EP2148348A1 - Switching apparatus - Google Patents
Switching apparatus Download PDFInfo
- Publication number
- EP2148348A1 EP2148348A1 EP09009513A EP09009513A EP2148348A1 EP 2148348 A1 EP2148348 A1 EP 2148348A1 EP 09009513 A EP09009513 A EP 09009513A EP 09009513 A EP09009513 A EP 09009513A EP 2148348 A1 EP2148348 A1 EP 2148348A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- operating
- shaft
- lever
- operating lever
- switching apparatus
- 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.)
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Classifications
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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
- H01H33/022—Details particular to three-phase circuit breakers
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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
- H01H33/42—Driving mechanisms
-
- 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
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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
- H01H33/60—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
- H01H33/666—Operating arrangements
- H01H33/6661—Combination with other type of switch, e.g. for load break switches
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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
- H01H33/60—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
- H01H33/666—Operating arrangements
- H01H2033/6667—Details concerning lever type driving rod arrangements
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
- The present invention relates to a switching apparatus for power distribution equipments or power transmission systems, and more particularly to a switching apparatus having a new operating device for operating main circuit switches and earthing switches.
- Conventional vacuum switching apparatuses are quipped with an operating device wherein an opening-closing lever crossing over an operator side, which has a closing coil for driving a closing rod in an axial direction thereof and a circuit breaker side having three vacuum valves for three phases is connected to the circuit breaker side and a shaft extending in a direction perpendicular to the axis of the closing rod. Thus, the three vacuum valves are operated in a synchronizing opening-closing operation. See patent document No. 1, for instance.
- The patent document No. 2 discloses a multi-circuit switching apparatus comprising a mechanical interlocking mechanism for limiting a swing action of a lever in a closing direction of a main circuit switch and an earthing switch, wherein a shaft extending in a horizontal direction is disposed above an operating rod between the main circuit switch and the earthing switch, two levers rotatably supported by the shaft, and two pins for connecting the operating rods of the switches with one ends of the levers (
Fig. 11 ). - It is necessary to dispose an interlocking mechanism for preventing closing operation of the switches when other switches are closed to the operating levers. For example, the interlocking mechanism comprises a link member connected to a pin and the lever, an interlock pin connected to one end of the link member, and a guide having an ellipse hole thereby moving the interlock pin up and down. When one of the switches is in a closed position, operation of the lever is impossible because of the interference of the interlock pin. Thus, the interlocking mechanism is very complicated. Therefore, a switching apparatus having a simplified interlocking mechanism has been desired.
- Patent document No. 1;
JP06-89646 - Patent document No. 2;
JP2006-59557 - Switching apparatuses for power distribution systems or power transmission systems are provided with earthing switches in order to secure safety at the time of inspection etc thereof, in addition to main circuit switches. Accordingly, the switching apparatuses have a lever device for operating the main circuit switches and a lever device for operating the earthing switches. Therefore, two support shafts for supporting the lever devices are needed.
- As a result, a space for installing the support shafts becomes large and the whole switching apparatuses become large in size.
- The present invention was made based upon the above fact, and it has an object to provide a switching apparatus provided with an operating device for main circuit switches and earthing switches for power use in three phases, which can be compact and simplified so that the whole switching apparatus can be made small in size.
- Therefore, it is an object of the present invention to provide a switching apparatus having a simplified operating device structure so that the switching apparatus can be made small in size.
- It is another object of the present invention to provide a switching apparatus having a simplified operating device with a simplified interlocking mechanism.
- In order to achieve the above object of the present invention, the present invention provides a switching apparatus comprising an operating device (1), a main circuit switch (4), and an earthing switch (5), which comprises:
- a common shaft (8);
- a first operating lever (6) connected to a movable electrode of the main circuit switch (4); and
- a second operating lever (7) connected to a movable electrode of the earthing switch (5) corresponding to the main circuit switch (4),
- According to the present invention, a structure of the lever devices can be simplified because the lever devices are rotatably supported around a single common shaft. As a result, the whole switching apparatus can be made small in size.
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Fig. 1 is a plan view of a switching apparatus provided with an operating device for main circuit switches and earthing switches of the present invention. -
Fig.2 is a top plan view of a unit of the operating device according to one embodiment. -
Fig. 3 is a cross sectional view of operating device along the line III inFig. 2 . -
Fig. 4 is a cross sectional view of the operating device along the line IV inFig. 2 . -
Figs. 5A to 5C show an assembling process of the operating device according to the one embodiment. -
Fig. 6 is a cross sectional view of an operating device of another embodiment in the same way ofFig. 4 . -
Figs. 7A and7B show an assembling process of part of the operating device of said another embodiment. -
Fig. 8 is a cross sectional view of an operating device of a still another embodiment. -
Fig. 9 is a plan view of an operating device of another embodiment of the present invention. -
Fig. 10 is a cross sectional view of the operating device along the line III inFig. 9 . -
Fig. 11 is a cross sectional view of the operating device along the line IV inFig. 9 . -
Figs. 12A to12C show an assembling process of the embodiment of the operating device. -
Fig. 13A shows a status of the operating device wherein all of main circuit switches and earthing switches are open. -
Fig. 13B shows a status of the operating device wherein the main circuit switches are closed and the earthing switches are open. -
Fig. 14 shows a movement of a swing-stopping member of the operating device of the present invention. -
Fig. 15 shows a plan view of another embodiment of the operating device. -
Fig. 16 is a cross sectional view of the operating device along the line XII inFig. 15 . -
Fig. 17 is a cross sectional view of the operating device along the line XIII inFig. 15 . -
Figs. 18A and 18B show an assembling process of the operating device of the present invention. -
Fig. 19 is a cross sectional view of the operating device of another embodiment. - The present invention provides following various improvements or modifications of the above-mentioned invention.
- The present invention provides a switching apparatus, wherein the first operating lever is connected to an operating rod of the main circuit switch, and the second operating lever is connected to an operating rod of the earthing switch.
- The invention further provides a switching apparatus, which comprises a desired number of units for desired number of phases, wherein each unit comprises the operating device, the main circuit switch and the earthing switch.
- The present invention provides a switching apparatus, wherein a plurality of main circuit switches are arranged right and left of the common shaft in a direction of the shaft length, and a plurality of the earthing switches are arranged left and right of the common shaft in the direction of the shaft length, the main circuit switches and the earthing switches are arranged alternately.
- The present invention further provides a switching apparatus, wherein the first operating lever comprises a pair of levers (6C) for holding the main circuit switch and a first shaft cover (6A) that covers the common shaft at one end of the first operating lever, and wherein each end of the levers (6C) has a connecting portion (10A) having a connecting hole (6B) for connecting to the operating rod (4).
- The present invention still further provides a switching apparatus, wherein the second operating lever comprises a pair of levers (7C) and a shaft cover (7A) for covering the common shaft at one end of each of the levers, and wherein the other end of each of the operating levers has a connecting portion (11A) having a hole (7B) for connecting to the operating rod of the main circuit switch.
- The present invention provides a switching apparatus, wherein the first shaft cover is connected in the direction of the shaft length via the first connecting member (6D).
- The present invention provides a switching apparatus, wherein the second shaft cover is connected in the direction of the shaft length via the second connecting portion (7D).
- The present invention further provides a switching apparatus, wherein a shaft support (9) is fixed to each end of the common shaft, and wherein the upper end and lower end of the common shaft are positioned by positioning members (6E, 7E) thereby to position the shaft supports, first shaft cover and second shaft cover. The positioning member may limit swing of the operating levers 6, 7 with respect to the
shaft 8. - The present invention provides a switching apparatus according to claim 1, wherein the first operating lever and the first connecting member, and the second operating lever and the second connecting member are united respectively.
- The present invention further provides a switching apparatus, wherein each of the first operating lever and the second operating lever has a semi-circular groove (61A1, 71A1) at one end thereof.
- The present invention provides a switching apparatus, wherein the other end of each of the first operating lever and the second operating lever is a hollow lever (71A), the hollow lever is inserted to cover a connected member of an inner lever (60A, 70A).
- The switching apparatus is composed of the apparatus according to combinations of two or more of the above-mentioned embodiments.
- In the following the present invention will be explained by reference to drawings.
- In
Fig. 1 there are three pairs of main circuit switches 4 for three phases and earthingswitches 5 each corresponding to each of the main circuit switches in thecasing 2 of the switching apparatus 1. -
First operating levers 6 for operating the main circuit switches 4 for three phases andsecond operating levers 7 for operating the earthing switches for three phases are arranged alternately along a shaft 8 (Fig. 2 ) and rotatably disposed coaxially on theshaft 8. The operating levers swing around theshaft 8. - A structure of the first operating lever and second operating lever will be explained in detail by reference to
Figs. 1 through 4 . - The
first operating levers 6 each comprises a plurality of shaft covers 6A (three, in this embodiment), levers 6C each being disposed at theshaft cover 7A in such a manner that thelever 6C interests the axis of theshaft cover 6A and having a connectinghole 7B at its end portion, first connectingmembers 6D disposed between thelevers 6C to mechanically connect thelever members 6C, and apositioning member 6E at one end of theshaft 8. - The
second operating member 7 has a similar structure to that of thefirst operating lever 6, which comprises a plurality of shaft covers 7A, levers 7C each being disposed between the shaft covers 6A in such a manner that thelever 7C interests the axis of theshaft cover 7A and having aconnection hole 7B at its end portion, second connectingmembers 7D disposed between thelevers 7C to mechanically connect thelever members 7C and apositioning member 7E at the other end of theshaft 8. Thepositioning members first operating levers 6 andsecond operating levers 7 towards thecommon shaft 8, as shown inFig. 4 . The end of thepositioning members shaft supporting members 9 in order to secure free movement of the operating members, 6, 7. -
Ends lever portions holes - The shaft supports 9 cover the
shaft 8 as shown inFig. 3 . The shaft cover6A, 7A are alternately stacked on thecommon shaft 8. - The
first operating lever 6 having thelever portion 6C andsecond operating lever 7 having thelever portion 7C are rotatably supported on thecommon shaft 8 though theshaft hole Fig. 4 . Thelever portions holes - The switching apparatus according to the present invention may be provided with a swing action limiting members (16E, 17E), which limit a swing action of the first operating lever (6) and/or the second operating lever (7) around the common shaft (8). The swing action limiting member limits swing action when the operating lever moves by a predetermined angle to prevent closing action of the switches.
- In the switching apparatus according to the present invention, the swing action limiting members (16E, 17E) each has a projection (16i, 17i) that touches the shaft cover (6A, 7A).
- In the switching apparatus according to the present invention, the swing action limiting member (16E, 17E) is disposed at one end of the lever portion.
- The
first operating lever 6 for the main circuit switches and thesecond operating lever 7 for the earthing switches are disposed alternately left and right sides along thecommon shaft 8. The both ends of thecommon shaft 8 are inserted into holes of shaft supports 9 and the shaft supports 9 are fixed to inside of thecasing 2 by means ofbolts 10, as shown inFig. 1 . - Each operating
lever 6C of thefirst operating levers 6 is connected to anoperating rod 4A of themain circuit switch 4 by means of apin shaft 11, as shown inFig. 1 . Each operatinglever 7C of the second operating levers 7 is connected to anoperating rod 5A of the earthingswitch 5 by means of apin shaft 12. Thefirst operating lever 6 and thesecond operating lever 7 are connected to an operator (not shown), which is located vertically above the switching apparatus shown inFig. 1 . Thefirst operating lever 6 and thesecond operating lever 7 may be united by forming them with casting. In this case, the inner face of holes of the shaft covers 6A, 7A of the first andsecond operating levers - Then, an assembly process of the operating device will be explained in detail by reference to
Figs. 5A to 5C and6 to 7 . - As shown in
Fig. 5A , thefirst operating lever 6 andsecond operating lever 7 have a similar structure, but are arranged in an opposite direction. - The shaft covers 7A of the
second operating lever 7 are inserted between the shaft covers 6A of thefirst operating lever 6 so that theshaft hole 7a of the shaft covers 7A of thesecond operating lever 7 and theshaft hole 6a of theshaft cover 6A of thefirst operating lever 6 are coincident. - The operating levers 6, 7 are assembled in back to back in the direction of an arrow, as shown in
Fig. 5A so that a straight shaft hole is formed among the operatinglevers common shaft 8 is inserted into theshaft holes first operating lever 6 andsecond operating lever 7 are united so that they are able to swing around thecommon shaft 8. - Then,
shaft supporting members 9 to both ends of thecommon shaft 8 as shown inFig. 5C . The operating devices thus assembled are fixed to the inside of thecasing 2 by means ofbolts 10 to install the operating devices in the casing. Three operating lever devices are installed for one three-phase switching apparatus. The operating device shown inFig. 5C may move in states shown inFigs. 13A and 13B . When the operating device moves into the state shown byFig. 13A , the main circuit switches and the earthing switches are open. On the other hand, when the operating device moves into the state shown byFig. 13B , the main circuit switches are closed and the earthing switches are open. - The
lever portions 6C of thefirst operating devices 6 installed in thecasing 2 are connected to operatingrods 4A of the main circuit switches 4 by means of thepin shafts 11. Thelever portion 7C of thesecond operating devices 7 installed in thecasing 2 are connected to operatingrods 5A by means of pin shafts. As a result, thefirst operating lever 6 and second operating lever 7in each phase are operated cooperatively to thereby operate the main circuit switches 4 and earthingswitches 5 of each phase synchronously. - According to the first embodiment described above, the structure of the operating levers can be simplified because the
first operating levers 6 for operating movable electrodes of the main circuit switches 4 and thesecond operating levers 7 for operating the movable electrodes of the earthing switches are arranged alternately and the end portions oflever portions second operating levers common shaft 8. As a result, the switching apparatus can be further downsized. - The
first operating lever 6 andsecond operating lever 7 have the same structure, and they can be manufactured by casting alloy with the same mold so that the production cost can be reduced and number of parts can be reduced. - Further, since the distance in the axial direction of the shaft between the shaft covers 6A of the
first operating levers 6 and the shaft covers 7A of thesecond operating levers 7 are secured, impact resistance of the operating device is secured. - If the
first operating lever 6 and thesecond operating lever 7 are united in a casting, deformation or deviation in distance among the levers, etc becomes small so that assembling of the parts is easy. -
Fig. 6 shows a cross sectional view of the operating device of another embodiment of the present invention.Figs. 7A and7B show an assembling process of the operating device. - In this embodiment, the top plan view of the operating device is the same as shown in
Fig. 2 and the cross sectional view of the operating device along the common shaft is the same as shown inFig. 3 . - In this embodiment shaft covers 6A and
lever portions 6C of thefirst operating lever 6 and shaft covers 7A andlever portions 7C of thesecond operating levers 7 are composed of two parts. As shown inFig. 6 ,inner lever portions outer lever portions outer lever portion 71A, as well as 61A has the structure shown inFig. 7A , and theinner lever portions 70A have the structure shown inFig. 7A . Theinner lever portion 60A has the same structure as that of theinner lever portion 70A. - The
inner lever portions inner lever 70A and theouter lever 71A. - The
outer lever portions inner lever portions lever outer lever portions inner lever portion outer lever portions - In this embodiment, as shown in
Figs. 7A and7B , theouter lever portion inner lever portions member 7D by a predetermined distance, in a direction of the arrow. Thus, the operating lever devices can be assembles. Advantages of this embodiment are that machining of the inner faces of the connecting holes can be conducted easily. Although, only thesecond operating lever 7 is shown inFigs. 7A and7B , thefirst operating lever 6 can be assembled as in the second operating lever. - After the assembling of the first and second operating levers in the above process, the first and second operating levers are united by inserting a common shaft through the hole and shaft supports 9 are fixed to the both ends of the
shaft 8. The assembled first and second operating levers are fixed to thecasing 2 of the switching apparatus 1. - In this embodiment, the advantages mentioned above with respect to the second embodiment are expected. That is, it is possible to conduct mechanical work of the inner faces of the semi-circular grooves 60A3, 70A3 of the shaft covers 60A4, 70A4.
- There is shown another embodiment in
Fig. 8 wherein shaft covers 6A, 7A of thefirst operating lever 6 andsecond operating lever 7 and thelever portions Outer lever portions inner lever portions Fig. 8 . - According to this embodiment, almost the same advantages as those of the above-mentioned embodiments are expected. That is, it is possible to conduct machine the inner surfaces of the holes formed in the end portions of the
outer levers inner levers - In the above embodiments, a size of the shaft covers 6A, 7A in a direction of the shaft of the
first operating levers 6 and the second operating levers 7 is the same as that of thelever portions lever portions - Although in the above-described embodiments the
positioning members second operating levers - In the following embodiments the swing action limiting member has a function for prohibiting a swing action of the operating levers around the shaft with respect to the other operating lever. As a result, an interlock mechanism of the switching apparatus can be simplified and the number of parts of the operating device can be reduced.
- A plan view of the switching apparatus according to this embodiment is omitted because the structure of the plan view thereof is the same as that of
Fig. 1 . - The plan view of one operating device of this embodiment is shown in
Fig. 9 , wherein the main parts are the same as those inFig. 2 except the swingaction limiting members Fig. 9 is shown inFig. 10 , wherein the swingaction limiting members shaft 8. The swingaction limiting members Figs. 10 and11 . The projected portions are shown as projects (curved portions) 16i, 17i. The swing action limiting member is compose of astraight portion 16h andcurved portion 16i. The swingaction limiting member 16E is fixed to thesecond operating lever 7 and the swingaction limiting member 17E is fixed to the operatinglever 6. The swing action limiting members cover part of the outer peripheries of the shaft covers of thelevers projects Fig. 11 so that the swing of one of the operating levers 6, 7 is limited with respect to the other operating lever. - The
second operating lever 7 has the same structure as that of thefirst operating lever 6. - The
first operating lever 6 and thesecond operating lever 7 are alternately stacked along thecommon shaft 8, as shown inFig. 10 , wherein theshaft cover portions shaft holes shaft 8 is inserted are stacked. -
Figs. 12A ,12B and 12C show an assembling process of the operating device of this embodiment. At first, thefirst operating lever 6 havingfirst levers 6C connected by connectingmembers 6D is provided with the swingaction limiting member 16E at one end thereof. Thesecond operating lever 7 havingsecond levers 7C connected by connectingmembers 7D is provided with the swingaction limiting member 17E at one end thereof. - The swing
action limiting member 6E has a curved portion and a straight portion to cover the surface of theshaft cover 7A, and thepositioning ember 7E has a curved shape to cover the surface of theshaft cover 6A. Theshaft cover portion 6g is inserted into therecess 7f of thesecond operating lever 7, and theshaft cover portion 7g is inserted into therecess 6f of thefirst operating lever 6 to constitute the operating device as shown inFig. 12B . - The shaft covers 6A are inserted into the gaps between the shaft covers 7A of the
second operating lever 7 and the shaft covers 7A are inserted into the gaps between the shaft covers 6A of thefirst operating lever 6, as shown in an arrow inFig. 12A . Then, the first andsecond operating levers Fig. 12A and combined to make theshaft hole - The
shaft 8 is inserted into thecommon shaft hole Fig. 12B . Thus, thefirst operating lever 6 and thesecond operating lever 7 are supported by thecommon shaft 8 being able to swing around the shaft. - Thereafter, as shown in
Fig. 12C , shaft supports 9 are fixed to both ends of thecommon shaft 8 to constitute a unit operating device, and three units of the operating devices are installed in thecasing 2 side by side by means ofbolts 10 as shown inFig. 1 to constitute the three phase switching apparatus of the present invention. -
Fig. 13A shows a perspective view of the unit of the operating device, which indicates a status where the main circuit switches and the earthing switches are open.Fig. 13B shows a perspective view of the unit of the operating device, which indicates a status where the main circuit switches are open and the earthing switches are closed. -
Fig. 14 is a diagram showing a movement of thelevers action limiting member 16E. The swingaction limiting member 16E limits a swing action of thelevers common shaft 8. Operation of the swingaction limiting member 16E will be explained in detail later. - The
lever portion 6C of thefirst operating lever 6 installed in thecasing 2 is connected to theoperating rod 4A of themain circuit switch 4 by means of thepin 11. Thelever portion 7C of thesecond operating lever 7 is connected to theoperating rod 5A by means ofpin 12. As a result, thefirst operating levers 6 and thesecond operating levers 7 of the respective phases move synchronously to thereby operate the main circuit switches 4 and the earthingswitches 5 altogether in three phases. -
Fig. 13A shows a status that all theswitches lever portion 6C of thefirst operating lever 6 and thelever portion 7C of thesecond operating lever 7 is about 180 degrees as shown inFig. 11 . - The
projection 16i of the swingaction limiting member 16E of thefirst operating lever 6 is located with a gap around the periphery of theshaft cover 7A of thesecond operating lever 7. Similarly, theprojection 17i of the swingaction limiting member 16E of thesecond operating lever 7 is located with a gap around the periphery of theshaft cover 6A of thesecond operating lever 6. -
Fig. 13B shows a perspective view of the operating device wherein the main circuit switches 4 are open and the earthingswitches 5 are closed. An angle constituted by thelever portion 6C of thefirst operating lever 6 and thelever portion 7C of thesecond operating lever 7 is over 180 degrees, wherein thelever portion 6C of thefirst operating lever 6 and theoperating rod 4A are pressed down to connect a movable contact and a fixed contact of a main circuit switch. The angle is decided in accordance with the gap between the movable contact and the fixed contact of themain circuit switch 4. - As shown in
Fig. 13B , if thelever portion 6C of thefirst operating lever 6 swings in an anticlockwise direction, the tip of theprojection 16i of the swingaction limiting member 16E (swing movement limiting member in this embodiment) contacts with the outer periphery of theshaft cover 7A of thesecond operating lever 7 and the swingaction limiting member 16E limits movement of thesecond operating lever 7 for operating the earthing switches in a clockwise direction. Similarly, the tip of theprojection 17i of the swingaction limiting member 17E (swing limiting member in this embodiment) contacts with the outer periphery of theshaft cover 6A of thefirst operating lever 6 and limits movement of thesecond operating lever 7 for operating the earthing switches in a clockwise direction. Thus, the closing operation of the earthingswitches 5 is locked. - When the main circuit switches 4 are open and the earthing
switches 5 are closed, the tip of theprojection 16i of the swingaction limiting member 16E of thefirst operating lever 6 contacts with the outer periphery of theshaft cover 7A of thesecond operating lever 7 to thereby the swingaction limiting member 16E limits a swing action of thefirst operating lever 6 for operating the main circuit switches 5. - Similarly, the tip of the
projection 17i of the swingaction limiting member 17E of thesecond operating lever 7 contacts with the outer periphery of theshaft cover 6A of thefirst operating lever 6 to thereby limit a swing action of thefirst operating lever 6 for operating the main circuit switches 4 in a clockwise direction. As a result, the closing operation of the main circuit switches 4 is locked. - Relationships between a length of the
projection 16i of the swingaction limiting member 16E and a swing angle of thefirst operating lever 6 will be explained by reference toFig. 14 . -
Fig. 14 is a side view of the operating device shown inFig. 13A in solid lines, and a side view of the operating device shown inFig. 13B is shown in dotted lines. InFig. 10 , L is a length of thelever portion 6C, which is a length between the center of the connectinghole 6B and the center of theshaft hole 6a. θ is a swing angle of thefirst operating lever 6, which is a swing angle from the vertical line in the center of theshaft hole 6a at the time when the tip of theprojection 16i contacts with the outer periphery of theshaft cover 7A of thesecond operating lever 7. x is a moving distance of thefirst operating lever 6 in up and down directions, which corresponds to the gap between the movable contact and the fixed contact of the main circuit switches. -
- The symbol x is determined by the gap between the movable contact and the fixed contact, and the swing angle θ is determined by the length L of the
lever portion 6C of thefirst operating lever 6. Accordingly, the length L should be such that the tip of theprojection 16i of the swingaction limiting member 16E touches the outer periphery of theshaft cover 7A of thesecond operating lever 7, when thefirst operating lever 6 swings by the swing angle θ. AlthoughFig. 14 shows only the swingaction limiting member 16E of thefirst operating lever 6, the swingaction limiting member 17E having theprojection 17i is formed in the same way as of the swingaction limiting member 16E. - As explained above, though it is necessary to change the swing angles of the
lever portions second operating levers switches lever portions projections action limiting members - According to the above embodiment, the number of the parts of the operating device will be reduced because an additional interlock mechanism for the main circuit switches and earthing switches, which is necessary for securing safety of the switching apparatus in case of the previous embodiments whose swing action limiting member has no swing limiting function.
- Since it is possible to easily change the swing angle θ of the operating levers 6, 7 by adjusting the length of the
tong form projections action limiting members - Further, the
first operating lever 6 and thesecond operating lever 7 have the same structure, and hence they can be produced by using the same casting mold, thereby to reducing production cost. - If the
first operating lever 6 and the second operating lever are united as a casting, deformation of the operating device can be minimized, and assembling of the switching apparatus becomes easy. -
Figs. 15 ,16 ,17 ,18A, 18B and 19 show another embodiment.Fig. 15 is a plan view of one unit of the operating device, which corresponds toFig. 2 . This embodiment corresponds to that shown inFigs. 7A ,7B . -
Fig. 16 is a cross sectional view along the line XII inFig. 15 , which corresponds toFig. 3 . The swing action limiting member (swing movement limiting member) 16E, 17E hasprojections Fig. 16 . -
Fig. 17 is a cross sectional view along the line XIII inFig. 15 . Since the shaft covers 6A, 7A of thefirst operating lever 6 and thesecond operating lever 7 are constituted by two parts, i.e.inner lever portions outer lever portions - The
inner lever portions inner lever portions - The
outer lever portions inner lever portions Figs. 18A and 18B . Theouter lever portions lever portion outer lever portions first operating lever 6 and thesecond operating lever 7. - In this embodiment, the
inner lever portions 70A are connected with connectingmembers 7D. Anouter lever portions 71A are outer-inserted to the inner lever portions as shown inFig. 18B to constitute thesecond operating lever 7. Thefirst operating lever 6 is constituted by the same manner as shown inFigs. 18A and 18B . After preparation of the first andsecond operating levers Figs. 5A and12A , and the shaft cover portions of thefirst operating member 6 are inserted into between the shaft cover portions of the second operating lever as shown inFigs. 5B and12B . Then, thecommon shaft 8 is inserted into the shaft hole as shown inFigs. 5B and12B . Thereafter, the shaft supports 9 are fixed to both ends of theshaft 8 as shown inFigs. 5C and12C . - After the units of the operating devices are prepared, they are installed in the
casing 2 by means ofpins 10 as shown inFig. 1 . - In this embodiment, the advantages of the previous embodiments are expected. Further, in this embodiment, the machining of the inner faces of the semi-circular grooves 60A1, 70A1, 60A3, 70A3 are conducted very easily.
- As another example wherein the shaft covers 6C, 7C and the
lever portions second operating levers Fig. 19 . This embodiment corresponds toFig. 8 . The operating device is composed of theinner lever portions outer lever portions inner lever portions - According to this embodiment, the same advantages of the embodiment shown in
Fig8 . The machining of the inner faces of the grooves of the outer lever portions and the inner lever portions is easily conducted. - In this embodiment, the swing
action limiting member lever portion Figs. 2 ,9 ,15 . However, the swing action limiting members can be disposed inside of thelever portions action limiting members second operating levers - The
tong form projections action limiting member shaft hole 6a, but the circular plate may be substituted with a L-shape plate that covers the shaft covers. The L-shaped plate may have tips of theprojections
Claims (15)
- A switching apparatus comprising an operating device (1), a main circuit switch (4), and an earthing switch (5), which comprises:a common shaft (8);a first operating lever (6) connected to a movable electrode of the main circuit switch (4); anda second operating lever (7) connected to a movable electrode of the earthing switch (5) corresponding to the main circuit switch (4),characterized in that the first and second operating levers are united and stacked around the common shaft alternately, and the operating levers are being able to swing around the common shaft.
- The switching apparatus according to claim 1, wherein the first operating lever is connected to an operating rod of the main circuit switch, and the second operating lever is connected to an operating rod of the earthing switch.
- The switching apparatus according to claim 1 or 2, which comprises a desired number of units for desired number of phases, wherein each unit comprises the operating device, the main circuit switch and the earthing switch.
- The switching apparatus according to any of claims 1 to 3, wherein a plurality of main circuit switches are arranged right and left of the common shaft in a direction of the shaft length, and a plurality of the earthing switches are arranged left and right of the common shaft in the direction of the shaft length, the main circuit switches and the earthing switches are arranged alternately.
- The switching apparatus according to any of claims 1 to 4, wherein the first operating lever comprises a pair of levers (6C) for holding the main circuit switch and a first shaft cover (6A) that covers the common shaft at one end of the first operating lever, and wherein each end of the levers (6C) has a connecting portion (10A) having a connecting hole (6B) for connecting to the operating rod (4).
- The switching apparatus according to any of claims 1 to 5, wherein the second operating lever comprises a pair of levers (7C) and a shaft cover (7A) for covering the common shaft at one end of each of the levers, and wherein the other end of each of the operating levers has a connecting portion (11A) having a hole (7B) for connecting to the operating rod of the main circuit switch.
- The switching apparatus according to claim 5, wherein the first shaft cover is connected in the direction of the shaft length via the first connecting portion (6D).
- The switching apparatus according to claim 6, wherein the second shaft cover is connected in the direction of the shaft length via the second connecting portion (7D).
- The switching apparatus according to any of claims 1 to 8, wherein a shaft support (9) is fixed to each end of the common shaft, and wherein the upper end and lower end of the common shaft are positioned by positioning members (6E, 7E) thereby to position the shaft supports, first shaft cover and second shaft cover.
- The switching apparatus according to any of claims 1 to 9, wherein the first operating lever and the first connecting member, and the second operating lever and the second connecting member are united respectively.
- The switching apparatus according to any of claims 1 to 10, wherein each of the first operating lever and the second operating lever has a semi-circular groove (61A1, 71A1) at one end thereof.
- The switching apparatus according to claim 11, wherein the other end of each of the first operating lever and the second operating lever is a hollow lever (71A), the hollow lever is inserted to cover a connected member of an inner lever (60A, 70A).
- The switching apparatus according to any of claims 1 to 12, which further comprises a positioning member (16E, 17E), which limits a swing movement of the first operating lever (6) or the second operating lever (7) around the common shaft (8).
- The switching apparatus according to claim 13, wherein
the positioning member (16E, 17E) has a projection (16i, 17i) that touches the shaft cover (6A, 7A), and/or
the positioning ember (16E, 17E) is disposed at one end of the lever portion, and/or
the swing action limiting member is disposed to the side of the lever portion at the end of the operating device, and/or
the swing action limiting member has a straight portion and a curved portion to cover part of an outer periphery of the shaft cover, and/or
the swing action limiting member has a projection that touches the outer periphery of the shaft cover when the operating lever rotates by a predetermined angle, and/or
the curved portion of the swing action limiting member has the same radius of curvature as that of the shaft cover, the center of the curved member being the same as that of the shaft, and/or
the swing action limiting member is composed of two plates to constitute L-form for covering part of the outer periphery of the shaft cover. - The switching apparatus according to any of claims 1 to 14, wherein the first operating lever is connected to the movable contact via an operating rod and the second operating lever is connected to the movable contact via another operating rod.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008189051A JP4611408B2 (en) | 2008-07-22 | 2008-07-22 | Switch operating device |
JP2009088991A JP5189544B2 (en) | 2009-04-01 | 2009-04-01 | Switch operating device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2148348A1 true EP2148348A1 (en) | 2010-01-27 |
EP2148348B1 EP2148348B1 (en) | 2014-04-23 |
Family
ID=41172315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09009513.4A Not-in-force EP2148348B1 (en) | 2008-07-22 | 2009-07-22 | Switching apparatus |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2148348B1 (en) |
KR (1) | KR101486438B1 (en) |
HK (1) | HK1137851A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3594524A (en) * | 1970-02-09 | 1971-07-20 | Gen Electric | Vacuum-type electric circuit breaker |
JPH0689646A (en) | 1992-09-10 | 1994-03-29 | Fuji Electric Co Ltd | Operating mechanism for circuit breaker |
EP1619708A2 (en) * | 2004-07-23 | 2006-01-25 | Hitachi, Ltd. | Electromagnetic operation device |
EP1628315A2 (en) * | 2004-08-17 | 2006-02-22 | Hitachi, Ltd. | Vacuum insulated switchgear |
EP1909302A1 (en) * | 2006-10-06 | 2008-04-09 | ABB S.p.A. | A low-voltage circuit breaker with sealed interchangeable poles. |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1117629A (en) * | 1997-06-24 | 1999-01-22 | Nec Corp | Fault detection circuit for receiver |
JPH1140012A (en) * | 1997-07-15 | 1999-02-12 | Toshiba Corp | Operation mechanism of switch |
-
2009
- 2009-07-21 KR KR20090066285A patent/KR101486438B1/en not_active IP Right Cessation
- 2009-07-22 EP EP09009513.4A patent/EP2148348B1/en not_active Not-in-force
-
2010
- 2010-04-19 HK HK10103761.9A patent/HK1137851A1/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3594524A (en) * | 1970-02-09 | 1971-07-20 | Gen Electric | Vacuum-type electric circuit breaker |
JPH0689646A (en) | 1992-09-10 | 1994-03-29 | Fuji Electric Co Ltd | Operating mechanism for circuit breaker |
EP1619708A2 (en) * | 2004-07-23 | 2006-01-25 | Hitachi, Ltd. | Electromagnetic operation device |
EP1628315A2 (en) * | 2004-08-17 | 2006-02-22 | Hitachi, Ltd. | Vacuum insulated switchgear |
JP2006059557A (en) | 2004-08-17 | 2006-03-02 | Hitachi Ltd | Single phase module of vacuum switchgear, and vacuum switchgear |
EP1909302A1 (en) * | 2006-10-06 | 2008-04-09 | ABB S.p.A. | A low-voltage circuit breaker with sealed interchangeable poles. |
Also Published As
Publication number | Publication date |
---|---|
KR101486438B1 (en) | 2015-01-26 |
HK1137851A1 (en) | 2010-08-06 |
EP2148348B1 (en) | 2014-04-23 |
KR20100010488A (en) | 2010-02-01 |
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