JP6628590B2 - Switchgear - Google Patents

Description

  The present invention relates to a switchgear, and particularly to a device for arranging a bushing used for insulating a switchgear from a switchgear housing or a partition plate.

In the case of a switchgear used by a customer to receive power from an electric power company, if there is a requirement to isolate the switchgear for each compartment, an electric path (conductor) passing through the compartment is insulated from a grounded switchgear housing or partition plate. To do so, a bushing is used.
FIGS. 1 and 10 of Patent Document 1 show an example of a switchgear that uses a bushing as a means for supporting an electric circuit (conductor) for fitting with a terminal of a draw-out circuit breaker and for insulating the electric circuit (conductor). Are disclosed.

Patent No. 3240807

  The bushing for insulating an electric circuit (conductor) for fitting with the terminal of the draw-out circuit breaker is provided with a distance between the terminals of the circuit breaker (distance between adjacent terminals in the left-right direction, see FIG. 1 of the drawings of the present invention). ) And the distance between the poles (the distance between the upper and lower terminals, see FIG. 1), the shape is determined. Therefore, when the specifications of the circuit breaker such as the rated breaking current, the rated current, and the rated voltage are different, the shape of the bushing needs to be changed according to the outer shape of the circuit breaker.

Usually, the bushing is manufactured by molding or casting a solid insulator made of a thermosetting resin such as epoxy or BMC (Bulk Molding Compound). When the type of bushings to be manufactured increases, in addition to the increase in capital investment such as molds, the productivity decreases and the bushing costs increase.
In the above-mentioned Patent Document 1, sharing of a bushing is not particularly considered.

Switch gear according to the present invention, provided with the terminal opening the terminal conductors of the three phases to be arranged is penetrated, with a conductive support member for supporting and insulated from each other and the terminal conductors, the conductor support the switchgear used side by side member up and down, the distance from the upper end until the center line of the terminal openings of the conductor support member, said from the lower end of the conductor support member of the terminal opening centerline or at The distance is made different, and the position of the mounting location or the positioning location in the conductor support member is set so as to be mountable with the conductor support member turned upside down.

According to the present invention, and can be mounted even if the conductive support member for supporting the terminal conductors of the three phases upside down becomes, the dimension between the terminal poles when aligned conductor support member vertically with variously configurable And can respond to a change in the distance between the poles.

1 is a perspective view of a general circuit breaker to which the present invention is applied, and is a diagram showing a relationship between a phase distance and a pole distance. The perspective view of the bushing of the present invention. FIG. 3 is a perspective view of the bushing of the present invention, as viewed at a different angle from FIG. 2. The front view of the bushing of this invention. The front view at the time of applying the bushing of this invention to the circuit breaker of the distance dL between poles: (a + a) and the distance dP between phases (m). FIG. 4 is a side cross-sectional view showing a state in which a circuit breaker and a bushing are combined when the bushing of the present invention is applied to a circuit breaker having a pole distance dL: (a + a) and a phase distance dP: (m). The top view in the state where the circuit breaker and bushing at the time of applying the bushing of the present invention to the circuit breaker of pole distance dL: (a + a) and phase distance dP: (m) are combined. The front view at the time of applying the bushing of this invention to the circuit breaker of pole distance dL: (a + b) and phase distance dP: (n). FIG. 4 is a side cross-sectional view showing a state in which a circuit breaker and a bushing are combined when the bushing of the present invention is applied to a circuit breaker having a pole distance dL: (a + b) and a phase distance dP: (n). The top view in the state where the circuit breaker and bushing at the time of applying the bushing of the present invention to the circuit breaker of pole distance dL: (a + b) and phase distance dP: (n) are combined. The front view at the time of applying the bushing of this invention to the circuit breaker of pole distance dL: (b + b) and phase distance dP: (p). FIG. 4 is a side cross-sectional view showing a state in which a circuit breaker and a bushing are combined when the bushing of the present invention is applied to a circuit breaker having a pole distance dL: (b + b) and a phase distance dP: (p). The top view in the state where the circuit breaker and bushing at the time of applying the bushing of the present invention to the circuit breaker of pole distance dL: (b + b) and phase distance dP: (p) are combined. The front view of the switchgear to which the present invention is applied. FIG. 1 is a side sectional view of a switchgear to which the present invention has been applied. 1 is a side sectional view showing a combination of a circuit breaker and a bushing according to a first embodiment of the present invention. FIG. 6 is a side sectional view showing a combination of a movable trolley and a bushing according to a second embodiment of the present invention.

Embodiment 1 FIG.
Embodiment 1 according to the present invention will be described with reference to FIGS. 1 to 7 and FIGS. 14 to 16.
14 and 15 are a front view and a side sectional view of a switchgear to which the present invention is applied. FIG. 16 is an enlarged view of the circuit breaker section 5 of the switchgear 1 shown in FIG.
From the main mother line 2 is branched bus 3 branches switchgear 1, via an upper pin conductor CA and the fitting portion of the circuit breaker 5 connected to the conductor 4 to be connected, the lower side of the circuit breaker 5 To the terminal conductor CB via a fitting portion . Circuit breaker 5 is connected to conductors 4 and 6 on the switchgear side and terminal conductors CA and CB at the operating position via a fitting portion. A conductor 7 is attached to the conductor 6, and a high-voltage cable 8 is attached to the conductor 7.
The conductor 7 is branched from a conductor 9 for connection to a transformer 16 for an instrument, and is connected to a conductor 10 for connection via a fitting portion to a terminal conductor provided on a drawer-type cart 11. I have.
The conductor support member made of the bushing 12 is manufactured by molding or casting as an integrally formed solid insulator made of a thermosetting resin such as epoxy or BMC (Bulk Molding Compound), and is arranged vertically as shown in FIG. It is arranged, which is passed through the conductors 4, 6 that will be connected through the circuit breaker 5 and the fitting portion in the bushing 12.

As shown in FIGS. 2, 3, and 4, the conductor supporting member constituted by the bushing 12 made of an integrally formed solid insulator can penetrate three phase conductors of an AC three-phase circuit.
The circuit breaker 5 shown in FIG. 1, when applying the bushing of the present invention, so that the terminal conductors CB of the upper terminal conductors CA and the lower side of the can through, 4, 5, 8 , As shown in FIG.
Bushing 12 has the overall shape of as shown in FIGS. 2 and 3, be one having a rectangular front shape, the upper-side terminal conductors of the terminal conductors CA and the lower side of the circuit breaker 5 CB A pair of bushings 12 having the same shape corresponding to each other is disposed so that the upper and lower ends are in contact with the same vertical position and both right and left ends are aligned.
The bushings 12 forming a pair are configured so that they can be rearranged upside down, and can be rearranged mutually. The bushing mounting hole 14a and the bushing mounting hole 14b are set so that the distance dimension from the upper end and the lower end and the distance dimension from the right and left ends are the same.

Hereinafter, details of the bushing of the present invention will be described.
FIG. 2 is a perspective view of the bushing 12 of the present invention, FIG. 3 is a perspective view of the bushing 12 of the present invention viewed from another angle, and FIG. 4 is a front view of the bushing 12 of the present invention.
here,
a: dimensions until the center line from the upper end of the terminal opening of the bushing b: dimension from the lower end of the bushing until the center line of the terminal openings c: the upper side in the upper end of the bushing blanking phishing mounting hole 14a dimensions to d: when the dimension from the lower end of the bushing to the blanking ashing mounting hole 14b of the lower side in,
The bushing is designed so that a <b and c = d.

Further, as a preferred example,
e: R of the three-phase alternating current circuit of the bushing, the width dimension of the terminal open mouth on the left and right for T-phase f: the width dimension of the terminal open mouth in the middle of the S-phase of the three-phase alternating current circuit of the bushing And when
The bushing is designed so that a <b, c = d, and e> f.
Further, the bushing 12, the terminal-opening mouth 13 is provided as shown in FIG. Terminal opening in the this 13 is open to form an elongated extending in the left slot.

The bushing 12 is attached to a frame FR provided on a cradle CR of the switchgear 1 where the circuit breaker 5 is installed. The both end portions of the upper edge of the bushing 12 Bed ashing mounting hole 14a of the upper side in is provided. At both ends of the lower edge of the bushing 12 is provided with lower lateral side of the probe phishing attachment hole 14b. A mounting bolt is inserted into each of the bushing mounting holes 14a and 14b, and a fixing screw hole that is screwed with the mounting bolt is provided in the frame FR of the cradle CR. It can be attached to FR.
Here, as shown in FIG. 3, one of the bushing mounting holes 14a, 14b can be used as the positioning projection 15. Bushing In this case, after fitting the positioning collision raised portion 15 into the positioning recess provided in the frame FR of the cradle CR, the fastening by three mounting bolts that are inserted bushing mounting hole 14a, and 14b 12 is attached to the frame FR.

In the example of FIG. 4, it is provided holes 14a Mounting bushings, the holes in total two for Mounting bushings Ru 14b Tona diagonally. In this case, the bushing 12 is mounted on the frame FR by fastening with two mounting bolts inserted into the bushing mounting holes 14a and 14b.
Here, it may be provided for positioning collision raised portion 15 to the position of the bushing for Mounting holes 14a as shown in an enlarged portion A of FIG. In this case, after fitting the positioning collision raised portion 15 into the positioning recess provided in the frame FR of the cradle CR, bushing 12 by fastening by a single mounting bolt inserted in the bushing mounting hole 14b is It is attached to the frame FR.

Hereinafter, examples in which the pole gap dL and the phase gap dP can correspond to various cases in the circuit breaker 5 will be described in the first embodiment, the second embodiment, and the third embodiment.
In the first embodiment, a description will be given of a case where the bushing 12 of the present invention is applied to the circuit breaker 51 having a pole distance dL: (a + a) and a phase distance dP: (m). FIG. 5 is a front view of the bushing according to the first embodiment.
Bushing 12, the upper side the lower side of the probe Sshin grayed from the center line of the terminal conductors C A opens terminal you through the mouth portion 1 3 of the circuit breaker 51 to definitive the bushings 12 of the pair being arranged vertically terminal conductor CB of the circuit breaker 51 is arranged vertically such that the sum of the distance until the center line of the terminal open mouth 1 3 penetrating becomes (a + a) in 12. At this time, a side sectional view in a state where the circuit breaker 51 and the bushing 12 are combined is as shown in FIG. 6, and a plan view is as shown in FIG.

5 showing a front view of a bushing 12, of the bushing 12 forming a pair are arranged vertically, blanking ashing 12 on the lower side has dimensions a between the center line of the top or et terminal open mouth 13 , similar to that of FIG. 4 are those smaller than the dimension b of the center line between the lower end terminal open mouth 13 from the lower side of the bushing 12, it is aligned with blanking ashing 12 of the lower side Bed ashing 12 of the upper side be one that is arranged to the lower side of the probe phishing 12 in upside down form, the dimensions of the center line until the lower end or et terminal open mouth 1 3 of the upper side of the bushing 12 a is one less than the dimension b between the center line of the upper terminal opening mouth 13 from the upper side of the bushing 12, the vertical distance between the centers of mutually terminal open mouth 13 a (a + a) Therefore, it is possible to correspond to the circuit breaker 5 having the distance dL between the poles: (a + a). Things.
The bushings 12 arranged vertically above and below the bushing mounting holes 14a and 14b and the positioning projections 15 have upper and lower ends and distance dimensions from the left and right ends so that the bushings 12 can be mounted upside down. They are set identically.

Embodiment 2 FIG.
Second Embodiment A second embodiment according to the present invention will be described with reference to FIGS. FIG. 8 is a front view of a switchgear to which the present invention is applied in the second embodiment. FIG. 9 is a side sectional view of a switchgear to which the present invention is applied in the second embodiment, and FIG. 10 is a side sectional view in which the circuit breaker and the bushing of the present invention are combined in the second embodiment. In the second embodiment, the configuration and the operation and effect other than the specific configuration and the operation and effect described here are the same as those in the above-described first embodiment, and the same operation and effect are achieved. is there.

In the second embodiment, when the bushing of the present invention is applied to the circuit breaker 52 having the pole distance dL: (a + b) and the phase distance dP: (n), as shown in FIG. 8, FIG. 9 and FIG. Become.
FIG. 8 is a front view of the bushing according to the second embodiment. Bushing 12, the upper side the lower side of the probe Sshin grayed from the open mouth 1 3 centerline for that terminal to penetrate the terminal conductors C A of the circuit breaker 52 to definitive the bushings 12 of the pair being arranged vertically terminal conductor CB of the circuit breaker 52 is arranged vertically such that the sum of the distance until the center line of the terminal open mouth 1 3 penetrating becomes (a + b) in 12. At this time, a side sectional view in a state where the circuit breaker 52 and the bushing 12 are combined is as shown in FIG. 9, and a plan view is as shown in FIG.

8 showing the front view of the bushing 12, of the bushing 12 forming a pair are arranged vertically, blanking ashing 12 on the lower side has dimensions a between the center line of the top or et terminal open mouth 13 , similar to that of FIG. 4 are those smaller than the dimension b of the center line until the lower end or et terminal open mouth 13, the upper side of the probe to be juxtaposed and blanking ashing 12 of the lower side ashing 12 is a intended to be disposed in the same vertical relationship with the lower side of the probe phishing 12, the dimension b of the center line until the lower end or et terminal open mouth 13 of the upper side of the bushing 12 at the upper end or al pin are those greater than the dimension a of the center line between the use open mouth 13, the vertical distance between the centers of mutually terminal open mouth 13 becomes (a + b), inter-electrode distance dL: of (a + b) It can correspond to the circuit breaker 5.
As described above, the bushings 12 arranged vertically above and below the bushing mounting holes 14a and 14b and the positioning projection 15 from the upper and lower ends and the left and right ends thereof so that the bushings 12 can be mounted upside down. Are set to be the same as each other.

Embodiment 3 FIG.
Third Embodiment A third embodiment according to the present invention will be described with reference to FIGS. FIG. 11 is a front view of a switchgear to which the present invention is applied in the third embodiment. FIG. 12 is a side cross-sectional view of a switchgear to which the present invention is applied in the third embodiment, and FIG. 13 is a side cross-sectional view in which a circuit breaker and a bushing of the present invention are combined in the third embodiment. In the third embodiment, the configuration and the operation and effect other than the specific configuration and the operation and effect described here are the same as those in the first embodiment, and have the same operation and effect. is there.

In the third embodiment, when the bushing is applied to the circuit breaker 53 having the pole distance dL: (b + b) and the phase distance dP: (p), the state is as shown in FIGS. 11, 12, and 13.
FIG. 11 is a front view of the bushing according to the third embodiment. Bushing 12, the upper side the lower side of the probe Sshin grayed terminal conductors C A of the circuit breaker 53 to definitive the bushings 12 from the center line of the terminal open mouth 1 3 you through the paired which are arranged in parallel in the vertical terminal conductor CB of the breaker 53 is arranged vertically such that the sum of the distance until the center line of the terminal open mouth 1 3 penetrating is (b + b) in 12. At this time, a side sectional view in a state where the circuit breaker 53 and the bushing 12 are combined is as shown in FIG. 12, and a plan view is as shown in FIG.

11 showing a front view of a bushing 12, of the bushing 12 forming a pair are arranged vertically, blanking ashing 12 on the lower side has the dimension b between the center line of the top or et terminal open mouth 13 , those opposite of FIG. 4 are those greater than the dimension a of the center line until the lower end or et terminal open mouth 13, the upper side of the probe to be juxtaposed and blanking ashing 12 of the lower side ashing 12 be one that is arranged to the lower side of the probe phishing 12 in upside down form, dimension b of the center line until the lower end or et terminal open mouth 13 of the upper side of the bushing 12 at the upper end or al pin are those greater than the dimension a of the center line between the use open mouth 13, the vertical distance between the centers of mutually terminal open mouth 13 becomes (b + b), inter-electrode distance dL: a (b + b) It can correspond to the circuit breaker 5.
As described above, the bushings 12 arranged vertically above and below the bushing mounting holes 14a and 14b and the positioning projection 15 from the upper and lower ends and the left and right ends thereof so that the bushings 12 can be mounted upside down. Are set to be the same as each other.

Embodiment 4 FIG.
Embodiment 1 according to the present invention will be described with reference to FIG. FIG. 17 is a side sectional view showing a combination of a movable trolley and a bushing in the fourth embodiment. In the second embodiment, the configuration and the operation and effect other than the specific configuration and the operation and effect described here have the same configuration as the above-described first embodiment and have the same operation and effect. is there.

Figure 17 is an enlarged view of the voltage transformer 16 mounted on base vehicle 1 1 drawout type switchgear 1 shown in FIG. 15. Only one bushing 12 is used. The 3-phase conductors 10 of the switch gear side connected through the terminal conductor CA and the fitting portion of the three-phase voltage transformer 16 mounted on base vehicle 1 1 drawout type is through the bushing 12 The bushing 12 insulates and supports the conductor 10.

  As described above, by designing the drawer-type cart so as to be adaptable to the bushing of the present invention, the bushing 12 can be shared, and the cost of the bushing can be further reduced.

As described above, the bushing 12 used in the switchgear of the present invention has a dimension (c) from the upper end of the bushing 12 to the upper bushing mounting hole 14a and the lower end of the bushing 12, as shown in FIG. due to the same size dimension (d) to the lower side of the probe phishing mounting hole 14b from, it is can be mounted to the bushings 12 upside down.
Further, from the upper end of the bushing 12 in FIG. 4 and dimension (a) between the center line of the terminal opening 13, the dimension (b) between the center line of the terminal apertures 13 from the lower end of the bushings 12 Since the dimensions have a relationship of a <b, the dimensions between the terminal poles of the circuit breaker when the bushings 12 are arranged vertically can be set to three types of (a + a), (a + b) and (b + b), It becomes possible to absorb a change in the "inter-electrode distance" of the breaker terminal.
Furthermore, as shown in FIG. 4, the open mouth 13 is a horizontally long terminal, the three-phase alternating current circuit of the bushing R, the width dimension of the terminal opening 13 at the left and right T-phase (e), the bushing Since the relationship with the width dimension (f) of the terminal opening 13 at the center for the S phase of the three-phase AC circuit is e> f, a change in the "inter-phase distance" of the breaker terminal can be absorbed. It is.

As a result, the bushings can be shared by circuit breakers having different "inter-phase distances" and "inter-pole distances".
As a result, the following effect of reducing the bushing cost can be obtained.
・ The cost of die investment when manufacturing an insulator by molding or casting can be reduced.
・ By sharing bushings, the types of bushings to be produced are limited, and productivity is improved.
In addition, by providing a hole in which the projection provided on the bushing fits into the bushing fixing bracket when mounting the bushing, it is possible to improve workability and reduce the number of bushing fixing points when installing the bushing for bushing fixing. Become.

As described above, in the embodiment of the present invention, the three-phase AC circuit R, S, 3-phase pin conductor CA juxtaposed constituting each phase terminal of the T-phase, CB is through, these comprising a conductive support member comprising a bushing 12 which supports and insulates the terminal conductors CA, and CB each other, in a switch gear used side by side the conductive support member vertically, from the upper end of the terminal opening 13 of the conductor support member and the distance a of the center line until said conductor support lower causes different from the distance b at the center line between the terminal opening 13 from member, the conductor support conductor supported from upper and lower ends of the member member mounting holes 14 and dimensions c until the positioning point where collected with location or positioning projections 15 of the conductor support member is provided is provided, wherein the conductor supporting preparative with points or positions of the conductor support member from upper and lower ends of the member The same west and dimension d to point decided and, to a dimension from the left and right ends of the winding with location or positioning location of the conductor support member which is plurality in the same, the mount position or positioning points in the conductor support member The switchgear is characterized in that the position is set so that the conductor support member can be mounted with the conductor support member turned upside down.
Thereby, even if the conductor supporting member that supports the terminal conductor is turned upside down, attachment becomes possible, and the dimension between the terminal poles when the conductor supporting members are arranged vertically can be variously set. It can respond to a change in the distance dL.

In the embodiment of the present invention, in the preceding arrangement, pin conductor CA of the 3-phase conductor support member made of the bushing 12, the terminal-opening mouth 13 you CB is through is formed, before Symbol terminal open mouth 13 switch gear, characterized in that are open in the lateral direction in the slot-shaped is formed.
Thus, three-phase pin conductors CA, CB and can be stably insulating support, can be reliably performed to ensure insulation.

In the embodiment of the present invention, in the preceding arrangement, the left and right width dimension of the terminal open mouth 13 for R, T phase of the three-phase alternating current circuit provided on the left and right of the conductor support member made of the bushing 12 e is switchgear, characterized in that it is set larger than the lateral width dimension f of the terminal opening mouth for S-phase of the three-phase alternating current circuit provided in the center of the bushing is formed.
As a result, a change in the inter-phase distance dP at a terminal such as a circuit breaker can be absorbed, and even if the inter-phase distance dP is different, it is possible to flexibly cope with the case.

In the embodiment of the present invention, in any one of the previous sections, the bushing mounting hole 14 of the positions Mounting of the conductor support member in the conductor support member made of the bushing 12 as the positioning point switchgear, characterized in that a positioning collision force unit 1 5 is formed.
Thereby, the conductor supporting member formed of the bushing 12 can be reliably fixed and positioned.

In the embodiment of the present invention, in the preceding arrangement, the positioning collision raised portion 1 5 as the positioning point bushing mounting hole 14 of the positions Mounting of the conductor support member made of the bushing 12 A switch gear is characterized in that the conductor supporting member is provided diagonally when viewed from the front.
Thereby, the conductor supporting member made of the bushing 12 can be fixed and positioned more reliably.

  In the present invention, some or all of the embodiments can be freely combined, and the embodiments can be appropriately modified or omitted within the scope of the invention.

1 switchgear , 2 main bus, 3 branch bus, 4 conductor, 5, 51, 52, 53 breaker, 6 conductor, 7 conductor, 8 high voltage cable, 9 conductor, 10 conductor, 11 bogie, 12 bushing (conductor support member) ) , 13 terminal opening, 14 bushing mounting hole, 14a bushing mounting hole, 14b bushing mounting hole, 15 positioning projection, 16 instrument transformer, CA terminal conductor, CB terminal conductor

Claims (5)

Terminal conductors of three phases are arranged in parallel is provided an opening for the terminal to be penetrated with a conductive support member for supporting and insulated from each other said terminal conductors, used side by side the conductive support member vertically switch in the gear, the distance in the conductor centerline from the upper edge of the opening for the pin supporting member or, together made different from the distance from the lower end of the conductor support member until the center line of the terminal opening, wherein A switchgear wherein a position of a mounting portion or a positioning portion in a conductor supporting member is set so as to be mountable with the conductor supporting member turned upside down. The opening for the pin you through the previous SL terminal conductors in the conductor support member is formed, according to claim 1, wherein the terminal opening, characterized in that it opens in the left-right direction in the slot-like Switchgear. The right and left widths of the R and T phase terminal openings of the three-phase circuit provided side by side on the conductor support member are equal to the S phase terminal of the three-phase circuit provided at the center of the conductor support member. switchgear according to claim 2, characterized in that it is listening Rimodai by lateral width dimension of the use opening set. Claims, characterized in that a positioning collision force of the position-decided Me point of the conductive support member mounting holes and pre Symbol conductive support member as location Mounting of the conductor support member to the conductor support member 2. The switchgear according to 1. Switchgear according to claim 4 in which prior Symbol conductor support member and the attachment hole the positioning collision force unit is characterized in that it is provided diagonally when viewed the conductive support member from the front.

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