JP3423992B2 - Pole-mounted transformer device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pole-mounted transformer device for the purpose of beautifying a distribution line and simplifying pole material, pole work, etc. by integrally pole-mounting with a pole.

[0002]

2. Description of the Related Art Conventionally, electric power is supplied to general consumers from a distribution substation by a high voltage distribution line 1 of 6.6 kV as shown in FIG. And the high-voltage distribution line 1
Is supported by a pole post 3 which is laid across a utility pole 2 through an insulator 4, and a cutout switch 6 is also attached from this high-voltage distribution line 1 to the utility pole 2 using a mounting bracket 5 and the like, and a distribution transformer 7 Power is supplied to the general consumer through.

[0003]

However, as described above, the electrical equipment such as the distribution transformer 7 and the cutout switch 6 is installed on the utility pole 2 by using the mounting bracket 5, or the electrical equipment and the high voltage distribution line are installed. 1 and the wiring work of the high voltage down line 8 for connecting the electric devices to each other requires not only a great deal of time and labor, but also the mounting poles 3 and the mounting brackets 5 along with the installation of the electric devices. Therefore, there is a problem that the cost is high for installing the electric device. In addition, the high-voltage distribution line 1 that is retained by the insulator 4 and installed between the electric poles 2 and the connection line such as the high-voltage down line 8 that connects the high-voltage distribution line 1 and the electric equipment are crossed over the road. There was a problem in the landscape of the city because it was wired in the state of being. Moreover, since the connecting lines such as the high voltage down line 8 are crossed with each other, when maintaining and inspecting the distribution line such as inspecting electrical equipment, the connecting line such as the high voltage down line 8 and the pole post 3 are contacted. There is a problem that it is difficult to perform maintenance and inspection work efficiently because of the danger.

In view of the above-mentioned various problems, the present invention is a safe and easy way to carry out work such as mounting poles of a distribution transformer and wiring to the transformer without damaging the cityscape. An object is to provide a pole-mounted transformer device having excellent reliability.

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, a cutout switch for connecting a high-voltage distribution line or a branch connector for branching and connecting a low-voltage distribution line and a distribution line on the customer side is housed on the top of a utility pole. A box-shaped transformer pedestal is mounted and fixed, and on both ends of the upper surface of the transformer pedestal, a cable connector on the primary side and the secondary side that is individually connected to the cutout switch and the branch connection body. Are mounted upward, respectively, and each connector is molded in a frustoconical shape with synthetic resin in a state in which, for example, a tulip-shaped contactor is incorporated. On the other hand, a transformer mounted and fixed on a transformer cradle has, for example, a bushing-type cable support member attached to the upper side wall of the case accommodating the transformer body, and the transformer body is mounted via this cable support member. The primary side lead wire and the secondary side lead wire derived from the above are electrically connected to the primary side and secondary side lead cables to be wired outside the case, and the cable supporting member is connected to the outer peripheral surface of the case. At the position corresponding to each of the cable connectors on the primary side and the secondary side, a round bar-shaped contact conductor is installed in a conical space at the tip of the lead cable that hangs along the cable connector. The device-side connectors formed so that they can be fitted to each other are connected.

When the transformer is mounted on the transformer pedestal, the device side connectors connected to the tips of the primary and secondary side lead cables are fitted with the cable connectors projecting on the transformer pedestal. Then, the contact conductor installed in the device-side connector and the contactor installed in the cable connector are connected to each other when the connectors are fitted to electrically connect the transformer and each of the high-voltage and low-voltage distribution lines. Next, after fixing the mounting members provided at the corresponding positions of the transformer and the transformer cradle, a bottomed cylindrical transformer protective cover is loosely fitted on the outside of the transformer, and the protective cover is attached. The pole-mounted transformer device is constructed by fixing the open end of the column to the side edge of the transformer pedestal.

[0007]

According to the present invention, the primary and secondary side cable connectors on the transformer pedestal provided on the top of the electric pole and the tips of the primary and secondary side lead cables hanging outside the transformer are attached. The device connectors on the secondary and secondary sides can be fitted and held at the same time when the transformer is mounted and fixed on the transformer pedestal, so that they can be electrically connected to each other. Wiring work with is convenient because it can be done at the same time as the transformer pillar work.

Further, the transformer is installed on the top of the electric pole by covering the outside with a protective cover, and the cut-out switch and the branch connector for connecting to each of the high voltage and low voltage distribution lines are all transformers. It is stored in the cradle and is not exposed to the outside, and since it does not require any mounting parts such as poles and armrests, it can maintain a good cityscape and enables economical production. It is possible to provide the transformer device.

Further, since the connecting lines such as the high-voltage distribution line and the cutout switch, the cutout switch and the transformer, and the high-voltage pull-down line that respectively connect the transformer and the branch connection body are not exposed to the outside, It is possible to safely and efficiently perform maintenance and inspection work of electrical equipment at.

[0010]

Embodiments of the present invention will be described below with reference to FIGS. In FIGS. 1 and 2, 11 is a transformer device of the present invention, which is placed and fixed on the top of a utility pole 12 made of steel pipe. This transformer device 11 is roughly classified into a utility pole 12 as shown in FIG. A box-shaped transformer pedestal 13 that is firmly fixed to the top by welding or the like, and this transformer pedestal 13
It is composed of a transformer 21 mounted and fixed on the top, and a protective cover 15 surrounding the outside of the transformer 21.

Next, the structure of the transformer pedestal 13 will be described. In FIGS. 2 and 3, reference numeral 16 is a cutout switch connected to a high-voltage distribution line (not shown), and 17 is a branch connection body that branches the low-voltage distribution line and a distribution line of a general consumer to supply electric power. 16 and the branch connection body 17 are accommodated and installed at a predetermined position in the transformer pedestal 13. The transformer pedestal 13 has a high-voltage side bushing H on one side wall thereof, which also serves as an anchor and a connection for the high-voltage distribution line.
Are arranged side by side in the vertical direction at equal intervals, and at both ends of the wall a on the upper surface side, as shown in FIGS. A predetermined number of secondary side cable connectors 19 connected to the cable connector 18 and the branch connector 17 are attached upward.

Each of the primary and secondary cable connectors 1
As shown in FIGS. 5 and 6, 8 and 19 are, for example, in a state in which a contact 20 formed by molding a conductive metal plate such as copper into a tulip shape is provided, and molded into a truncated cone shape with a synthetic resin. Mounted upright on the transformer pedestal 13,
The contactor 20 of each of the cable connectors 18, 19 and the cutout switch 16 and the branch connection body 17 are connected using connection lines b, c as shown in FIG. In addition, as shown in FIG. 4, stud bolts 23 for fixing a base 22 of a transformer 21, which will be described later, are provided near a central portion of the wall body a to which the cable connectors 18 and 19 are attached, with a required number of stud bolts 23. It has been planted. Further, a planar rectangular mounting frame body 24 is integrally provided with the wall body a on the peripheral edge of the upper surface of the transformer pedestal 13.

Next, the structure of the transformer 21 mounted and fixed on the transformer cradle 13 will be described. In FIG.
Reference numeral 25 denotes a transformer body, and in the present example, two iron cores wound with windings are stacked and provided, and are housed in a case 26 together with insulating oil to form a transformer 21. Reference numeral 27 is a cover of the transformer 21, and 28 and 29 are bushing type cable supporting members penetrating both sides of the upper side of the case 26. In one supporting member 28, the primary side lead wire d derived from the transformer main body 25 is provided. And the lead cable 30 on the primary side are connected, and the lead cable 30 is hung outside the case 26 at a position corresponding to the cable connector 18 on the primary side.
Further, the secondary side lead wire e derived from the transformer body 25 is
The lead cable 31 on the secondary side by the other supporting member 29
Then, the lead cable 31 is hung outside the case 26 at a position corresponding to the cable connector 19 on the secondary side. Reference numeral 32 denotes a cable support attached to the outside of the case 26. As shown in FIGS. 2 and 3, the lead cables 30 and 31 on the primary side and the secondary side that hang down along the case 26 are partially supported, and The lead cables 30 and 31 are prevented from swinging.

Numerals 33 and 34 are primary and secondary equipment-side connectors connected to the lower ends of the primary and secondary side lead cables 30 and 31, respectively.
As shown in FIG. 6, a circular bar-shaped contact conductor 35 connected to the core wire s of the lead cables 30 and 31 is provided inside a conical space, and each of the cable connectors 18 and 19 on the primary and secondary sides. It is formed by molding a synthetic resin into a hollow conical shape so that it can be detachably fitted. When the transformer 21 is mounted on the transformer pedestal 13, the lead cables 30 and 31 allow the device-side connectors 33 and 34 to normally fit with the cable connectors 18 and 19 so that both connectors 18 (19) are connected. ), 33 (34) can be electrically connected, and the insertion force when the round bar-shaped contact conductor 35 is inserted into and contacts the tulip-shaped contactor 20 at the time of fitting, the lead cables 30, 31 themselves are It has enough hardness to prevent bending.

Reference numeral 36 shown in FIG. 3 denotes a heat radiation fin for cooling provided on the case 26, and 37 denotes an outer air circulation hole (FIG. 1) formed in an appropriate number of cylindrical protective cover 15 surrounding the outside of the transformer 21. The protective cover 15 is detachably fixed to the mounting frame body 24 provided on the upper surface of the transformer pedestal 13 on the outer side of the transformer 21 by using a tightening bolt 15a. Further, in FIG. 3, L is a low-voltage side bushing attached to the electric pole 12, and is connected to the branch connection body 17 in the transformer pedestal 13 by a connection line c. Further, the high voltage side bushing H and the cutout switch 16 are connected to each other by a connecting line b.
Are connected in the transformer stand 13. Reference numeral 38 shown in FIG. 1 is an inspection door that opens and closes an inspection window (not shown) attached to the protective cover 15.
A circulation hole 37 for the outside air is also formed at 8.

Next, the case where the transformer 21 is installed on the transformer pedestal 13 of the electric pole 12 will be described. In installing the transformer 21, as shown in FIG. 7, a utility pole 12 having a transformer pedestal 13 mounted in advance on its top is established on a predetermined ground surface. Subsequently, as shown in FIG. 7, the transformer 21 is lifted by the crane 39 and mounted on the transformer pedestal 13. In this case, the worker rides on the work box 40 of the bucket truck in advance and stands by at the position of the transformer pedestal 13. Then, the transformer 21 is lifted up by the crane 39 and moved to above the transformer pedestal 13 on the pillar, and the mounting hole f of the base 22 is located at the position of the stud bolt 23 projecting from the wall a on the upper surface of the transformer pedestal 13. Then, the transformer 21 is lowered as it is, the stud bolt 23 is inserted into the mounting hole f, and the transformer pedestal 13 is mounted. When the transformer 21 is mounted on the transformer pedestal 13, the stud bolts 23 are inserted into the base 22, and the device side connectors 33 and 34 on the primary and secondary sides and the primary and secondary sides. The cable connectors 18 and 19 are also fitted at the same time.

That is, the lead cables 3 on the primary and secondary sides
Device side connectors 33, 34 connected to 0, 31
Since the lead cables 30 and 31 are fixed by the cable support 32 at the positions corresponding to the cable connectors 18 and 19 on the primary and secondary sides, respectively, the transformer 21 is placed on the transformer pedestal 13. When mounted, the device-side connectors 33 and 34 effectively utilize the load of the transformer 21 to insert the contact conductor 35 into the tulip-shaped contactor 20 as shown in FIG. 33 and 34 are fitted with the cable connectors 18 and 19,
The two connectors 33 (34) and 18 (19) can be electrically connected well in one operation. As a result, the primary side of the transformer 21 has a high-voltage side bushing H → connecting line b → cutout switch 16 → connecting line b → primary side cable connector 18 → device side connector 33 → primary side lead cable 30. → Cable support member 28 → Primary side lead wire d
Then, the primary side of the transformer 21 and a high voltage distribution line (not shown) are connected via.

The secondary side of the transformer 21 is the secondary side lead wire e → the cable support member 29 → the secondary side lead cable 3.
1 → Device side connector 34 → Secondary side cable connector 1
9 → Connecting line c → Branch connector 17 → Connecting line c → Connecting to a low-voltage distribution line (not shown) or a connecting line on the consumer side via a low-voltage side bushing L. At the same time that the transformer 21 and the external distribution line are connected as described above, the base 22
A fixing nut is screwed onto the head of the stud bolt 23 which is inserted into and protrudes from the mounting hole f of the transformer 21.
Is fastened and fixed to the transformer pedestal 13. As a result, the transformer 2
1 can be installed vertically on the transformer pedestal 13 as shown in FIG.

As described above, the transformer 21 is connected to the utility pole 12
After installing on the transformer stand 13 at the top, the crane 39
The protective cover 15 is lifted by the above so as to cover the outside of the transformer 21, and the lower opening end g of the protective cover 15 is engaged with the outer periphery of the mounting frame body 24 provided on the transformer pedestal 13, and from the outside of the opening end g. The tightening bolt 15a is screwed to the mounting frame 24 and the protective cover 15 is attached to the side peripheral edge of the transformer pedestal 13 to form the transformer device 11 in which the transformer 21 is covered with the protective cover 15. As a result, on the utility pole 12, the transformer 21 is connected to the high-voltage and low-voltage distribution lines by the cut-out switch 16, the branch connection body 17, and the connection lines b and c connecting these devices and the transformer 21. Furthermore, the lead cables 30 on the primary and secondary sides of the transformer 21,
Since all the accessories such as 31 are covered with the protective cover 15 and the transformer pedestal 13, it is possible to provide the transformer device 11 having an excellent cityscape. Then, by energizing the high-voltage distribution line, electric power can be supplied to the general consumer via the transformer device 11.

Next, a second embodiment of the present invention will be described with reference to FIGS. The transformer device 11 according to the second embodiment.
a is characterized by that it has a structure to reduce the diameter compared with the transformer device 11 described in the first embodiment, the transformer
As shown in FIGS. 9 and 10, the structure of the container 50 includes a pair of side plates 4 inside a case 41 formed of a steel plate in a bottomed tubular shape.
2 and 42 are welded to the inner peripheral surface of the case 41 by leaving an accommodating portion 43 having a substantially elliptical cross section capable of accommodating the transformer main body 25, and corresponding to the side plates 42, 42 and the side plates 42, 42. A crescent-shaped hollow portion 44 is formed between the inner peripheral surface of the case 41, the upper end of the hollow portion 44 is closed in the case 41, and insulating porcelain tubes 46, 46a are attached to the closed portion 45.
The primary and secondary side lead wires d and e led out from the transformer main body 25 through the insulating porcelain tubes 46 and 46a, and the primary and secondary side lead cables 30 arranged in the cavity 44. , 31 are connected.

Further, at the tips of the lead cables 30 and 31 projecting from the bottom plate of the case 41, the primary and secondary sides on the transformer pedestal 13 mounted on the tops of the electric poles 12, as in the first embodiment. The device side connectors 33 and 34 which are detachably fitted to the cable connectors 18 and 19 are connected. Further, the bottom plate of the case 41 is engaged with a box-shaped mounting seat 47 provided on the transformer pedestal 13 to establish the case 41 containing the transformer main body 25 on the transformer pedestal 13. Frame 48
The case 41 can be set up so that it cannot be tilted by fastening the engaging frame 48 to the mounting seat 47 with a fastening bolt 49, as shown in FIG. At this time, that is, when the case 41 is established on the transformer pedestal 13, the device side connectors 33 and 34 are already connected to the cable connector 1 as described in the first embodiment.
The transformer device 11a is electrically connected to the high-voltage and low-voltage distribution lines by being fitted in the transformers 8 and 19, and can supply electric power to general consumers as the high-voltage distribution line is energized.

In the transformer device 11a constructed according to the second embodiment, the lead cables 30, 31 on the primary side and the secondary side are effectively utilized by making effective use of a part of the empty space in the case 41 accommodating the transformer main body 25. Since it is configured to draw out, the transformer 41 that can reduce the diameter dimension of the case 41 and has an excellent cityscape
It becomes possible to provide 1a. Further, since the case 41 accommodating the transformer main body 25 is configured to be in direct contact with the outside air, the cooling effect can be improved in combination with the reduction of the diameter dimension.

Next, a third embodiment of the present invention will be described with reference to FIGS. The transformer device 11b of the third embodiment and the transformer device 1 described in the first and second embodiments.
As shown in FIG. 13, the points different from 1 and 11 a are that the bottom plate 51 a of the case 51 accommodating the transformer main body 25 has lead wires on the primary and secondary sides led out from the transformer main body 25 (see FIG. 1).
In FIG. 3, the device side connectors 33 and 34 (see FIGS. 13 and 14) to which the primary side lead wire d is connected are attached downward, and the device side connectors 33 and 34 are attached.
Is a cable connector 1 on the transformer pedestal 13 when the transformer 52 constructed by housing the transformer main body 25 in the case 51 is installed on the transformer pedestal 13 mounted on the top of the electric pole 12.
Since it can be fitted with 8, 19, the transformer device 1
1b can be electrically easily connected to the high voltage and low voltage distribution lines.

When installing the transformer 52, when the transformer 52 is mounted on the transformer pedestal 13, the cover cylinder 53 surrounding the device side connectors 33 and 34 is inserted into the cable connector 1.
8 and 19 are fitted to a cylindrical mounting seat 54 provided on the transformer pedestal 13 and the cover cylinder 53 and the mounting seat 54 are connected to each other as shown in FIG.
As shown in FIG. 4, by tightening and fixing with the tightening bolt 55, the transformer 52 can be installed upright on the transformer pedestal 13. After this, the protective cover 56
12 is covered on the outer side of the transformer 52, and its base is fixed to the outer peripheral surface of the transformer pedestal 13 by bolting or the like, as shown in FIG. In FIG. 13, reference numeral 57 denotes a radiating fin provided in the case 51 of the transformer 52, which can cool the transformer 52 satisfactorily by the outside air flowing in from a not-illustrated flow hole provided in the protective cover 56.

In the third embodiment, the device side connector 33 mounted on the bottom 51a of the case 51 of the transformer 52,
Since the transformer device 11b is configured so that the transformer 52 and the high-voltage and low-voltage distribution lines can be electrically connected by 34, the transformer device 11b can be formed with a small diameter dimension. There is an advantage that the transformer device 11b installed on the top of the electric pole 12 can be made small and lightweight.

[0026]

As described above, according to the present invention, at the top of the electric pole, the transformer pedestal containing the equipment connected to the high voltage and low voltage distribution lines such as the cutout switch and the branch connector is attached, and the transformer pedestal is installed. A cable connector on the primary side and secondary side for connecting the cutout switch and the like with a contactor installed on the table is projected upward, and on the transformer pedestal,
The primary and secondary side lead cables connected to the transformer body are hung down on the outer peripheral surface of the case to mount and fix the transformer, and at the same time, the device side connector connected to the end of the lead cable is operated once for the cable connector. Since it is configured so that they can be electrically connected by being fitted with each other, the transformer installation work on the pole can be performed quickly and easily. Moreover, since the lead cable is wired on the outside of the transformer,
By attaching the protective cover from the outside, the heat dissipation fins attached to the lead cables and the case can be covered so as not to be exposed to the outside, so that a transformer device excellent in cityscape can be provided.

Further, according to the present invention , the lead cable is wired using a cavity formed by partitioning the lead cable in the case,
By constructing the transformer device by projecting the device side connector that fits the cable connector on the transformer cradle on the bottom surface of the transformer case, the transformer device can reduce its diameter dimension. Therefore, the size and weight of the transformer device installed on the pole can be reduced, which allows the transformer installed on the top of the utility pole to be as close as possible to the diameter of the utility pole, thus maintaining a good cityscape. At the same time, there is an advantage that this type of transformer device can be manufactured compactly and lightly and economically with a simple structure.

[Brief description of drawings]

FIG. 1 is a front view showing a mounted state of a transformer device of the present invention.

FIG. 2 is a vertical cross-sectional view of the transformer device of the present invention.

FIG. 3 is a front view showing the mounting relationship between the transformer and the transformer pedestal in the transformer device of the present invention.

FIG. 4 is a side view showing an enlarged main part of the transformer device of the present invention.

FIG. 5 is a vertical cross-sectional view showing a joint relationship between a device-side connector and a cable connector.

FIG. 6 is an explanatory diagram similarly showing an apparatus side connector and a cable connector in an exploded manner.

FIG. 7 is an explanatory diagram for explaining a mounting state of the transformer device of the present invention.

FIG. 8 is a front view showing a second embodiment of the transformer device of the present invention.

9 is a longitudinal sectional view of a main part of the transformer device shown in the second embodiment of FIG.

FIG. 10 is likewise a cross-sectional view of the essential parts of the second embodiment.

11 is a cross-sectional view taken along the line AA of FIG.

FIG. 12 is a front view of a transformer device showing a third embodiment of the present invention.

FIG. 13 is a longitudinal sectional view of an essential part of the transformer device shown in FIG.

14 is a cross-sectional view taken along the line BB of FIG.

FIG. 15 is an explanatory diagram showing a mounted state of a conventional pole transformer.

[Explanation of symbols]

11 Transformer device 12 utility poles 13 Transformer stand 15 Protective cover 18 Primary side cable connector 19 Secondary side cable connector 21 transformer 25 transformer body 26 cases 30 Primary lead cable 31 Secondary side lead cable 33 Primary side device side connector 34 Secondary-side device-side connector

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inoue Tsuneo, 1 Higashishinmachi, Higashi-ku, Nagoya, Aichi Chubu Electric Power Co., Inc. Industrial Equipment Division (72) Inventor Koji Yamanaka 46 Tomioka, Nakajo-cho, Kitakanbara-gun, Niigata Prefecture 1 Hitachi Industrial Co., Ltd. Industrial Equipment Division (72) Takeshi Nishimura 2-11-1, Tagawa, Yodogawa-ku, Osaka Stock Company Daihen (72) Inventor Hideo Ikema 1 Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd. (56) References: Actual 61-62510 (JP, U) Actual 61-65810 (JP, U) ) Actual Development Sho 56-96535 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02B 5 / 00,5 / 02

Claims (3)

(57) [Claims] 1. A transformer pedestal accommodating a device to be connected to a distribution line is installed on the top of a utility pole, and a primary and secondary connection to the distribution line via the device is provided on the upper surface of the transformer pedestal. A cable connector on the secondary side is provided, and the device side connector on the primary side and the secondary side are connected to a position corresponding to the cable connector to electrically connect to the transformer body housed in the case . a transformer configured to vertically lead cable outside the casing, the transformer and at the same time nono fixed on a pedestal, transformers and distribution line freely-fitted detachably to the apparatus-side connector to the cable connector Electrically connect to
A pole-mounted transformer device, wherein a protective cover covering the transformer is detachably attached to a transformer pedestal on the outside of the transformer. 2. A device for connecting to a distribution line is stored on the top of a utility pole.
Install the installed transformer pedestal on the top of this transformer pedestal.
Is the primary and secondary side that connects to the distribution line through the device
A pair of side plates are provided inside the case with the cable connector of
And the case and the pair of side plates are provided with an elliptical accommodating portion.
A crescent-shaped cavity is formed by the case and each side plate.
Housing the transformer body in the housing section,
Connect the device side connector on the primary and secondary sides to the position corresponding to the connector.
Primary and secondary connecting the transformer and electrically connecting to the transformer body
A modification in which the lead cable on the secondary side is passed through the cavity.
At the same time as mounting and fixing the pressure device on the transformer pedestal,
Removably fit the device side connector to the cable connector.
Characterized in that the transformer and the distribution line are electrically connected.
A pole-mounted transformer device. 3. A device for connecting to a distribution line is stored on the top of a utility pole.
Install the installed transformer pedestal on the top of this transformer pedestal.
Is the primary and secondary side that connects to the distribution line through the device
The cable connector for the
At the position corresponding to the cable connector on the bottom plate of the
Primary and secondary lead wires derived from the transformer body
Install the connected primary and secondary device side connectors.
When the mounted transformer is mounted and fixed on the transformer pedestal,
At the same time, attach / detach the device side connector to / from the cable connector.
And then electrically connect the transformer to the distribution line.
A protective cover is placed on the outside of the transformer to cover it.
A pole- mounted transformer device characterized by being detachably attached to a stand .