WO2012142739A1 - Contact arm for switch device and circuit breaker thereof - Google Patents

Contact arm for switch device and circuit breaker thereof Download PDF

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Publication number
WO2012142739A1
WO2012142739A1 PCT/CN2011/072918 CN2011072918W WO2012142739A1 WO 2012142739 A1 WO2012142739 A1 WO 2012142739A1 CN 2011072918 W CN2011072918 W CN 2011072918W WO 2012142739 A1 WO2012142739 A1 WO 2012142739A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact arm
main conductor
pole
arm according
contact
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.)
Ceased
Application number
PCT/CN2011/072918
Other languages
French (fr)
Inventor
Zhanwei Tu
Guolong Zhang
Huozhu DENG
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.)
ABB Technology AG
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
Priority to PCT/CN2011/072918 priority Critical patent/WO2012142739A1/en
Priority to CN201190001077.0U priority patent/CN203983209U/en
Publication of WO2012142739A1 publication Critical patent/WO2012142739A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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

Definitions

  • This invention relates to the field of power products, and more particularly to a contact arm for the switch devices.
  • a vacuum circuit breaker is a device for protecting an electric power system, in which a vacuum interrupter is made of an arc extinguishing material so as to deliberately perform power transmission, switching, termination and the like and fast perform an automatic blocking of the electric power system when any breakdown occurs.
  • the vacuum circuit breaker serves to quickly break off a circuit by an arc extinguishing operation by which an arc product generated upon opening and closing a normal load and cutting off a fault current is rapidly dispersed within a vacuum container, thus to protect circuit and other equipment.
  • Such vacuum circuit breaker is provided with a main circuit section, a truck mechanism or a moving carriage, a cradle and an auxiliary element.
  • the truck mechanism is integrally coupled to the main circuit section, and provided with a mechanical part which selectively moves the main circuit section to the cradle.
  • the coupling or separation between the main circuit section and the cradle is allowed by a tulip contactor of the main circuit section and a cradle terminal of to the cradle.
  • Fig. 1 shows the contact arm which is generally used now.
  • Fig. 1 is the section view of the contact arm.
  • the contact arm is hollow and is made of copper.
  • the contact arm can meet the requirement of conductivity and heat dissipation. But the contact arm made of copper is very heavy and expensive. The heavy contact arm may make it fastness with the pole unsound, and in extreme cases the fastness between the contact arm and the pole may break off.
  • the present invention provides a contact arm for switch device and the circuit breaker thereof.
  • a contact arm for switch device comprises a main conductor which is adapted to connect with a pole.
  • the main conductor is solid and is made of aluminum or aluminum alloy.
  • the contact arm further comprises an anterior connect adaptor at the tulip contact end of the main conductor configured to connect with a tulip contact.
  • the main conductor comprises a concave part at the pole end of the main conductor adapted to accommodate an external protrusion for connecting with the pole.
  • the concave part can be a cylindrical hole or an internal screw thread adapted to connect with the pole by a bolt.
  • the main conductor is cylindrical or conical. And the diameter of the conical main conductor is decreasing towards the tulip contact end.
  • the contact arm further comprises a conductor protrusion configured to connect with the anterior connect adaptor.
  • the conductor protrusion can be a bolt and preferably a double start thread bolt.
  • the anterior connect adaptor is made of copper.
  • the anterior connect adaptor is made of aluminum or aluminum alloy and is an integral structure with the main conductor.
  • the external surface of said anterior connect adaptor is silver plating.
  • the contact arm further comprises a tulip contact.
  • the main conductor is covered by insulating material except the concave part.
  • a plurality of heat elimination grooves are provided on the surface of the main conductor near the anterior connect adaptor end.
  • the heat elimination grooves can increase the heat dissipation performance.
  • a circuit breaker comprises a pole, and a contact arm according to anyone of above.
  • the contact arm is fastened to the pole.
  • the contact arm in the circuit breaker, is also fastened to the pole by glue.
  • the contact arm of the present invention is much cheaper and much lighter.
  • the contact arm is more stable after fixed on the pole even after long use.
  • the contact arm of the present invention greatly cuts the costs of the circuit breakers.
  • Fig. 1 is the section view of the contact arm which is generally used now;
  • Fig. 2A, 2B and 2C show the structure of the contact arm of the present invention; wherein, Fig. 2A is the exploded view of the contact arm, Fig. 2B is the section view of the contact arm, Fig. 2C is the three-dimensional view of the contact arm.
  • Fig. 3 shows the structure of the contact arm of the present invention according to another preferred embodiment
  • Fig. 4 is the three-dimensional view of the contact arm with tulip contact
  • Fig. 5 is the three-dimensional view of the contact arms fasten on the pole.
  • Fig. 2A, 2B and 2C show the structure of the contact arm of the present invention according to a preferred embodiment; wherein, Fig. 2A is the exploded view of the contact arm, Fig. 2B is the section view of the contact arm, Fig. 2C is the three-dimensional view of the contact arm.
  • the contact arm for switch device comprises a main conductor 20 which is adapted to connect with a pole 29.
  • the main conductor 20 is solid and is made of aluminum or aluminum alloy.
  • the material and the structure of the main conductor are the prominent substantive features and represent a notable progress compared with the existing contact arm.
  • the main conductor made of aluminum or aluminum alloy greatly cuts the costs of the contact arm.
  • the main conductor made of aluminum or aluminum alloy is much lighter, this enables a better fastening with the pole and a longer service life of the circuit breakers.
  • the contact area between the main conductor 20 and the pole 29 greatly increased comparing with the generally used contact arm now.
  • the contact arm further comprises an anterior connect adaptor 21 at the tulip contact end of the main conductor 20 configured to connect with a tulip contact 22.
  • the other end of the main conductor 20 is fastened to the pole 29.
  • the anterior connect adaptor 21 is made of copper and it is connected with the main conductor 20 by a double start thread bolt 24.
  • the main conductor 20 is fastened to the pole by a double start thread bolt 23.
  • the anterior connect adaptor 21 comprises an internal screw thread 25 adapted to the double start thread bolt 24.
  • the pole 29 comprises an internal screw thread adapted to the double start thread bolt 23.
  • a hole 202 is provided in the main conductor 20 to facilitate the rotation of the main conductor 20 when fasten it to the pole 29.
  • Two parallel notches, such as the parallel notches 210 on the anterior connect adaptor 21 can also be used to facilitate the rotation of the main conductor 20 instead of the hole 202.
  • the threads of both parts are fine thread, which can improve tightness of the connection.
  • the bolt 23 also can be complete thread, the advantage is to reduce the hole diameter and then increase the contact surface to the pole 29.
  • the anterior connect adaptor 21 is connected with the main conductor 20 by a cylindrical protrusion.
  • the main conductor 20 is fastened to the pole by a cylindrical protrusion.
  • the anterior connect adaptor 21 and the main conductor 20 both comprise a concave part adapted to the cylindrical protrusion.
  • main conductor 20 is fastened to the pole 29 by a cylindrical protrusion.
  • the main conductor 20 is conical and the diameter of the main conductor is decreasing towards the tulip contact end.
  • the main conductor 20 can also be cylindrical.
  • the anterior connect adaptor 21 can also be made of aluminum or aluminum alloy and is an integral structure with the main conductor 20. But for big current application, it is better to be separated with two kinds of material to keep same withstand capability but get much cost saving.
  • the anterior connect adaptor 21 is silver plating.
  • the anterior connect adaptor 21 has a better thermal dissipation performance and conductivity.
  • Fig. 3 shows the structure of the contact arm of the present invention according to another preferred embodiment.
  • the contact arm 20 is cylindrical and the anterior connect adaptor 21 is made of aluminum or aluminum alloy and is an integral structure with the main conductor 20.
  • a plurality of heat elimination grooves 201 are provided on the surface of the main conductor 20 near the anterior connect adaptor end. The heat elimination grooves 201 can increase the heat dissipation performance.
  • Fig. 4 shows the contact arm is connected with the tulip contact 22.
  • the contact arm is connected to a tulip contact 22 via the anterior connect adaptor 21 .
  • the main conductor 20 is covered by insulating material except the concave part 25.
  • the insulating material 26 is to prevent high voltage arc between the main conductor 20 and the earthing parts.
  • the present invention provides a circuit breaker.
  • the circuit breaker comprises a pole 29 and a tulip contact 22 and a contact arm according to anyone of above.
  • the contact arm is fastened to the pole 29 at one end and contacted with the tulip contact 22 at the other end.
  • the bolt is fasted on the contact arm by glue to prevent loose.
  • the glue is used only at one end of the double start thread bolt 23. Since the other components of the circuit breaker are not the inventive points of this invention, they are described in details here.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

A contact arm for switch device is provided. The contact arm comprises a main conductor (20) which is solid and is made of aluminum or aluminum alloy. The main conductor (20) is connected with a tulip contact (22) by an anterior connect adaptor (21) at one end and is connected with a pole (29) at the other end. The main conductor (20) is connected with the anterior connect adaptor (21) and the pole (29) via a double start thread bolt (24). Thus, the main conductor (20) has a sufficient contact surface with the pole (29). The anterior connect adaptor (21) is made of copper and is silver plating. A plurality of heat elimination grooves (201) are provided on the surface of the main conductor (20) near the anterior connect adaptor (21) end. The heat elimination grooves (201) can increase the heat dissipation performance. The main conductor made of aluminum or aluminum alloy greatly cuts the costs of the contact arm. Furthermore, the main conductor made of aluminum or aluminum alloy is much lighter; this enables a better fastening with the pole and a longer service life of the circuit breakers.

Description

CONTACT ARM FOR SWITCH DEVICE AND CIRCUIT BREAKER THEREOF
FIELD OF THE INVENTION
This invention relates to the field of power products, and more particularly to a contact arm for the switch devices. BACKGROUND OF THE INVENTION
In general, a vacuum circuit breaker is a device for protecting an electric power system, in which a vacuum interrupter is made of an arc extinguishing material so as to deliberately perform power transmission, switching, termination and the like and fast perform an automatic blocking of the electric power system when any breakdown occurs. The vacuum circuit breaker serves to quickly break off a circuit by an arc extinguishing operation by which an arc product generated upon opening and closing a normal load and cutting off a fault current is rapidly dispersed within a vacuum container, thus to protect circuit and other equipment.
Such vacuum circuit breaker is provided with a main circuit section, a truck mechanism or a moving carriage, a cradle and an auxiliary element. The truck mechanism is integrally coupled to the main circuit section, and provided with a mechanical part which selectively moves the main circuit section to the cradle. The coupling or separation between the main circuit section and the cradle is allowed by a tulip contactor of the main circuit section and a cradle terminal of to the cradle. During operation in a state of the main circuit section being coupled to the cradle, a current is introduced into a vacuum interrupter installed inside the main circuit section via an upper terminal, and the introduced current is discharged via a lower terminal. During the operation, if any accident occurs, the vacuum interrupter instantaneously cuts off the current.
The tulip contactor is connected with a contact arm, and the contact arm is fastened to a pole. Fig. 1 shows the contact arm which is generally used now. Fig. 1 is the section view of the contact arm. The contact arm is hollow and is made of copper. The contact arm can meet the requirement of conductivity and heat dissipation. But the contact arm made of copper is very heavy and expensive. The heavy contact arm may make it fastness with the pole unsound, and in extreme cases the fastness between the contact arm and the pole may break off.
SUMMARY OF THE INVENTION
To overcome above mentioned shortcomings, the present invention provides a contact arm for switch device and the circuit breaker thereof.
According to one aspect of the present invention, a contact arm for switch device is provided. The contact arm comprises a main conductor which is adapted to connect with a pole. The main conductor is solid and is made of aluminum or aluminum alloy.
According to one preferred embodiment of the present invention, the contact arm further comprises an anterior connect adaptor at the tulip contact end of the main conductor configured to connect with a tulip contact.
According to one preferred embodiment of the present invention, the main conductor comprises a concave part at the pole end of the main conductor adapted to accommodate an external protrusion for connecting with the pole. The concave part can be a cylindrical hole or an internal screw thread adapted to connect with the pole by a bolt.
According to one preferred embodiment of the present invention, the main conductor is cylindrical or conical. And the diameter of the conical main conductor is decreasing towards the tulip contact end.
According to one preferred embodiment of the present invention, the contact arm further comprises a conductor protrusion configured to connect with the anterior connect adaptor. The conductor protrusion can be a bolt and preferably a double start thread bolt.
According to one preferred embodiment of the present invention, the anterior connect adaptor is made of copper.
According to another preferred embodiment of the present invention, the anterior connect adaptor is made of aluminum or aluminum alloy and is an integral structure with the main conductor.
According to one preferred embodiment of the present invention, the external surface of said anterior connect adaptor is silver plating.
According to one preferred embodiment of the present invention, the contact arm further comprises a tulip contact.
According to one preferred embodiment of the present invention, the main conductor is covered by insulating material except the concave part.
According to one preferred embodiment of the present invention, a plurality of heat elimination grooves are provided on the surface of the main conductor near the anterior connect adaptor end. The heat elimination grooves can increase the heat dissipation performance.
According to another aspect of the invention, a circuit breaker is provided. The circuit breaker comprises a pole, and a contact arm according to anyone of above. The contact arm is fastened to the pole.
According to one preferred embodiment of the present invention, in the circuit breaker, the contact arm is also fastened to the pole by glue. The contact arm of the present invention is much cheaper and much lighter. Thus the contact arm is more stable after fixed on the pole even after long use. The contact arm of the present invention greatly cuts the costs of the circuit breakers.
BRIEF DESCRIPTION OF THE DRAWINGS
The subject matter of the invention will be explained in more details in the following description with reference to preferred exemplary embodiments which are illustrated in the drawings, in which:
Fig. 1 is the section view of the contact arm which is generally used now;
Fig. 2A, 2B and 2C show the structure of the contact arm of the present invention; wherein, Fig. 2A is the exploded view of the contact arm, Fig. 2B is the section view of the contact arm, Fig. 2C is the three-dimensional view of the contact arm.
Fig. 3 shows the structure of the contact arm of the present invention according to another preferred embodiment;
Fig. 4 is the three-dimensional view of the contact arm with tulip contact;
Fig. 5 is the three-dimensional view of the contact arms fasten on the pole.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
With reference to the above-mentioned figures, preferred embodiments of the present invention are provided.
Fig. 2A, 2B and 2C show the structure of the contact arm of the present invention according to a preferred embodiment; wherein, Fig. 2A is the exploded view of the contact arm, Fig. 2B is the section view of the contact arm, Fig. 2C is the three-dimensional view of the contact arm. The contact arm for switch device comprises a main conductor 20 which is adapted to connect with a pole 29. The main conductor 20 is solid and is made of aluminum or aluminum alloy. The material and the structure of the main conductor are the prominent substantive features and represent a notable progress compared with the existing contact arm. The main conductor made of aluminum or aluminum alloy greatly cuts the costs of the contact arm. Furthermore, the main conductor made of aluminum or aluminum alloy is much lighter, this enables a better fastening with the pole and a longer service life of the circuit breakers. As shown in Fig. 2B, the contact area between the main conductor 20 and the pole 29 greatly increased comparing with the generally used contact arm now.
The contact arm further comprises an anterior connect adaptor 21 at the tulip contact end of the main conductor 20 configured to connect with a tulip contact 22. The other end of the main conductor 20 is fastened to the pole 29. According to a preferred embodiment of the present invention, the anterior connect adaptor 21 is made of copper and it is connected with the main conductor 20 by a double start thread bolt 24. The main conductor 20 is fastened to the pole by a double start thread bolt 23. The anterior connect adaptor 21 comprises an internal screw thread 25 adapted to the double start thread bolt 24. Similarly, the pole 29 comprises an internal screw thread adapted to the double start thread bolt 23.
As the main conductor 20 is cylindrical or conical, it is difficult to rotate. A hole 202 is provided in the main conductor 20 to facilitate the rotation of the main conductor 20 when fasten it to the pole 29. Two parallel notches, such as the parallel notches 210 on the anterior connect adaptor 21 , can also be used to facilitate the rotation of the main conductor 20 instead of the hole 202.
The threads of both parts are fine thread, which can improve tightness of the connection. The bolt 23 also can be complete thread, the advantage is to reduce the hole diameter and then increase the contact surface to the pole 29.
According to another preferred embodiment of the present invention, the anterior connect adaptor 21 is connected with the main conductor 20 by a cylindrical protrusion. The main conductor 20 is fastened to the pole by a cylindrical protrusion. The anterior connect adaptor 21 and the main conductor 20 both comprise a concave part adapted to the cylindrical protrusion. Similarly, main conductor 20 is fastened to the pole 29 by a cylindrical protrusion.
According to the preferred embodiment of the present invention, as shown in Fig. 2A- 2C, the main conductor 20 is conical and the diameter of the main conductor is decreasing towards the tulip contact end. In another preferred embodiment, the main conductor 20 can also be cylindrical.
The anterior connect adaptor 21 can also be made of aluminum or aluminum alloy and is an integral structure with the main conductor 20. But for big current application, it is better to be separated with two kinds of material to keep same withstand capability but get much cost saving.
According to the preferred embodiments of the present invention, the anterior connect adaptor 21 is silver plating. Thus, the anterior connect adaptor 21 has a better thermal dissipation performance and conductivity.
Fig. 3 shows the structure of the contact arm of the present invention according to another preferred embodiment. The contact arm 20 is cylindrical and the anterior connect adaptor 21 is made of aluminum or aluminum alloy and is an integral structure with the main conductor 20. A plurality of heat elimination grooves 201 are provided on the surface of the main conductor 20 near the anterior connect adaptor end. The heat elimination grooves 201 can increase the heat dissipation performance.
Fig. 4 shows the contact arm is connected with the tulip contact 22. The contact arm is connected to a tulip contact 22 via the anterior connect adaptor 21 . The main conductor 20 is covered by insulating material except the concave part 25. The insulating material 26 is to prevent high voltage arc between the main conductor 20 and the earthing parts.
In the other aspect, the present invention provides a circuit breaker. As shown in Fig. 5, the circuit breaker comprises a pole 29 and a tulip contact 22 and a contact arm according to anyone of above. The contact arm is fastened to the pole 29 at one end and contacted with the tulip contact 22 at the other end. The bolt is fasted on the contact arm by glue to prevent loose. To make sure the contact arm 20 and the pole 29 are demountable, the glue is used only at one end of the double start thread bolt 23. Since the other components of the circuit breaker are not the inventive points of this invention, they are described in details here.
Experiments have been done on the contact arm of the present invention. It performed well both in temperature rise experiment and short-time withstands current test experiment.
Though the present invention has been described on the basis of some preferred embodiments, those skilled in the art should appreciate that those embodiments should by no means limit the scope of the present invention. Without departing from the spirit and concept of the present invention, any variations and modifications to the embodiments should be within the apprehension of those with ordinary knowledge and skills in the art, and therefore fall in the scope of the present invention which is defined by the accompanied claims.

Claims

1 . A contact arm for switch device comprising a main conductor (20) which is adapted to connect with a pole (29), characterized in that said main conductor (20) is solid and is made of aluminum or aluminum alloy.
2. A contact arm according to claim 1 , characterized in that it further comprises an anterior connect adaptor (21) at the tulip contact end of the main conductor (20) configured to connect with a tulip contact (22).
3. A contact arm according to claim 1 , characterized in that the main conductor (20) comprises a concave part (25) at the pole end of the main conductor (20) adapted to accommodate an external protrusion (23) for connecting with the pole (29).
4. A contact arm according to claim 3, characterized in that said concave part is an internal screw thread (25) adapted to connect with the pole (29) by a bolt (23).
5. A contact arm according to any one of claims 1 -4, characterized in that the main conductor (20) is cylindrical.
6. A contact arm according to any one of claims 1 -4, characterized in that the main conductor (20) is conical and the diameter of the main conductor is decreasing towards the tulip contact end.
7. A contact arm according to claim 6, characterized in that it further comprises a conductor protrusion (24) configured to connect with the anterior connect adaptor (21).
8. A contact arm according to claim 7, characterized in that said conductor protrusion is a bolt and preferably a double start thread bolt (24).
9. A contact arm according to claim 2, characterized in that said anterior connect adaptor (21) is made of copper.
10. A contact arm according to claim 2, characterized in that said anterior connect adaptor (21) is made of aluminum or aluminum alloy and is an integral structure with the main conductor (20).
11 . A contact arm according to any one of claims 2, 9 or 10, characterized in that the external surface of said anterior connect adaptor (21) is silver plating.
12. A contact arm according to claim 11 , characterized in that it further comprises at least one heat elimination groove (201) on the surface of the main conductor (20) near the anterior connect adaptor (21) end.
13. A contact arm according to claim 6, characterized in that said main conductor (20) is covered by insulating layer (26) except the concave part (25).
14. A circuit breaker comprising a pole (29), characterized in that it comprises a contact arm according to any one of claims 1 -13, and the contact arm is fastened to the pole (29).
15. A circuit breaker according to claim 14, characterized in that the contact arm is also fastened to the pole (29) by glue.
PCT/CN2011/072918 2011-04-18 2011-04-18 Contact arm for switch device and circuit breaker thereof Ceased WO2012142739A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2011/072918 WO2012142739A1 (en) 2011-04-18 2011-04-18 Contact arm for switch device and circuit breaker thereof
CN201190001077.0U CN203983209U (en) 2011-04-18 2011-04-18 Contact arm for switching device and circuit breaker including the contact arm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/072918 WO2012142739A1 (en) 2011-04-18 2011-04-18 Contact arm for switch device and circuit breaker thereof

Publications (1)

Publication Number Publication Date
WO2012142739A1 true WO2012142739A1 (en) 2012-10-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/072918 Ceased WO2012142739A1 (en) 2011-04-18 2011-04-18 Contact arm for switch device and circuit breaker thereof

Country Status (2)

Country Link
CN (1) CN203983209U (en)
WO (1) WO2012142739A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105679593A (en) * 2016-03-31 2016-06-15 许昌永新电气股份有限公司 High-voltage vacuum circuit breaker pole
CN106816342A (en) * 2017-02-27 2017-06-09 厦门理工学院 A kind of VD4 contact arm sleeve for high-voltage vacuum circuit breaker
US10134553B2 (en) 2014-12-18 2018-11-20 Abb Schweiz Ag Contact arms for use in electrical switchgear and methods of fabricating same
US11056296B2 (en) 2019-11-20 2021-07-06 Eaton Intelligent Power Limited Circuit breaker using multiple connectors
EP4024634A3 (en) * 2020-12-29 2022-11-02 Schneider Electric USA, Inc. Enclosure and optimizations

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106783295B (en) * 2016-12-16 2019-02-01 天津平高智能电气有限公司 Contactor-fuse combination and its contact arm

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Publication number Priority date Publication date Assignee Title
JPH11265640A (en) * 1999-02-05 1999-09-28 Togami Electric Mfg Co Ltd Circuit breaker
CN101330174A (en) * 2008-07-15 2008-12-24 梁楚欣 Cuprum aluminum socket connector for conductivity as well as manufacturing method and use thereof
CN201230155Y (en) * 2008-07-14 2009-04-29 河南森源电气股份有限公司 Hand cart type grounding switch apparatus
CN201435311Y (en) * 2009-06-03 2010-03-31 福建省三星机电设备有限公司 Electric conduction contact arm of high voltage breaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11265640A (en) * 1999-02-05 1999-09-28 Togami Electric Mfg Co Ltd Circuit breaker
CN201230155Y (en) * 2008-07-14 2009-04-29 河南森源电气股份有限公司 Hand cart type grounding switch apparatus
CN101330174A (en) * 2008-07-15 2008-12-24 梁楚欣 Cuprum aluminum socket connector for conductivity as well as manufacturing method and use thereof
CN201435311Y (en) * 2009-06-03 2010-03-31 福建省三星机电设备有限公司 Electric conduction contact arm of high voltage breaker

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10134553B2 (en) 2014-12-18 2018-11-20 Abb Schweiz Ag Contact arms for use in electrical switchgear and methods of fabricating same
CN105679593A (en) * 2016-03-31 2016-06-15 许昌永新电气股份有限公司 High-voltage vacuum circuit breaker pole
CN106816342A (en) * 2017-02-27 2017-06-09 厦门理工学院 A kind of VD4 contact arm sleeve for high-voltage vacuum circuit breaker
CN106816342B (en) * 2017-02-27 2019-01-22 厦门理工学院 A VD4 high voltage vacuum circuit breaker contact arm cover
US11056296B2 (en) 2019-11-20 2021-07-06 Eaton Intelligent Power Limited Circuit breaker using multiple connectors
EP4024634A3 (en) * 2020-12-29 2022-11-02 Schneider Electric USA, Inc. Enclosure and optimizations
US12034241B2 (en) 2020-12-29 2024-07-09 Schneider Electric USA, Inc. Enclosure and optimizations

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