US20030112574A1 - Switchgear and receiving transformation apparatus using the same - Google Patents

Switchgear and receiving transformation apparatus using the same Download PDF

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Publication number
US20030112574A1
US20030112574A1 US10/294,688 US29468802A US2003112574A1 US 20030112574 A1 US20030112574 A1 US 20030112574A1 US 29468802 A US29468802 A US 29468802A US 2003112574 A1 US2003112574 A1 US 2003112574A1
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US
United States
Prior art keywords
primary
driving
circuit breaker
grounding
switch
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.)
Abandoned
Application number
US10/294,688
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English (en)
Inventor
Yoshiaki Inami
Koichi Nakano
Takashi Omori
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Assigned to HITACHI, LTD. reassignment HITACHI, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAKANO, KOICHI, INAMI, YOSHIAKI, OMORI, TAKASHI
Publication of US20030112574A1 publication Critical patent/US20030112574A1/en
Priority to US11/125,243 priority Critical patent/US7130172B2/en
Abandoned legal-status Critical Current

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    • 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
    • H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
    • 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
    • H01H33/02—Details
    • H01H33/46—Interlocking mechanisms
    • H01H33/52—Interlocking mechanisms for interlocking two or more switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches

Definitions

  • the present invention relates to a new switchgear and more particularly to a switchgear for a receiving transformation apparatus and a receiving transformation apparatus using it.
  • FIG. 1 shows a single wire connection diagram of a switchgear composed of a load switch, a circuit breaker, and a grounding switch.
  • the grounding switches on the primary and secondary sides of the load switch are used only at the time of inspection, so that as shown in FIG. 1, two grounding switches are mechanically connected and operated in connection with each other by one operation device.
  • an interlock must be provided so that they cannot be operated unless the primary and secondary grounding switches of the load switch are in an “Open” state.
  • an electrical interlock is separately provided, resulting in complication of the system and increasing in the cost.
  • an electrical interlock is used, in consideration of a case that the electrical interlock is not functioned as such at the time of loss of the control power of the system, there is a problem imposed in the reliability.
  • the present invention is intended to provide a switchgear capable of connecting and surely switching primary and secondary circuit breakers and grounding switches and a receiving transformation apparatus using it.
  • the present invention is intended to provide a switchgear capable of connecting and surely switching primary and secondary circuit breakers and grounding switches by one operation means and a receiving transformation apparatus using it.
  • the present invention is intended to provide a switchgear capable of connecting primary and secondary circuit breakers and grounding switches, providing a time difference between respective switching operations, and reducing the operation force and a receiving transformation apparatus using it.
  • the present invention is structured so as to connect 4 devices in total of primary and secondary circuit breakers and primary and secondary grounding switches of a load switch or a voltage and current transformer for an instrument by a mechanical connection means and operate them in connection with each other by one operation device.
  • the conventional 3 operation devices necessary for the circuit breakers and grounding switches are reduced to one device and the cost for 2 operation devices can be cut down.
  • the circuit breakers and grounding switches are mechanically connected and the circuit breakers and grounding switches are mechanically structured so as to prevent them from putting into a “closed” state at the same time, so that there is no need to separately provide an interlock between the circuit breakers and the grounding switches and the simplification of the system and the reliability of malfunction prevention can be enhanced. Further, sure switching can be executed in each operation.
  • the present invention relates to a switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on the primary side and secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the primary circuit breaker, and a secondary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the secondary circuit breaker, wherein the switchgear is mechanically structured so that the primary circuit breaker, secondary circuit breaker, primary grounding switch and secondary grounding switch are connected by a mechanical means, and they are connected to one operation device, and the 4 devices are all operated in connection with each other, and when the primary circuit breaker and secondary circuit breaker are in the “closed” state, the primary switch and secondary switch are in the “open” state, and when the primary grounding switch and secondary grounding switch are in the “closed” state, the primary circuit breaker and secondary circuit breaker are in the “open” state.
  • the switchgear is a one that for either one or both of the primary circuit breaker and grounding switch of the load switch or the voltage and current transformer for an instrument and the secondary circuit breaker and grounding switch of the load switch or the voltage and current transformer for an instrument, a three-position switch with circuit breakers and grounding switches integrated is adopted.
  • the present invention relates to a switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on the primary side and secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the primary circuit breaker, and a secondary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the secondary circuit breaker, wherein the switchgear has a drive structure for operating the primary and secondary circuit breakers and grounding switches in connection with each other, an operation device for driving the primary and secondary circuit breakers and grounding switches, and a driving device for driving the load switch or voltage and current transformer for an instrument independently of the operation device.
  • connection bars are respectively connected so as to move the moving electrodes of the circuit breakers and grounding switches and an operation device for operating the moving electrodes in connection with each other via the connection bars is provided.
  • the switchgear of the present invention has a drive structure for operating the primary and secondary circuit breakers and grounding switches in connection with each other and adjusting the start or end time of the operation and an operation device for driving the primary and secondary circuit breakers and grounding switches.
  • the present invention relates to a switchgear having circuit breakers and grounding switches, which has drive levers connected to the moving electrodes of the circuit breakers and grounding switches for driving the moving electrodes, drive shafts for driving the drive levers, a first relay lever for rotating the drive shafts in the axial direction thereof, a link rod for driving the first relay lever, a second relay lever for driving the link rod in the length direction, a relay shaft for driving the second relay lever, and an operation device for rotating the relay shafts and has a drive structure for driving the moving electrodes of the circuit breakers and grounding switches in connection with each other by rotation of the relay shafts.
  • the present invention in the same way as with the aforementioned, is a switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on the primary side and secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the primary circuit breaker, and a secondary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the secondary circuit breaker, wherein the switchgear has drive levers connected to the moving electrodes of the primary and secondary circuit breakers and primary and secondary grounding switches in the same way as with the aforementioned for driving the moving electrodes and a drive structure for driving the moving electrodes of the primary and secondary circuit breakers and primary and secondary grounding switches in connection with each other.
  • the present invention relates to a switchgear having circuit breakers and grounding switches, which has a three-position switching means for driving the fixed electrodes of the circuit breakers and grounding switches so as to freely switch, a drive lever for driving the three-position switching means, a drive shaft for driving the drive lever, a first relay lever for rotating the drive shaft in the axial direction thereof, a first link rod for driving the first relay lever, a second relay lever for driving the first link rod in the length direction, a relay shaft for driving the second relay lever, a third relay lever for rotating the relay shaft, a second link rod for driving the third relay lever, and an operation device for driving the second link rod in the length direction and has a drive structure for driving the moving electrodes of the circuit breakers and grounding switches in connection with each other by driving of the second link rod.
  • a switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on the primary side and secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the primary circuit breaker, and a secondary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the secondary circuit breaker is the same as the aforementioned.
  • the present invention relates to a switchgear having circuit breakers and grounding switches, which has a three-position switching means for driving the fixed electrodes of the circuit breakers and grounding switches so as to freely switch, a drive lever for driving the three-position switching means, a drive shaft for driving the drive lever, and an operation lever for rotating the drive shaft in the axial direction thereof and has a drive structure for driving the moving electrodes of the circuit breakers and grounding switches in connection with each other by driving of the operation lever.
  • the present invention in the same way as with the aforementioned, is a switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on the primary side and secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the primary circuit breaker, and a secondary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the secondary circuit breaker.
  • the present invention relates to a switchgear which can be set in any state of (1) to (3) indicated below. These settings switch the primary and secondary circuit breakers and grounding switches at the same time.
  • the primary and secondary circuit breakers or the primary and secondary grounding switches preferably make contact with each other or separate from each other with a time difference during switching.
  • the load switch or voltage and current transformer for an instrument of the present invention has a driving device for separating from the circuit and grounding at the time of test and inspection independently of the switching operation of the circuit breakers and grounding switches and by use of it, the operation time of the electrodes can be measured at the time of test and inspection.
  • FIG. 1 is a circuit diagram showing a conventional single wire connection
  • FIG. 2 is a circuit diagram showing the single wire connection of the present invention
  • FIG. 3 is a circuit diagram showing a single wire connection when a three-position switch is applied to FIG. 2,
  • FIG. 4 is a circuit diagram showing a single wire connection when the load switch shown in FIG. 3 is substituted for a voltage and current transformer for an instrument
  • FIG. 5 is a circuit diagram showing a single wire connection showing a receiving transformation apparatus structured by applying the present invention
  • FIG. 6 is a schematic view of a switchgear structured on the basis of the single wire connection diagram shown in FIG. 2,
  • FIG. 7 is a schematic view of a switchgear structured on the basis of the single wire connection diagram shown in FIG. 3, and
  • FIG. 8 is a schematic view of a switchgear structured on the basis of the single wire connection diagram shown in FIG. 4.
  • FIG. 6 is a schematic view of a switchgear having the operation device of the present invention structured on the basis of the single wire connection diagram shown in FIG. 2.
  • a circuit breaker 2 A is installed via a connection conductor 4 A and between the circuit breaker 2 A and the load switch 1 , a grounding switch 3 A is installed.
  • a circuit breaker 2 B is installed via a connection conductor 4 B.
  • the load switch 1 has a driving device for switching independently of switching of the circuit breakers 2 A and 2 B and the grounding switches 3 A and 3 B.
  • the electrode structure of the circuit breakers 2 A and 2 B and the grounding switches 3 A and 3 B is generally of a multi-band type or a tulip contact type, and the moving side thereof is in a bar shape, and the fixed side thereof is formed in a spring shape such as a multi-band or tulip shape and has a diameter smaller than that of the bar-shaped moving side, so that large force is required at the time of switching. Therefore, to perform a sure operation in switching, a mechanical connection means is necessary.
  • the respective circuit breakers 2 A and 2 B are switched by drive levers 7 A via insulation operation rods 5 .
  • the respective grounding switches 3 A and 3 B are switched by drive levers 7 B and can ground the circuits via grounding terminals 6 .
  • the drive levers 7 A and 7 B of the circuit breakers and grounding switches are respectively connected to drive shafts 8 A and 8 B and the drive shafts 8 A and 8 B are respectively connected to a relay shaft 10 via relay levers 9 and link rods 11 .
  • an operation device 12 is connected to the relay shaft 10 and the circuit breakers 2 A and 2 B and the grounding switches 3 A and 3 B, 4 units in total, can be switched by one operation device 12 .
  • circuit breakers 2 A and 2 B and the grounding switches 3 A and 3 B are respectively connected to the relay shaft 10 when the former is in the “closed” state and the latter is in the “open” state, so that when the circuit breakers 2 A and 2 B are in the “closed” state, the grounding switches 3 A and 3 B will not be in the “closed” state.
  • the circuit breakers 2 A and 2 B can be put into the “open” state and the grounding switches 3 A and 3 B can be put into the “closed” state.
  • the circuit breakers 2 A and 2 B will not be in the “closed” state. Therefore, malfunctions such as grounding a circuit under charging or connecting a circuit under grounding to a circuit under charging will not be caused mechanically and interlocks separately provided so as to prevent these conventional malfunctions are not required. Therefore, a system which is simpler and more reliable can be operated.
  • the switching operation requires large operation force and the units are mechanically interlocked with each other, so that it is preferable to provide a slight time difference in operation between the circuit breakers 2 A and 2 B beforehand.
  • This time difference enables intentionally shifting the contact time between the contacts of the circuit breakers 2 A and 2 B and reducing the operation force applied to the operation device 12 . By doing this, the contact positions are made slightly different.
  • circuit breakers and grounding switches can be surely switched highly reliably in a brief structure. Furthermore, in a device such as a load switch, when a circuit breaker for separating from the circuit at the time of test or inspection and a grounding switch for grounding the separated part are required, there is no need to separately install an interlock mechanism in each switch, and in the primary and secondary circuit breakers or grounding switches, an operation with a contact time difference provided can be performed, thus the operation force can be reduced.
  • FIG. 3 shows a single wire connection diagram when a three-position switch is adopted to each of the circuit breaker 2 A and grounding switch 3 A on the primary side of the load switch 1 and the circuit breaker 2 B and grounding switch 3 B on the secondary side thereof in the embodiment shown in FIG. 2.
  • FIG. 7 is a schematic view of a switchgear showing an embodiment of the present invention structured on the basis of the single wire connection diagram shown in FIG. 3.
  • a three-position switch 14 A composed of the circuit breaker 2 A and the grounding switch 3 A is installed so as to ground the side of the load switch 1 .
  • a three-position switch 14 B composed of the circuit breaker 2 B and the grounding switch 3 B is installed on the secondary side of the load switch 1 .
  • the load switch 1 has a driving device for switching independently of switching of the circuit breakers 2 A and 2 B and the grounding switches 3 A and 3 B.
  • the respective three-position switches 14 A and 14 B are operated by the drive levers 7 via the insulation operation rods 5 , and when the drive levers are operated counterclockwise in the drawing, the circuit breakers 2 A and 2 B are “closed”, and when they are operated clockwise, the grounding switches 3 A and 3 B are “closed”.
  • the drive levers 7 are respectively connected to the relay shaft 10 via the drive shafts 8 , the relay levers 9 , and the link rods 11 .
  • the relay shaft 10 is connected to the operation device 12 via the relay levers 9 A and the link rod 11 A, and the two three-position switches are operated by one operation device in connection with each other, thus the circuit breakers 2 A and 2 B and the grounding switches 3 A and 3 B can be operated in a batch.
  • the three-position switches 14 A and 14 B are respectively structured so as to prevent the circuit breakers and grounding switches from putting into the “closed” state at the same time and the drawing shows the circuit breakers 2 A and 2 B and the grounding switches 3 A and 3 B in the “open” state.
  • the circuit breakers 2 A and 2 B are put into the “closed” state and the grounding switches 3 A and 3 B are put into the “open” state and when the relay shaft 10 is rotated clockwise, the circuit breakers 2 A and 2 B are put into the “open” state and the grounding switches 3 A and 3 B are put into the “closed” state.
  • the electrode structure of the circuit breakers 2 A and 2 B and the grounding switches 3 A and 3 B in this embodiment is of a knife-edge type that two laminar moving electrodes are formed in a two-way, and force is applied to the opposite side by a spring, and the electrodes are held by the fixed laminar electrodes and make contact and in the same way as with Embodiment 1, large force is required for switching. Therefore, in the same way, the length of the connection means can be adjusted so as to operate the circuit breakers 2 A and 2 B and the grounding switches 3 A and 3 B with a time difference provided.
  • circuit breakers and grounding switches can be surely switched highly reliably in a brief structure. Furthermore, in a device such as a load switch, when a circuit breaker for separating from the circuit at the time of test or inspection and a grounding switch for grounding the separated part are required, there is no need to separately install an interlock mechanism in each switch, and in the primary and secondary circuit breakers or grounding switches, an operation with a contact time difference provided can be performed, thus the operation force can be reduced.
  • FIG. 4 shows a single wire connection diagram when the load switch 1 is substituted for the voltage and current transformer 13 for an instrument in the embodiment shown in FIG. 3.
  • a switchgear which is simpler, more low-priced and highly reliable can be structured.
  • FIG. 8 shows an embodiment structured on the basis of the single wire connection diagram shown in FIG. 4.
  • the switchgear has a constitution that on the primary and secondary sides of the voltage and current transformer for an instrument 13 , in the same way as the case shown in FIG. 7, the three-position switches 14 A and 14 B are installed and the drive shaft 8 common to the three-position switches 14 A and 14 B is directly operated. Also in this embodiment, in the same way as with the case shown in FIG. 7, low cost, simplification, and high reliability can be expected.
  • the voltage and current transformer for an instrument 13 is used to measure the electric energy.
  • FIG. 5 is a single wire connection diagram showing an example of a receiving transformation apparatus structured by using FIGS. 3 and 4 which is an embodiment of the present invention.
  • a switchgear which is low-priced and highly reliable can be supplied.
  • circuit breakers 2 A and 2 B and the grounding switches 3 A and 3 B can be operated with a time difference provided.
  • circuit breakers and grounding switches can be surely switched highly reliably in a brief structure. Furthermore, in a device such as a load switch, when a circuit breaker for separating from the circuit at the time of test or inspection and a grounding switch for grounding the separated part are required, there is no need to separately install an interlock mechanism in each switch, and in the primary and secondary circuit breakers or grounding switches, an operation with a contact time difference provided can be performed, thus the operation force can be reduced.
  • a switchgear having circuit breakers and grounding switches respectively on the primary and secondary sides of a device such as a load switch can be provided highly reliably in a brief structure. Furthermore, according to the present invention, in a device such as a load switch, when a circuit breaker for separating from the circuit at the time of test or inspection and a grounding switch for grounding the separated part are required, there is no need to separately install an interlock mechanism in each switch, and in the primary and secondary circuit breakers or grounding switches, an operation with a contact time difference provided can be performed, thus a switchgear capable of reducing the operation force and a receiving transformation apparatus using it can be provided.
US10/294,688 2001-12-12 2002-11-15 Switchgear and receiving transformation apparatus using the same Abandoned US20030112574A1 (en)

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Application Number Priority Date Filing Date Title
US11/125,243 US7130172B2 (en) 2001-12-12 2005-05-10 Switchgear and receiving transformation apparatus using the same

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JP2001-378506 2001-12-12
JP2001378506A JP4130735B2 (ja) 2001-12-12 2001-12-12 開閉装置及びそれを用いた受変電設備

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US11/125,243 Continuation US7130172B2 (en) 2001-12-12 2005-05-10 Switchgear and receiving transformation apparatus using the same

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US10/294,688 Abandoned US20030112574A1 (en) 2001-12-12 2002-11-15 Switchgear and receiving transformation apparatus using the same
US11/125,243 Expired - Lifetime US7130172B2 (en) 2001-12-12 2005-05-10 Switchgear and receiving transformation apparatus using the same

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US (2) US20030112574A1 (ja)
JP (1) JP4130735B2 (ja)
KR (1) KR20030051278A (ja)
CN (2) CN1681057A (ja)
TW (1) TWI248246B (ja)

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JP4666487B2 (ja) * 2005-09-06 2011-04-06 三菱電機株式会社 ガス絶縁開閉装置
FR2892225B1 (fr) * 2005-10-14 2008-09-12 Areva T & D Ag Sectionneur de terre et procede de fabrication d'un tel sectionneur de terre
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JP5114305B2 (ja) * 2008-06-16 2013-01-09 株式会社日立製作所 断路器
KR101008234B1 (ko) * 2008-12-01 2011-01-14 (주)제이씨파워 접지가 형성된 특별고압 수변전설비
US8248760B2 (en) * 2010-07-07 2012-08-21 Eaton Corporation Switch arrangement for an electrical switchgear
JP5921269B2 (ja) * 2012-03-14 2016-05-24 株式会社日立製作所 スイッチギヤ
KR101379158B1 (ko) * 2012-03-26 2014-04-02 현대중공업 주식회사 단로기 및 접지개폐기를 구비한 가스절연개폐장치의 계기용 변성기
CN106549328B (zh) * 2016-10-11 2018-10-02 河南平芝高压开关有限公司 一种集成式操作机构箱及使用该操作机构箱的开关设备
CN111064164B (zh) * 2019-11-12 2021-11-12 广东电网有限责任公司 一种双重保护箱式变电站
CN111044820A (zh) * 2019-12-19 2020-04-21 深圳供电局有限公司 变电站智能二次接口故障排除装置及方法
CN111916301B (zh) * 2020-07-30 2023-02-10 广东电网有限责任公司 调相电连接装置
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US20050201028A1 (en) 2005-09-15
JP2003189427A (ja) 2003-07-04
CN1426144A (zh) 2003-06-25
JP4130735B2 (ja) 2008-08-06
TWI248246B (en) 2006-01-21
CN1681057A (zh) 2005-10-12
CN1240168C (zh) 2006-02-01
KR20030051278A (ko) 2003-06-25
US7130172B2 (en) 2006-10-31
TW200301031A (en) 2003-06-16

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