to the fixed contact or movable contact.
BRIEF DESRIPTION OF THE DRAWINGS
With reference to the accompanying drawings in which: Fig. 1 shows a pole assembly in accordance with a prior art; Fig. 2 shows a pole assembly in accordance with another prior art;
Fig. 3 shows a pole assembly in accordance with yet another prior art; and
Figs. 4a to 4c show a pole assembly in accordance with various embodiment of the invention.
DETAILED DESCRIPTION
The invention is herein described with reference to non-exhaustive exemplary embodiments.
Figs. 1 to 3 illustrate various embodiments or types of pole assemblies in accordance with different prior arts. In Fig. 1 , a pole assembly (100) is shown having a vacuum interrupter (101) disposed inside a break chamber or housing (104). The pole assembly (100) has two support parts namely top support part (102) and bottom support part (103) that supports and positions the vacuum interrupter within the housing (104). The fixed and movable contact of the vacuum interrupter (101) is electrically connected to the respective terminals through connecting components (105).
Fig. 2 shows a pole assembly (200) having vacuum interrupters (201), each disposed within a semi enclosed housing (204). The fixed and movable contacts of the vacuum interrupter are electrically connected to the top terminal plate (202) and bottom terminal plate (203) correspondingly. The top and bottom terminal plate (202 and 203) provides the support for the vacuum interrupter and positions it within the housing (204).
In Fig. 3, a pole assembly (300) is shown having a vacuum interrupter (301), wherein the fixed and movable contacts of the vacuum interrupter (301) is electrically connected to top terminal (302) and bottom terminal (303) correspondingly . The top and bottom terminal (302 and 303) provides the support that is required for the vacuum interrupter and positions it accordingly within the housing (301). The extensions or arms (304) are fixed to the top and bottom terminals (302 and 303) to enable engagement or disengagement.
In the above described pole assemblies of the prior arts, the pole assemblies has more number of individual components including terminals, connecting pieces and vacuum interrupter support. Accordingly, the number of joints coupling or connecting these components is directly proportional, due to which the resistance to the current carrying path increases and also the pole assembly is vulnerable to misalignment of the components or loosening of the connected components. In Figs. 4a to 4c various embodiments of pole assembly (400) in accordance with the invention is shown. The pole assembly (400) has a vacuum interrupter (401) disposed within a break chamber or housing (404). The fixed and movable contacts of the vacuum interrupter are electrically connected to the top terminal (402) and bottom terminal (403) correspondingly. The top and / or bottom terminals are disposed with a hollow connecting component (405). The hollow connecting component is fixed to the break chamber or housing (404) of the vacuum interrupter (401) by a suitable fastening means. The fastening means include screw or the like that functionally serve to fasten. The top terminal (402) and / or the bottom terminal (403) are encapsulated with an epoxy coating (406). The connecting component also serves as the support for the vacuum interrupters and also positions it within the break chamber or the housing (404).
Here, the pole assembly of the invention has less number of components. Rather the components are integrated to serve different functionality of support, positioning, connecting the fixed or movable contacts of the vacuum interrupter correspondingly to its respective terminals. Accordingly, the resistance to the current carrying path is largely reduced and also the localized heat generated is reduced, thereby reducing the stress on the components. Through these, the pole assembly exhibits improved performance and efficiency and durability besides providing reliable operation.
Only certain features of the invention have been specifically illustrated and described herein, and many modifications and changes will occur to those skilled in the art. The invention is not restricted by the preferred embodiment described herein in the description. It is to be noted that the invention is explained by way of exemplary embodiment and is neither exhaustive nor limiting. Certain aspects of the invention that not been elaborated herein in the description are well understood by one skilled in the art. Also, the terms relating to singular form used herein in the description also include its plurality and vice versa, wherever applicable. Any relevant modification or variation, which is not described specifically in the specification are in fact to be construed of being well within the scope of the invention. The appended claims are intended to cover all such modifications and changes which fall within the spirit of the invention.
Thus, it will be appreciated by those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The presently disclosed embodiments are therefore considered in all respects to be illustrative and not restricted. The scope of the invention is indicated by the appended claims rather than the foregoing description and all changes that come within the meaning and range and equivalence thereof are intended to be embraced therein.

Claims

WE CLAIM:
1. A pole assembly comprising:
a vacuum interrupter having a fixed contact and a movable contact;
at least one terminal electrically connected to at least one of the said fixed contact or said movable contact; wherein the said at least one terminal is disposed within a hollow connecting piece electrically connected to the at least one of the said fixed contact or said movable contact.
2. The pole assembly as claimed in claim 1 , wherein the said hollow connecting piece is fixed to the housing of the said vacuum interrupter.
3. The pole assembly as claimed in claims 1 and 2, wherein the said hollow connecting piece is in corresponding alignment with the said fixed contact or movable contact.
4. The pole assembly as claimed in claim 2, wherein the said hollow connecting piece is fixed to the housing of the said vacuum interrupter by a fastening means.
5. The pole assembly as claimed in claim 1 , wherein the said terminals include top and / or bottom terminals.
6. The pole assembly as claimed in any one of the preceding claims, wherein the said terminals are casted in solid insulating material.
7. The pole assembly as claimed in claim 6, wherein the solid insulating material includes epoxy.
PCT/IB2013/061263 2012-12-24 2013-12-23 A pole assembly of a circuit breaker in air insulated switchgear WO2014102699A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201390001016.3U CN205282361U (en) 2012-12-24 2013-12-23 Circuit breaker's among air insulation switching device utmost point subassembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN5363CH2012 2012-12-24
IN5363/CHE/2012 2012-12-24

Publications (1)

Publication Number Publication Date
WO2014102699A1 true WO2014102699A1 (en) 2014-07-03

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ID=50070623

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2013/061263 WO2014102699A1 (en) 2012-12-24 2013-12-23 A pole assembly of a circuit breaker in air insulated switchgear

Country Status (2)

Country Link
CN (1) CN205282361U (en)
WO (1) WO2014102699A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104201044A (en) * 2014-09-05 2014-12-10 洛阳通颖电气有限公司 Novel embedded pole
EP3499537A1 (en) * 2017-12-15 2019-06-19 ABB Schweiz AG Fixation system in use for medium or high voltage switching poles

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106887362B (en) * 2017-03-15 2019-03-15 平高集团有限公司 A kind of modularization pole and its manufacturing method, pole ontology, joint module
CN108493037B (en) * 2018-03-02 2019-05-10 西安交通大学 A kind of double acting conducting rod and bi-bellow structure for vacuum arc-chutes and working method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866481A2 (en) * 1997-03-22 1998-09-23 ABBPATENT GmbH Vacuum chamber
US20050067380A1 (en) * 2001-06-01 2005-03-31 Hubbell Incorporated Circuit interrupting device with a turnbuckle and weld break assembly
DE202007003867U1 (en) * 2007-03-13 2007-05-16 Xiamen Huadian Switchgaer Co., Ltd., Xiamen Vacuum circuit breaker tube for use in e.g. power generating plant, has insulating layer, which is combined with chamber and other components such as upper contact lead end piece and locking nut and is totally encapsulated in housing
US20080053810A1 (en) * 2004-09-24 2008-03-06 Siemens Aktiengesellschaft Solid-Insulated Switch Pole with an End Moving Contact Connection
DE102007042041B3 (en) * 2007-09-05 2009-02-12 Siemens Ag Switch pole for a power grid

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866481A2 (en) * 1997-03-22 1998-09-23 ABBPATENT GmbH Vacuum chamber
US20050067380A1 (en) * 2001-06-01 2005-03-31 Hubbell Incorporated Circuit interrupting device with a turnbuckle and weld break assembly
US20080053810A1 (en) * 2004-09-24 2008-03-06 Siemens Aktiengesellschaft Solid-Insulated Switch Pole with an End Moving Contact Connection
DE202007003867U1 (en) * 2007-03-13 2007-05-16 Xiamen Huadian Switchgaer Co., Ltd., Xiamen Vacuum circuit breaker tube for use in e.g. power generating plant, has insulating layer, which is combined with chamber and other components such as upper contact lead end piece and locking nut and is totally encapsulated in housing
DE102007042041B3 (en) * 2007-09-05 2009-02-12 Siemens Ag Switch pole for a power grid

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104201044A (en) * 2014-09-05 2014-12-10 洛阳通颖电气有限公司 Novel embedded pole
EP3499537A1 (en) * 2017-12-15 2019-06-19 ABB Schweiz AG Fixation system in use for medium or high voltage switching poles
WO2019115785A1 (en) * 2017-12-15 2019-06-20 Abb Schweiz Ag Fixation system in use for medium or high voltage switching poles
CN111801759A (en) * 2017-12-15 2020-10-20 Abb瑞士股份有限公司 Fixing system for medium-voltage or high-voltage switching poles
RU2741073C1 (en) * 2017-12-15 2021-01-22 Абб Швайц Аг Locking system for poles of switches of medium or high voltage
US11322864B2 (en) 2017-12-15 2022-05-03 Abb Schweiz Ag Fixation system that serves to ground an insulated housing

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Publication number Publication date
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