JPS58100407A - Power supply unit - Google Patents

Abstract

PURPOSE:To provide a power supply unit small in size and easy in maintenance by a construction wherein a coil and high pressure bushings are integrally resin- molded such that the bushings are formed at the side of the coil, and two units of power supply transformers are housed in the same tank. CONSTITUTION:A core 3 and a coil 2 of a power supply transformer are integrally molded with resin 8 such as epoxy resin, and at the same time bushings 22 are formed at the side of the coil. Provided in the bushings 22 are recessed terminals 21 to which high pressure terminals U, V, W are connected, while low pressure terminals u, v, w are provided on the opposite side. The figure shows the construction of the power suppy unit. The interior of a tank 5 is divided by a partition plate 5-3 into two chambers, and each of both side plates 5-1 is provided with three holes through which the bushings 22 are led out to the exterior. Since auxiliary units are mounted onto the external surface of the tank, it becomes possible to reduce the volume of the entire power supply unit and to easily maintain the auxiliary units.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to an electric power distribution automation system and an improvement of a power supply device installed on a column with a vacuum interrupter and an accident investigation device.
It is related to

Technical Background of the Invention In a power distribution system, a plurality of dividing points are provided at appropriate distances on distribution lines, and when an accident occurs in any section of the distribution line divided by these dividing points, the accident section is automatically Nine distribution line automation systems have been put into practical use that detect faulty areas and automatically transmit power to healthy sections other than the affected sections.

Here, each division point provided on the above distribution line includes an accident investigation device that investigates the accident section, a vacuum interrupter (hereinafter referred to as V and S) that opens and closes the electromotive line, and a power source that supplies control power output to both. It consists of two devices, together with an arrester.
Each one is attached to a telephone pole.

FIG. 1 is a conceptual diagram showing the wiring of these devices. 1st
In the figure, 301 is the distribution line on the power supply side, 302 is the distribution line on the load side, and 201 is the distribution line on both of these distribution lines 301 and 302.
Vacuum interrupter provided between (hereinafter simply referred to as v, S)
It is. Also, 101 is the power supply side power distribution line 301 and the load side power distribution line @302? ) This is a power supply device that receives 3-phase 6600V power and converts it to 100V DC to obtain a controlled power output. 202 is an accident investigation device that receives the control power output obtained from the power supply device 101 and gives opening/closing commands to V and S 201. Furthermore, 303 is the power supply side power distribution line 30
The arrester is connected to the power distribution line 302 on the load side and the power distribution line 302 on the load side.

As shown in Fig. 3, these devices constituting the demarcation point include two arresters (SOS), one (R) V, F3201, two power supplies 101, and one A total of six accident investigation devices 202 are each installed.

By the way, as mentioned above, the conventional power supply device 1 is installed on the pillar together with the V, 8j Of, and the accident investigation device 202.
01 has a structure as shown in FIGS. 3(a) and 3(b). That is, Fig. 3(a)
In I (b), 102 is a tank, and this tank 1
A partition plate 113 is provided at the middle of 0X and closer to the bottom plate, forming two chambers, an upper chamber and a lower chamber. A power transformer 105 is housed in the upper chamber of the tank 102, and a no-fuse breaker (hereinafter MC) is housed in the lower chamber.
(referred to as CB) 115 and a rectifier 114 are housed therein. Further, 103 is a cover that closes the upper opening of the tank 102, and this cover 103 is attached by a spring 109 provided on the upper outer surface of the tank 102 via a hinge (not shown).゛In this case, the spring 109 is attached to a tightening fitting 108 and a guide fitting 11 welded to the outer surface of the tank at appropriate intervals.
The bolt 110 is further welded to the cover 103, and from the tightening fitting 107 side, the bolt 110 is passed through the aforementioned tightening fitting 10B, the sedge ring 109, and the guide fitting 111, and the guide fitting 111 and the spring 109 are connected. A nut 11 that threads through the threaded part of the bolt 110 between the lower end and the lower end.
It is tightened by 2. Therefore, this nut 1
12 up the threaded part of the bolt 110.

By screwing downward, the tightening force of the cover 103 by the ring 109 can be adjusted.

On the other hand, U, V, and W are high voltage terminals of the power transformer 105,
Each of the lead wires penetrates the side surface of the tank 103 and is led out to the outside of the tank through high-pressure bushings 104 corresponding to each phase.
It is connected to the distribution line. 106 is the rectifier 11
This Hiji line is for extracting DC 100V output from 4! 06 penetrates the bottom of the tank and is led out to the outside, and is connected to the operating coils v and S via an accident investigation device (not shown).

Reference numeral 116 denotes a handle for operating the MCCB Z 15 from the outside, and this handle 116 is provided on the bottom of the tank 103 to facilitate operation when it is attached to a telephone pole. Here, the above MCCB I
Jj has the function of opening and closing the DC toovo circuit and protecting each device from overload and short-circuit accidents on the low voltage side.

Therefore, in the power supply device with this configuration, a protective fuse is not provided in the electrical path connecting the power transformer 105 and the 6600V distribution line, so if a short circuit between high voltage lines occurs in the tank, the internal pressure will rise. /f-10
3 uses the elastic force of Sgeling 109 to attach tank 1.
02, so even if the pressure inside the tank increases, the spring 109 will be compressed and the cover 103 will move above the tank, allowing the pressure inside the tank 102 to be safely released to the outside. .

Problems with the Background Art However, as mentioned above, in the conventional power supply device, the tank 102
In order to introduce a voltage of 6600V into the tank via the high-voltage bushing 104, a power transformer 105 is connected to the tank upper chamber 111.
When the internal pressure increases due to a short circuit between the high-voltage side and the high-voltage side, the internal pressure must be released to the outside through the cover 103, and it is necessary to ensure sufficient space for insulating the upper chamber 16 and 42. Ru. Therefore, there is a drawback that the entire power supply device becomes large in size. Also, from the above, MC
The CB I J 5, rectifier 114, and other capacitors and resistors (not shown) must be housed in the tank upper chamber 118, which has disadvantages such as difficulty in maintenance such as replacement of these parts. be.

On the other hand, as is clear from Fig. 2, two of the above-mentioned power supply devices are attached to one utility pole 304 in correspondence with the power supply side distribution line 301 and the load side distribution line 312, and two arresters are also installed on one utility pole 304. In addition to the SOS and 1st grade accident investigation device 202 being attached to the same utility pole 304, a pole-mounted toilet pressure device is also attached.

Due to this rounding and the poor workability of mounting each piece of equipment on the pole,
In particular, there is a strong demand for downsizing of power supplies.

OBJECTS OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks, and its purpose is to provide a power supply device that is compact and easy to maintain.

SUMMARY OF THE INVENTION Therefore, in order to achieve the above object, in the present invention, an iron core and a coil wound around the iron core are integrally molded with resin so that at least a high-voltage bushing is formed on the side of the coil together with the coil. Two power transformers are housed in the same tank with their high-voltage bushings facing in opposite directions, and their high-voltage bushings are passed through the side of the tank and led out to the outside of the tank. Additionally, accessory equipment can be attached to the outside of the tank.

Embodiment of the Invention An embodiment of the present invention will be described below with reference to FIGS. 114 to #I7. Figure 4 shows a semi-finished product of a power transformer, which is the main equipment of this power supply. Although not shown in the jFi two-leg iron core leg, there is a low-voltage coil on the inside and a high-voltage coil on the outside coaxially. There are two coils wound in such a way that they are arranged. These coils 2 are three-phase-V connected, and high-voltage terminals U, V, W and low-voltage terminals u, V, W are led out, respectively.

The iron core 3 and coil 2 of the power transformer 1-1 having such a configuration are integrally molded with a resin 8 such as epoxy resin, and at the same time, a bushing 22 is formed on the side of the coil. A tulip contact date terminal 21 is provided in this bushing 22, and high voltage terminals U, V, and W are connected to this. Further, on the side opposite to the bushing side of the coil 2, a low voltage terminal U and a terminal 9w are provided during molding.

FIG. 6 shows the configuration of a power supply device in which two power transformers 1-1 molded as described above are housed in one tank. In FIG. 6, reference numeral 5 denotes a tank whose interior is partitioned into two chambers on the left and right in the figure by a partition plate 5-3.
311 holes are provided in each case for leading out the water to the outside, and the bottom plate 5-2 is made of fine wire mesh or one with many small holes. Further, four bolts 11 are vertically mounted and fixed to the upper surface plate 6-5 of the tank 6 so as to be parallel to each other with appropriate intervals, and the bolts 11 are connected facing each other and connected between each other. are connected by two band-shaped plates 12, and each is tightened and fixed by a tightening nut 13, thereby forming a suspension section for mounting on a utility pole.

Here, a procedure for housing the two power transformers 1-1 in the tank 5 and assembling the power supply device will be described. First, with the top plate 5-5 removed, the two power transformers 1-1 formed in the tank 5 are housed separately. In this case, each power transformer 1-1 is arranged so that the three bushings 22 on the coil sides thereof penetrate to the outside through holes provided in the side plate 5-1 of the tank 5. As a result, the stain source transformer 1-1 is fixed by the shipping member 22 passing through the side plate 5-1 of the tank 5 to the outside. Next, after housing the power transformer 1-1 in the tank 5, its top opening is blocked with a top plate 5-5, and this top plate 5-4 is installed on the tank 50 side (not shown). It is fixed to the attached dog band 5-4 by cult tightening or welding. On the other hand, 7 is a molded cone molded with rubber with good weather resistance and tracking resistance, and inside it is a convex terminal 7-1 for a tulip contact and a core wire 7-1.
2 is molded. The inner dimensions and shape of the molded cone 1 are such that it is in close contact with the bushing 22 to the extent that a slight compressive force is applied thereto.

Such a mold coat/1 is attached to the tank side plate 5-1 of the bushing 22 portion in the following manner. That is, the hole 7 provided in the flange portion of the mold code 7
3 is inserted into the nine studs 19 provided on the tank side plate 5-1, and is attached by tightening them with nuts 20.

Also, on the front or back of the tank 5, there is a seal as shown in Fig. 7 (a).

Case 6 is installed as shown in Fig.
The MCCB J 6, a rectifier 11, and a resistor inside a capacitor for surge absorption (not shown) are housed inside. In this case, the low voltage terminals 1s-u, 16- of the power transformer 1-1
1.5-W is provided on the front or back of the tank 5 corresponding to the depositing part of the case 6, and from this the MC in the case 6 is
It is connected to the rectifier 17 via CB J If. 1o
is provided on the outside of case 6 and has 9 MCC! 1g, and 18 is a J-shaped outlet cable that takes out the DC output obtained from the rectifier 11 to the outside of the case C. This outlet cable 18'' is used to connect an accident investigation device (not shown). It is then connected to v and s.

Please note that the equipment stored in case 6 is sensitive to moisture.
Case 6 is made airtight.

Next, the effects of the power supply device configured as described above will be described in comparison with the conventional power supply device.

In conventional power supply equipment, the power transformer was housed in the upper chamber inside the tank, and this power transformer was connected to the 6600V distribution line via a high-voltage bushing, so the upper chamber inside the tank only housed the isolation transformer. In this case, the volume and weight would only be doubled, which would not make it smaller, but would only make it more difficult to attach it to a utility pole. On the other hand, in the power supply device according to this embodiment, two power transformers 1-1 are integrally molded with resin so that a high voltage bushing is formed on the side of the coil together with an iron core and a coil wound around the iron core. are stored in the tank 5 and each bushing 22 is attached to the left and right side plates 5 of the tank 6.
Since it is led to the outside through the hole provided in -1, there is no need for space to insulate the high voltage line connected to the 6600V distribution line, so the entire device can be made smaller. . In addition, the lead-out portion of the shishing 22 that leads out from both sides of the tank 5 is made of ethylene globulin fm (IcPT is called futo), which has excellent properties such as weather resistance and tracking resistance. Since the molded cone 7 is covered and fixed to the side of the tank, it can be used outdoors even if the bushing 22 is molded with resin, which has insufficient weather resistance and tracking resistance. can fully demonstrate its functions. Furthermore, as shown in FIG. 8, when the power supply device according to this embodiment is attached to a utility pole 304, the size of the power supply device is equal to or slightly smaller than V and S201,
Since the bushings 22 are symmetrically led out from both the left and right sides of the tank 5, the appearance can be greatly improved compared to the conventional one. 9.As shown in Figure 2, the conventional power supply device had to be mounted on two poles, but the power supply device according to this embodiment is composed of one unit, so the time required to mount it on the pole is shorter than that of the conventional power supply device. Compared to that, it can be reduced by 3AK. Furthermore, power transformer 1-
1 has the iron core 3 and coil 2 integrally molded, so it has good moisture resistance, and the bottom plate of the tank 5 is made of a material with many small holes or a wire mesh to prevent pressure inside the tank at the time of an accident. Since the tank itself is designed to allow water to be released to the outside, there is no need for the tank itself to have a function such as a safety valve.

On the other hand, conventional power supplies are manufactured with the same structure for standardization purposes, so when mounted on a pole as shown in Figure 2, the operation handles on the left and right power supply units are It will be difficult to operate the steering wheel as it will be on the wrong hand, but
As shown in FIG. 7, the handle of this embodiment is set in the opposite direction in advance, so that the handle can be easily operated. Furthermore, since the MCCB, rectifier, and other parts are housed in a case attached to the outer wall of the tank, work efficiency such as inspection and replacement can be improved.

Next, other embodiments of the present invention will be described.

In the above embodiment, as shown in Figures 5 (a) to (c), the iron core 3. We have described the case where the coil 2 is integrally molded with the resin 8, and Fig. 9 (1) I (b)
As shown in the figure, only the two coils 2 are integrally molded with Lennon 8 so that the square hole 23 into which the core is inserted and the bushing 22 are simultaneously formed, and then the core 3 is inserted into the hole 23. It may also be assembled by passing it through. In this case, since the iron core S is not molded, it will easily rust if outside air enters the tank 6. Therefore, Fig. 7(a) I (
The bottom plate of the tank 5 described in b) may have a structure that seals the tank 6 without using a perforated bottom plate, a wire mesh, or the like. The valve 5 is configured to function as a safety valve for releasing the internal pressure of the tank, as in the conventional case.

Effects of the Invention As described above, according to the present invention, among the iron core and the coil wound around the iron core, at least the high-voltage bushing is formed on the side of the coil together with the coil. Two power transformers are housed in the same tank with their high-voltage bushings facing in opposite directions, and the high-voltage bushings are led out to the outside of the tank by passing through the side of the tank, and the attached equipment is Since it is attached to the outside of the tank, the volume of the entire device can be reduced to about 2 times the conventional size, which makes it easier to install columns and improves the appearance after installing the columns. Moreover, a power supply device can be provided that allows easy maintenance of attached equipment.

[Brief explanation of the drawing]

Figure 1 is a connection diagram of equipment that makes up the division points of a power distribution automation system, Figure 2 is a diagram showing the installation state of equipment that makes up the division points of a conventional power distribution automation system, and Figure 3 (a) t
(b) is a partially cutaway plan view and front view of a conventional power supply device, FIG. 4 is a front view of a semi-finished product of a power transformer according to an embodiment of the present invention, and FIG. ) to (c) are a front view, a plan view, and a side view of the power transformer in the same embodiment, FIG. 6 is a partially cutaway front view showing an embodiment of the power supply device according to the present invention, and FIG. ) , (b) U A front view and a plan view showing the external shape of the same embodiment, FIG. 8 is a diagram showing the state of mounting the equipment constituting the division point of the power distribution automation system using the device of the present invention, and FIG. 9 (1). (b) is a front view and a plan view of a power transformer in another embodiment of the present invention. 1-1...Power transformer, 2...Coil, 3...
Iron core, 8... Resin, 22... Bushing, 5...
・Tan \ri, 6... Case, 16... No fuse breaker, 11... Rectifier. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 (a) (b) Figure 4 u v W Figure 5 Figure 6 Figure 7 Procedural amendment van"=r-'force 24 Rikimochi 48 Commissioner Shima 1) Haruki Tono1, Patent Application No. 56-198867 2, Name of the invention Power supply device 3, Person making the amendment Relationship with the case Patent applicant: (307) Tokyo Shibaura Denki Co., Ltd. 4, agent 6, details subject to amendment - full text 7, engraving of the details of the amendment (no change in content) = 35-

Claims (1)

[Claims] (1) Of the iron core and the coil wound around this iron core,
two power transformers integrally molded with resin such that at least a coil and a high-voltage bushing are formed on the sides of the coil are housed in the same tank with the high-voltage bushings facing in opposite directions; A power supply device characterized in that the high-pressure bushings are led out to the outside of the tank by passing through a side surface of the tank, and accessory equipment pipes are attached to the outer surface of the tank. (2. In the power supply device according to claim (1), the high-voltage bushing is integrally molded with the iron core and the coil wound around the iron core. (3) The power supply device according to claim 4) A power supply device according to claims (1) and (2), in which the tank has a number of holes in its bottom plate. (4) Claims (1) and (2) above. The power supply device according to item (2), which has a tank expansion and sealing structure and is equipped with a pressure relief valve function capable of releasing internal pressure to the outside.