JP3482143B2 - Transformer with tap lead wire and disassembly and transportation method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer with a tap lead wire and a method for disassembling and transporting the transformer, and more particularly to a transformer with a tap lead wire.
Tap suitable for being unassembled, transported, and reassembled locally
The present invention relates to a transformer with a lead wire and a method for disassembling and transporting the transformer.

[0002]

In recent years, transformer to be used for the substation transmission with the increase in power demand has also been high-voltage, large capacity, further by land prices soaring, the transformer also transport condition is more severe mountainous areas It tends to be installed in underground areas such as Tokyo. That
Therefore, it requires a significant reduction in its transport dimensions and weight.

Conventionally, such a location by <br/> a transformer to be installed in, for example, in the case of a three-phase transformer, divided and transported in <br/> the three single-phase transformers, three-phase tank or the common duct connecting coupling each of single-phase transformer by on site, split transport transformer configured as a three-phase transformer by performing the three-phase connections
There is a vessel .

[0004] In this case, in the local after rail or ship transport
Is on the occasion of the trailer transportation, becomes necessary road reinforcement work, including the reinforcement of large-scale bridges, there is a huge transportation costs, such as is required problem.

[0005] Therefore, when the transport constraints are particularly severe, the transformer iron core legs factory assembly, the upper and lower yokes is divided into each part of the winding, etc., decomposition <br/> assembling them again on site there is a transportation Okukata formula.

In this system, the iron core, which is the heaviest component, is disassembled and transported, so even an iron core with a total weight of 100 tons can be transported with a trailer of about 20 tons, thus eliminating restrictions on transportation. It can be transported without road reinforcement.

In this case, however, as in the case of factory assembly, after the iron core is laid down and the lower yoke is completely piled up on site, a large-scale erection facility for erection of the iron core having a weight of more than 100 tons and supporting and installation thereof are installed. Foundation work to attach is required.

Therefore, since the apparatus for standing up is also disassembled and transported, it is necessary to assemble and stand up on site and then disassemble and transport again. Installation time tends to increase. This is due to the fact that it takes a lot of time to install and connect the internal parts and the number of transportation parts is large.

Regarding the disassembling and transporting transformer, Japanese Patent Laid-Open No. 5-1
It is described in Japanese Patent No. 35955. This decomposition transport transformer is arranged non-voltage tap changer into the upper tank, this amount, increases the height of the decomposition transport transformers, transformer transportation limit problems.

[0010]

Generally, the restrictions on transportation of transformers are mainly weight restrictions and size restrictions. In particular, due to restrictions on the height of a tunnel in a mountainous area or a guard in a town, the structure of the transformer is restricted. Since it is often decided, even if a low-floor trailer is used, the transportation height limit cannot be cleared, and there is no choice but to use the subdivision decomposition transportation transformer method, and large-scale transportation equipment is required.

[0011] Also, in the re-assembly work on site, since the internal s goods are also decomposed and transported, there is a problem reattached and connection work man-hours on site increases.

An object of the present invention reduces the reassembly time in the field, to provide the transformer with taps leads can be performed easily site work and its degradation transportation method
There is .

[0013]

In the present invention , the above object is achieved.
To achieve each of the iron cores in a bottom tank placed on the base
The transformer contents, in which each phase winding is wound around the main landing gear, are installed.
And the tap lead wire extends upward from each phase winding.
And attach a middle tank on the bottom tank,
The upper tank is removably placed on the middle tank.
A transformer that is installed in the upper tank.
The tap lead wire connected to the output wire is arranged and the
The lead wire is attached to the fixing plate in the upper tank.
It is fixed and at the end of the tap lead wire of each phase
Connection tank is provided and the upper tank unit is configured
Transformer with tap lead wire . And the bottom tab placed on the base
Transformer in which each phase winding is wound around each main leg of the iron core
The contents of the vessel are installed and tapped from each phase winding.
Extend the output line upwards, and in this state, place it above the bottom tank.
A tank is attached, and an upper tank is placed on the middle tank.
When transporting a transformer that is detachably mounted,
Compressor for iron core, winding, bottom tank, middle tank, upper tank
Each of them is disassembled, and the upper tank is
The tap lead wire connected to the tap lead wire is placed in
The tap lead wires for each phase are installed in the upper tank.
It is fixed to the fixed plate that is
A connection terminal is provided at the end of the
Tap lead that is disassembled and transported as a package
It is characterized by the method of disassembling and transporting the transformer with a wire .

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present onset based on embodiments shown
Explain the Ming . FIG. 1 is a transformer with a tap lead wire according to the present invention .
An example of a container is shown.

The transformer as shown in the drawing, the main leg 1U of 5-legged iron core 1, 1 V, 1W in three-phase windings 2U, 2V, mounted 2W
Then the contents of the transformer are configured. 5-legged iron core 1 corner and each main landing gear 1U, 1 V, core plate of contact with the 1W (not shown) to tighten fastening bracket 1A, a 5-legged iron core 1 three-phase windings 2U, 2V, 2W is fixed. Install the above transformer contents in the bottom tank 3A placed on the base 3 and
Phase winding 2U, 2 V, 2W or Rata-up lead lines 4U, 4V,
Extend 4W upward kicking Attach the middle tank 3B on the bottom tank 3A in this state. An upper tank 3C is detachably arranged on the middle tank 3B. Medium tank 3B
Reinforcing stays 3X are provided on the outer circumference of to increase the mechanical strength.

The upper tank unit 3 in the upper tank 3C shown in FIG. 2 is constructed as follows. That is, the tap lead wires 5 connected to the tap lead wires 4U, 4V, 4W are arranged in the upper tank 3C, and the tap lead wires 5 of each phase are fixed to a fixing plate 6 provided in the upper tank 3C. A connection terminal piece 5A is provided at the ends of the three-phase tap lead wires 5U, 5V, 5W.

An insulating terminal plate 8 is attached to an end portion of the upper tank 3C on the tap changer 7 side under load, and the connecting terminal piece 5 is attached to the connecting terminal 9 of FIG. 3 attached to the molded insulating terminal plate 8.
A is connected. Attach the LTC tank 11 for containing the load tap changer 7 on the other side surface of the insulating terminal board 8. LTC lead line 1 from the load tap changer 7
2 Ru is connected to the connection terminal 9 on the other side. Upper tank 3C
The contact surface between the LTC tank 11 and the LTC tank 11 can be attached and removed freely.

Next, the case of transporting the disassembling and transporting transformer 10 will be described. After completing the disassembling and transporting transformer 10 shown in FIG. 1 at the manufacturing plant, for example, when transporting it to a substation,
5-leg iron core 1, 3-phase winding, bottom tank 3A, middle tank 3B,
The upper tank 3C is disassembled, and the transportation cover 3Y is attached to the lower surface side of the upper tank 1 to transport it to the site with the inside of the tank sealed. Reassemble each part again at the substation,
The disassembly and transportation transformer 10 is completed.

In this case, in the present invention, since the upper tank 3C is transported with the upper tank unit 3 as it is, in particular, a large number of connecting terminal pieces 5A are provided as compared with the case where the upper tank unit 3 is disassembled and not transported. The work of attaching and detaching the connection terminal 9 is omitted, and the connection time can be greatly shortened.

[0020] In further reference to FIG. 4 to FIG. 5, each phase of the tap leads 5U, 5V, the relationship between the connection terminals 9 of 5W and molded insulating terminal board 8 will be described.

The three-phase windings 2U, 2V, on one side <br/> tap leads 5 U of 2W, 5V, 5 W and the other side of each phase of the tap leads 5 U', 5V', the 5W ' Blocked accordingly, the tapped lead wires 5 U, 5 of each phase that are blocked
V, 5 W regional 5 0U was divided into each, 50V, 50 W and the earth
Pass 5 0V', 50U', provided to best match areas to 50 W 'in the insulating terminal board 8, to connect the connecting terminal strip 5A to the connection terminal 9 digits set in each region.

Therefore, the worker is required to tap the tap lead wire 5 U,
5V, 5 in the case where W is connected to, the division was, for example, the region 5
The connection terminal strip 5A tap leads 5U of 0U, because it Re be connected to the connection terminal 9 regions 50U of the insulating terminal board 8, can determine immediately the destination, as compared with the case where the connection destination is not blocked And the connection work is much faster . Also,
By looking at the blocked area 50U, the worker can immediately know whether or not the connection terminal piece 5A is connected to the connection terminal 9, and can prevent a connection error. Further, by looking at the connection status of the insulating terminal board 8, it is possible to know how far the connection work of the tap lead wire and the LTC lead wire 12 has progressed, and it also serves as a process chart. The disassembling and transporting transformer 10 can be applied to transformers with tap leads other than the disassembling and transporting transformer 10 in this embodiment and the following description.

That is , a large number of LTC lead wires 12 drawn out from the load tap changer 7 in FIG. 6 are divided into regions of the insulating terminal board 8 which are divided into regions and placed in a bundle. 50U, the LTC lead 12 a bundle for each 50W denoted by region 50U, 50 W, further reconnection to the number 1, 2 and 3 were subjected to the connection terminal 9 regions 50U, as shown in Figure 7 regional 50U Since the numbers 1, 2, and 3 of the connection terminal pieces 5A attached to the LTC lead wires 12 may be collated and connected, there is an advantage that connection work is easy.

When the connecting terminals are arranged on the insulated terminal plate 50U which is blocked in the embodiment of FIG. 7, a plurality of first connecting terminals 15 are arranged at a predetermined interval in the first row, and the first connecting terminals 15 are arranged. Corresponding to, the second connection terminals 16 in the second row are arranged. The third connection terminals 17 in the third row are arranged so as to be displaced from the first connection terminals 15 and the second connection terminals 16. That is, the first connection terminal 15, the second connection terminal 16 and the third connection terminal 17 were offset so as not to overlap each other. As a result, when the connection terminal pieces are connected to the connection terminals, the connection terminals and the connection terminal pieces do not overlap with each other and a working space is provided, so that the connection work is easy.

Further, when the line lead wire 18 is arranged between the tap lead wire 5V 'and the tap lead wire 5W', the tap lead wire 5W 'becomes the tap lead wire 5W.
By arranging pulled away on the opposite side, with taking an insulation distance between the line lead 18 and the tap lead 5W', with taps and leads 5W' and line lead wire 18 is prevented from crossing and the . In the above description, the transportation method of the disassembling transportation transformer is referred to, but it may be referred to as the disassembling transportation transformer and the assembling method thereof.

[0026]

As described above, according to the present invention, the
Reassembly time can be reduced and on-site work can be simplified.
it can.

[Brief description of drawings]

FIG. 1 is a side sectional view of a disassembling transportation transformer shown as an embodiment of the present invention.

FIG. 2 is a side sectional view of the upper tank unit shown in FIG.

FIG. 3 is a side sectional view of the insulating terminal board used in FIG.

FIG. 4 is a top cross-sectional view of the disassembled transportation transformer seen from the upper surface of FIG. 1.

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

FIG. 6 is a view showing an LTC lead wire drawn out from the tap changer under load used in FIG. 1;

FIG. 7 is a front view of the connection terminal arranged on the blocked insulating terminal plate used in FIG.

[Explanation of symbols]

1 ... 5-leg iron core, 2U, 2V, 2W ... Winding, 3A ... Bottom tank, 3B ... Medium tank, 3C ... Upper tank, 4U, 4V,
4W ... Tap lead wire, 5A ... Connection terminal piece, 5U, 5V,
5W ... Tap lead wire, 7 ... Tapping switch under load, 8 ...
Insulation terminal board, 10 ... Disassembly transportation transformer.

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-10-223441 (JP, A) JP-A-5-135955 (JP, A) JP-A-8-124752 (JP, A) JP-A-9- 35957 (JP, A) JP 4-186810 (JP, A) JP 7-142267 (JP, A) JP 48-57186 (JP, A) JP 54-101128 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01F 27/02

Claims (5)

(57) [Claims] 1. The main core of an iron core in a bottom tank placed on the base.
The contents of the transformer in which each phase winding is wound on the leg is installed
At the same time, the tap lead wire is extended upward from each phase winding.
And a middle tank mounted on the bottom tank,
The upper tank is removably placed on top of the middle tank.
A transformer connected to the tap lead wire in the upper tank.
Pre-wires are arranged, and tap lead wires for each phase are
When it is fixed to the fixing plate installed in the tank
In addition, a connection terminal is provided at the end of the tap lead wire for each phase.
The upper tank unit is configured as
A transformer with a tap lead wire. 2. Each core of the iron core is placed in a bottom tank placed on the base.
The contents of the transformer in which each phase winding is wound on the leg is installed
At the same time, extend the tap lead wire upward from each phase winding.
Install the middle tank on the bottom tank in this state.
In addition, the upper tank is placed on the middle tank in a removable manner.
When transporting the installed transformer, the transformer may include the core, winding, bottom tank, middle tank, and top tank.
And the upper tank is
Tap lead wire connected to the tap lead wire in the link
Are arranged in the upper tank.
Is fixed to the fixing plate provided on the
The upper tank is equipped with a connection terminal at the end of the lead wire.
A tap characterized by being disassembled and transported as a unit
Disassembling and transporting transformer with lead wire. 3. A winding having an iron core wound around a transformer tank.
Multiple phases are arranged from one side and the other side of each phase winding
The tap leader line was drawn out and connected to the tap leader line.
Block the tap lead wire from one side and the other side,
Blocked multi-phase tap lead wires are divided for each phase
The divided taps are switched to the upper part of the tank when the load is applied.
An insulating terminal plate attached to the end of the device is provided.
Connect the tap lead wires to the connection terminals provided in the divided areas.
Transformer with tap lead wire characterized by being configured successively
vessel. 4. The area of the insulated terminal board is defined as the divided area.
Tap lead from the tap changer under load according to the range
The tapple according to claim 3, wherein the tapers are bundled for each line.
Transformer with lead wire. 5. The connection terminals blocked for each of the connection terminals include a plurality of first connection terminals arranged at a predetermined interval in a first row and a second row arranged so as to be offset from the first connection terminals. a second connecting terminal, wherein the first connecting terminal and the third column of the third connecting more made it features a terminal which is arranged offset from a second connection terminal between the first and second columns 3. tap transformer with lead wire according.