US20030112574A1 - Switchgear and receiving transformation apparatus using the same - Google Patents
Switchgear and receiving transformation apparatus using the same Download PDFInfo
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- 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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- United States
- Prior art keywords
- primary
- driving
- circuit breaker
- grounding
- switch
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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
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- 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
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- 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.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
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 to the primary and secondary circuit breakers and grounding switches, connection means 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 included and a receiving transformation apparatus using it.
Description
- 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.
- A device such as a load switch for breaking a load current or a trouble current requires periodic maintenance, so that particularly for a class of device not lower than a high-voltage system, 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 generally installed. FIG. 1 shows a single wire connection diagram of a switchgear composed of a load switch, a circuit breaker, and a grounding switch. In the prior art, 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.
- In Japanese Utility Model Application Laid-open 6-74012, Japanese Patent Application Laid-Open No. Hei 08-214425, Japanese Patent Application Laid-Open No. Hei 09-28011, Japanese Patent Application Laid-Open No. Hei 09-74620, and Japanese Patent Application Laid-Open No. Hei 11-355926, a gas insulation switchgear that a circuit breaker operates in connection with a breaker is indicated.
- When a switchgear is structured by the conventional method as shown in FIG. 1, 3 operation devices in total must be installed for the primary circuit breaker of the load switch, the secondary circuit breaker of the load switch, and the primary and secondary grounding switches of the load switch and a problem arises that the cost is increased. Further, in the primary and secondary grounding switches of the load switch, in order to prevent the circuit in the hot-line state from grounding by mistake, an interlock must be separately provided so that they cannot be operated unless the primary circuit breaker of the load switch and the secondary circuit breaker of the load switch are in an “Open” state. Also in the primary circuit breaker of the load switch and the secondary circuit breaker of the load switch, 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. Conventionally, in those devices, an electrical interlock is separately provided, resulting in complication of the system and increasing in the cost. Further, since 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.
- Further, in the aforementioned patent applications, although the circuit breakers and grounding switches are driven in connection with each other, a specific driving means for operating the primary and secondary circuit breakers and grounding switches by one operation means is not indicated.
- 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.
- Further, 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.
- Furthermore, 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 connect4 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. By doing this, 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. Further, 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.
- In 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, to put the circuit breakers and grounding switches into an open or closed state which will be described later, to the primary and secondary circuit breakers and grounding switches, 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.
- Further, 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.
- Furthermore, 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.
- Further, 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.
- Also in the present invention, 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.
- Furthermore, 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.
- Further, 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.
- (1) When the circuit breakers are in the “closed” state, the grounding switches are in the “open” state.
- (2) When the circuit breakers are in the “open” state, the grounding switches are in the “open” state.
- (3) When the circuit breakers are in the “open” state, the grounding switches are in the “closed” state.
- Further, 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. On the primary side of a
load switch 1, acircuit breaker 2A is installed via aconnection conductor 4A and between thecircuit breaker 2A and theload switch 1, agrounding switch 3A is installed. In the same way, on the secondary side of theload switch 1, acircuit breaker 2B is installed via aconnection conductor 4B. Theload switch 1 has a driving device for switching independently of switching of thecircuit breakers grounding switches - The electrode structure of the
circuit breakers grounding switches - The
respective circuit breakers drive levers 7A viainsulation operation rods 5. And, therespective grounding switches drive levers 7B and can ground the circuits viagrounding terminals 6. - The drive levers7A and 7B of the circuit breakers and grounding switches are respectively connected to drive
shafts drive shafts relay shaft 10 viarelay levers 9 andlink rods 11. To therelay shaft 10, anoperation device 12 is connected and thecircuit breakers grounding switches operation device 12. - The
circuit breakers grounding switches relay shaft 10 when the former is in the “closed” state and the latter is in the “open” state, so that when thecircuit breakers grounding switches - Further, when the
relay shaft 10 is rotated counterclockwise in this state, thecircuit breakers grounding switches grounding switches circuit breakers - Further, as mentioned above, 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 circuit breakers operation device 12. By doing this, the contact positions are made slightly different. - According to this embodiment, on the primary and secondary sides of a device such as a load switch, 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 2A andgrounding switch 3A on the primary side of theload switch 1 and thecircuit breaker 2B andgrounding switch 3B 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. On the primary side of the
load switch 1, a three-position switch 14A composed of thecircuit breaker 2A and thegrounding switch 3A is installed so as to ground the side of theload switch 1. In the same way, on the secondary side of theload switch 1, a three-position switch 14B composed of thecircuit breaker 2B and thegrounding switch 3B is installed. Also in this embodiment, theload switch 1 has a driving device for switching independently of switching of thecircuit breakers - The respective three-
position switches insulation operation rods 5, and when the drive levers are operated counterclockwise in the drawing, thecircuit breakers relay shaft 10 via thedrive shafts 8, the relay levers 9, and thelink rods 11. Therelay shaft 10 is connected to theoperation device 12 via the relay levers 9A and thelink rod 11A, and the two three-position switches are operated by one operation device in connection with each other, thus thecircuit breakers - The three-
position switches circuit breakers relay shaft 10 is rotated counterclockwise in this state, thecircuit breakers relay shaft 10 is rotated clockwise, thecircuit breakers - The electrode structure of the
circuit breakers 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 thecircuit breakers - According to this embodiment, on the primary and secondary sides of a device such as a load switch, 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 andcurrent transformer 13 for an instrument in the embodiment shown in FIG. 3. As shown in the drawing, in a device requiring circuit breakers and grounding switches on the primary and secondary sides thereof for maintenance or test such as the voltage and current transformer for an instrument other than the load switch, by use of the present invention, 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 drive shaft 8 common to the three-position switches 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. By application of the present invention particularly in the field of receiving transformation apparatus as shown in this drawing, a switchgear which is low-priced and highly reliable can be supplied.
- Also in this embodiment, the
circuit breakers - According to this embodiment, on the primary and secondary sides of a device such as a load switch, 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.
- According to the present invention, 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.
Claims (10)
1. A switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on a primary side and a secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between said load switch or said voltage and current transformer for an instrument and said primary circuit breaker, and a secondary grounding switch arranged between said load switch or said voltage and current transformer for an instrument and said secondary circuit breaker, wherein to said primary and secondary circuit breakers and grounding switches, connection means are respectively connected so as to move moving electrodes of said circuit breakers and said grounding switches and said switchgear has an operation device for operating said moving electrodes in connection with each other via said connection means.
2. A switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on a primary side and a secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between said load switch or said voltage and current transformer for an instrument and said primary circuit breaker, and a secondary grounding switch arranged between said load switch or said voltage and current transformer for an instrument and said secondary circuit breaker, further comprising a drive structure for operating said primary and secondary circuit breakers and grounding switches in connection with each other, an operation device for driving said primary and secondary circuit breakers and grounding switches, and a driving device for driving said load switch independently of said operation device.
3. A switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on a primary side and a secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between said load switch or said voltage and current transformer for an instrument and said primary circuit breaker, and a secondary grounding switch arranged between said load switch and said secondary circuit breaker, wherein so that when said primary circuit breaker and said secondary circuit breaker are in a “closed” state, said primary switch and said secondary grounding switch are put into an “open” state, or when said primary grounding switch and said second grounding switch are in a “closed” state, said primary circuit breaker and said secondary circuit breaker are put into an “open” state, or when said primary circuit breaker and said secondary circuit breaker are in an “open” state, said primary grounding switch and said secondary grounding switch are put into an “open” state, to said primary and secondary circuit breakers and grounding switches, connection means are respectively connected so as to move moving electrodes of said circuit breakers and said grounding switches and said switchgear has an operation device for operating said moving electrodes in connection with each other via said connection means.
4. A switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on a primary side and a secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between said load switch or said voltage and current transformer for an instrument and said primary circuit breaker, and a secondary grounding switch arranged between said load switch and said secondary circuit breaker, further comprising a drive structure for operating said primary and secondary circuit breakers and grounding switches in connection with each other and adjusting a start or end time of said operation and an operation device for driving said primary and secondary circuit breakers and grounding switches.
5. A switchgear having circuit breakers and grounding switches, further comprising drive levers connected to moving electrodes of said circuit breakers and said grounding switches for driving said moving electrodes, drive shafts for driving said drive levers, a first relay lever for rotating said drive shafts in an axial direction of said drive shafts, a link rod for driving said first relay lever, a second relay lever for driving said link rod in a length direction, a relay shaft for driving said second relay lever, and an operation device for rotating said relay shafts and comprising a drive structure for driving said moving electrodes of said circuit breakers and said grounding switches in connection with each other by rotation of said relay shafts.
6. A switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on a primary side and a secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between said load switch or said voltage and current transformer for an instrument and said primary circuit breaker, and a secondary grounding switch arranged between said load switch and said secondary circuit breaker, further comprising drive levers connected to moving electrodes of said primary and secondary circuit breakers and said primary and secondary grounding switches for driving said moving electrodes, drive shafts for driving said drive levers, first relay levers for rotating said drive shafts in an axial direction of said drive shafts, link rods for driving said first relay levers, second relay levers for driving said link rods in a length direction, a relay shaft for driving said second relay levers, and an operation device for rotating said relay shaft and comprising a drive structure for driving said moving electrodes of said primary and secondary circuit breakers and said primary and secondary grounding switches in connection with each other by rotation of said relay shaft.
7. A switchgear having circuit breakers and grounding switches, comprising three-position switching means for driving fixed electrodes of said circuit breakers and said grounding switches so as to freely switch, a drive lever for driving said three-position switching means, a drive shaft for driving said drive lever, a first relay lever for rotating said drive shaft in an axial direction of said drive shaft, a first link rod for driving said first relay lever, a second relay lever for driving said first link rod in a length direction, a relay shaft for driving said second relay lever, a third relay lever for rotating said relay shaft, a second link rod for driving said third relay lever, and an operation device for driving said second link rod in a length direction and comprising a drive structure for driving moving electrodes of said circuit breakers and said grounding switches in connection with each other by driving of said second link rod.
8. A switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on a primary side and a secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between said load switch or said voltage and current transformer for an instrument and said primary circuit breaker, and a secondary grounding switch arranged between said load switch or said voltage and current transformer for an instrument and said secondary circuit breaker, comprising three-position switching means for driving fixed electrodes of said primary and secondary circuit breakers and said primary and secondary grounding switches so as to freely switch, a drive lever for driving said three-position switching means, a drive shaft for driving said drive lever, a first relay lever for rotating said drive shaft in an axial direction of said drive shaft, a first link rod for driving said first relay lever, a second relay lever for driving said first link rod in a length direction, a relay shaft for driving said second relay lever, a third relay lever for rotating said relay shaft, a second link rod for driving said third relay lever, and an operation device for driving said second link rod in a length direction and comprising a drive structure for driving moving electrodes of said primary and secondary circuit breakers and said primary and secondary grounding switches in connection with each other by driving of said second link rod.
9. A switchgear having circuit breakers and grounding switches, comprising three-position switching means for driving fixed electrodes of said circuit breakers and said grounding switches so as to freely switch, a drive lever for driving said three-position switching means, a drive shaft for driving said drive lever, and an operation lever for rotating said drive shaft in an axial direction of said drive shaft and comprising a drive structure for driving moving electrodes of said circuit breakers and said grounding switches in connection with each other by driving of said operation lever.
10. A switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on a primary side and a secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between said load switch or said voltage and current transformer for an instrument and said primary circuit breaker, and a secondary grounding switch arranged between said load switch or said voltage and current transformer for an instrument and said secondary circuit breaker, comprising three-position switching means for driving fixed electrodes of said primary and secondary circuit breakers and said primary and secondary grounding switches so as to freely switch, a drive lever for driving said three-position switching means, a drive shaft for driving said drive lever, and an operation lever for rotating said drive shaft in an axial direction of said drive shaft and comprising a drive structure for driving moving electrodes of said primary and secondary circuit breakers and said primary and secondary grounding switches in connection with each other by driving of said operation lever.
Priority Applications (1)
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 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001378506A JP4130735B2 (en) | 2001-12-12 | 2001-12-12 | Switchgear and receiving / transforming equipment using the same |
JP2001-378506 | 2001-12-12 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/125,243 Continuation US7130172B2 (en) | 2001-12-12 | 2005-05-10 | Switchgear and receiving transformation apparatus using the same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030112574A1 true US20030112574A1 (en) | 2003-06-19 |
Family
ID=19186211
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/125,243 Expired - Lifetime US7130172B2 (en) | 2001-12-12 | 2005-05-10 | Switchgear and receiving transformation apparatus using the same |
Country Status (5)
Country | Link |
---|---|
US (2) | US20030112574A1 (en) |
JP (1) | JP4130735B2 (en) |
KR (1) | KR20030051278A (en) |
CN (2) | CN1681057A (en) |
TW (1) | TWI248246B (en) |
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US7079367B1 (en) * | 1999-11-04 | 2006-07-18 | Abb Technology Ag | Electric plant and method and use in connection with such plant |
EP4006936A1 (en) * | 2020-11-30 | 2022-06-01 | ABB Schweiz AG | Switch device |
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KR100633762B1 (en) | 2004-10-21 | 2006-10-16 | 엘에스산전 주식회사 | ALTS Including Interlock Device for Preventing Switch Mechannism From Simultaneous Inputting to Load Circuit |
JP4666487B2 (en) * | 2005-09-06 | 2011-04-06 | 三菱電機株式会社 | Gas insulated switchgear |
FR2892225B1 (en) * | 2005-10-14 | 2008-09-12 | Areva T & D Ag | EAR DISCONNECT AND METHOD FOR MANUFACTURING SUCH EARTH DISCONNECT |
DE202006008709U1 (en) * | 2006-05-29 | 2006-08-17 | Siemens Ag | Connection switch panel e.g. circuit breaker panel, for medium voltage switch gear, has supply devices connected with bus branch over three position switches having contact, separation and grounding positions |
GB0614193D0 (en) | 2006-07-18 | 2006-08-23 | Martin Energy Ltd | Aggregated management system |
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JP5114305B2 (en) * | 2008-06-16 | 2013-01-09 | 株式会社日立製作所 | Disconnector |
KR101008234B1 (en) * | 2008-12-01 | 2011-01-14 | (주)제이씨파워 | Receive and change electricity equipment for special high-tension is ground formation |
US8248760B2 (en) * | 2010-07-07 | 2012-08-21 | Eaton Corporation | Switch arrangement for an electrical switchgear |
JP5921269B2 (en) * | 2012-03-14 | 2016-05-24 | 株式会社日立製作所 | Switchgear |
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CN106549328B (en) * | 2016-10-11 | 2018-10-02 | 河南平芝高压开关有限公司 | A kind of integrated form operating mechanism box and the switchgear using the operating mechanism box |
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US11476647B1 (en) * | 2021-04-22 | 2022-10-18 | Rockwell Automation Technologies, Inc. | Maintenance grounding device in motor control center with integrated interlock system |
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- 2002-11-15 US US10/294,688 patent/US20030112574A1/en not_active Abandoned
- 2002-11-29 CN CNA2005100726353A patent/CN1681057A/en active Pending
- 2002-11-29 CN CNB021526737A patent/CN1240168C/en not_active Expired - Fee Related
- 2002-12-11 KR KR1020020078782A patent/KR20030051278A/en not_active Application Discontinuation
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US11488790B2 (en) * | 2020-11-30 | 2022-11-01 | Abb Schweiz Ag | Switch device |
Also Published As
Publication number | Publication date |
---|---|
US7130172B2 (en) | 2006-10-31 |
CN1240168C (en) | 2006-02-01 |
TW200301031A (en) | 2003-06-16 |
CN1426144A (en) | 2003-06-25 |
TWI248246B (en) | 2006-01-21 |
CN1681057A (en) | 2005-10-12 |
JP4130735B2 (en) | 2008-08-06 |
KR20030051278A (en) | 2003-06-25 |
US20050201028A1 (en) | 2005-09-15 |
JP2003189427A (en) | 2003-07-04 |
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STCB | Information on status: application discontinuation |
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