JPH02889Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention connects the high-voltage side and low-voltage side ducts to the upper duct installed at the top of the transformer, and runs the lead-in cable and the cable connected to the load through these ducts. This invention relates to a transformer device with a duct connected to a transformer.

Prior Art Conventionally, for example, when configuring a transformer device as power receiving power equipment, an upper duct is arranged to surround a high voltage bushing and a low voltage bushing protruding from the upper surface of the cover of the transformer, and the Connect the high-voltage side and low-voltage side ducts to the mounting flanges provided on the two sides, and connect the lead-in cable from the high-voltage distribution line and the cable connected to the load to the transformer by passing them through the high-voltage side duct and the low-voltage side duct, respectively. ing. In addition, the high-voltage side duct has a high-voltage switch inserted between the service cable and the transformer, and the low-voltage side duct has a low-voltage switch and disconnector inserted between the transformer and the cable connected to the load. Each room houses measurement instruments for load monitoring. However, in the conventional transformer device of this type, only two mounting flanges were provided on the upper duct, so the mounting direction of the high-pressure side duct and the low-pressure side duct was inevitably limited. Therefore, it is necessary to manufacture an upper duct with a mounting flange in a different position depending on the installation location, which has the disadvantage of increasing the cost of the device.

Purpose of the invention An object of the present invention is to provide a transformer device in which the mounting directions of the high-voltage side duct and the low-voltage side duct can be changed as appropriate.

Structure of the invention The present invention provides a transformer, an upper duct disposed above the transformer, a high voltage side duct and a low voltage side duct connected to the upper duct, and connects a lead-in cable and a load. is connected to the transformer through the high-voltage side duct and the low-voltage side duct, respectively, and in the present invention, the upper duct has four openings on the front, rear, left, and right sides, and each opening is connected to the transformer. are provided with mounting flanges of the same size and shape, and two of the four mounting flanges are connected to flanges provided on the side surfaces of the high-pressure side duct and the low-pressure side duct, respectively. The other two mounting flanges are closed with blind covers.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Figures 1 and 2 show an embodiment of the present invention, and in these figures 1 is a box-shaped case 2.
This is a transformer in which the transformer body is housed inside and a heatsink 3 is attached to both left and right sides of the case 2.A high-voltage side bushing 5 is also installed on the left side of the top surface of the cover 4 of the case 2 of the transformer. Low pressure side bushings 6 are respectively attached to the right side. Reference numeral 7 denotes an upper duct placed above the transformer 1, and the main body portion 8 of this duct is formed into a box shape. The lower surface of the main body portion 8 of the upper duct is open toward the cover 4 side of the transformer 1, and the periphery of the lower surface opening of the main body portion is joined to the periphery of the upper surface of the cover 4. Rectangular openings with the same size and shape are provided on the front, rear, left and right sides of the upper duct 7, and rectangular openings with the same size and shape are provided around the openings through branch ducts 9 to 12 having a rectangular cross section. Shape mounting flanges 13 to 16
is installed. Further, a working opening is provided on the upper surface of the upper duct 7 for connecting cables in the upper duct and performing maintenance and inspection work on the transformer. It is closed by 18. In this embodiment, a high voltage side duct 20 and a low voltage side duct 21 are arranged on the left and right sides of the transformer 1, respectively. The high-pressure side duct 20 and the low-pressure side duct 21 are formed in a vertically long box shape, and the upper side surfaces of the high-pressure side duct 20 and the low-pressure side duct 21 have openings that are approximately the same size and shape as the openings on the front, rear, left, and right sides of the upper duct 7. A mounting flange 13 to 1 is provided on the periphery of the opening.
Flanges 22 and 23 are provided which can be connected to 6. Projections 22a and 23a are provided so as to frame the peripheral edges of the flanges 22 and 23, and the projections 22a and 23 of these flanges
Any of the mounting flanges 13 to 16 can be fitted inside of a. In this embodiment, the flange 22 of the high-pressure side duct 20 is connected to the mounting flange 15 of the upper duct 7 with bolts, and the flange 23 of the low-pressure side duct 21 is connected to the mounting flange 16 with bolts. As described above, if the structure is such that a protrusion is provided on the periphery of the flange and the mounting flange is fitted inside the protrusion, alignment of the flanges 22 and 23 and each mounting flange is facilitated. It can be done. High pressure side duct 20 and low pressure side duct 21
Front-opening doors 24 and 25 equipped with handles 24a and 25a, respectively, are attached to the opposite side of the flanges 22 and 23 so that they can be opened and closed, and by opening these doors, the equipment inside both ducts can be inspected. It is becoming possible to do so. A high voltage switch 30 such as a cutout switch or a vacuum shield is housed in the high voltage side duct 20, and one lower end of the switch 30 is connected to the high side pressure bushing 5 through a cable 31. The other end upper end of the switch 30 is
The support member 3 is drawn into the high pressure side duct 20 through the hole 32 provided on the lower surface of the high pressure side duct 20.
3 and is connected to one end of a drop-in cable 34 extending through the rear side of the switch 30, and the other end of the drop-in cable 34 is connected to a high-voltage distribution line (not shown). A low voltage shield breaker 35 such as an electromagnetic switch and a current transformer 36 for measuring load current are housed in the low voltage side duct 21, and a cable 37 connected to one end of the shield breaker 35 is connected to the current transformer. 36 and is connected to the low pressure side bushing 6. The other end of the cable disconnector 35 is connected to one end of a cable 39 supported by a support member 38, and the other end of the cable 39 is connected to a hole 40 provided on the lower surface of the low voltage side duct 21.
It is connected to a load (not shown) through it. Measurement instruments for load monitoring, such as an ammeter, are also housed in the low-voltage side duct 21, and the instruments are placed on the door 25 side in a position that is close to the door 25 and does not interfere with the operation of the disconnector. is placed towards.

Mounting flanges 13 and 14 provided on the front and rear sides of the upper duct 7 are closed by blind covers 41 and 42, respectively. These blind lids 41
and 42 are rectangular plates with protrusions 41a and 42a similar to the protrusions 22a and 23a of the flanges 22 and 23 formed along the periphery of one side, and inside the protrusions 41a and 42a. The blind covers 41 and 42 are bolted to the mounting flanges 13 and 14 with the mounting flanges 13 and 14 fitted therein, respectively. By forming the blind lid in this manner, it is possible to easily align the blind lid and the mounting flange. Further, handles 43 and 44 are attached to the outer surfaces of the blind lids 41 and 42, respectively. A viewing window (not shown) is provided at the top of the door 25 for monitoring the measuring instruments from outside the door.

In the above embodiment, if there is no space to arrange ducts on the left and right sides of the transformer 1 due to the installation location, the high voltage side duct 20 and the low voltage side duct 21 may be installed on the mounting flanges 14 and 13, respectively. Can be connected. In this way, in this invention, mounting flanges are provided on the front, rear, left, and right sides of the upper duct for attaching the high-pressure or low-pressure side duct, so that by preparing only one type of upper duct as a standard product,
It can be adapted to the conditions of any installation location.

In the above example, doors were provided at the front openings of the ducts on the high-pressure side and the low-pressure side, but it is not necessary to provide doors on these ducts, and the front openings of these ducts are secured by screwing steel plates etc. The section may be closed.

In the above embodiment, the low pressure switch 35 is placed in the low pressure side duct 21 away from the door 25, but as shown in FIG. It is mounted close to the inner surface of the door 25 through the door 25 so that the operation knob 35a of the external mustard cutter 35 can be operated with the door 25 closed.
The operating knob 35a may be made to protrude outside through a window provided in the door.

In the above embodiment, the high voltage switch 30 was housed in the high voltage side duct 20, but as shown in FIG.
A switch box 46 may be connected to the upper part of the upper duct 7 and the high voltage switch 30 may be housed in the switch box, and the high voltage side duct 20 may be used to guide the lead-in cable 34. In this case, the switch box 46
An opening for inspection is provided in the upper part of the housing, and the opening is closed with a blind lid 47 provided with a handle 47a.

Effects of the invention As described above, according to the invention, mounting flanges for connecting the high-voltage side duct or the low-voltage side duct are provided on the front, rear, left, and right sides of the upper duct provided at the top of the transformer. The installation direction of the high-pressure side and low-pressure side ducts can be changed depending on the installation location. Therefore, by preparing only one type of standard upper duct, it is possible to correspond to the conditions of various installation locations, and it is possible to reduce the cost of the transformer device. Also high,
Since the low voltage side duct can be installed in a manner appropriate to the installation location, the installation area of the transformer device can be reduced.

[Brief explanation of the drawing]

1 and 2 are a partially sectional top view and front view of an embodiment of the present invention, respectively;
The figure is a partially sectional front view showing the main part of another embodiment of the present invention, and FIG. 4 is a front view showing the main part of still another embodiment of the invention. 1...Transformer, 7...Upper duct, 13 to 1
6...Mounting flange, 20...High pressure side duct,
21... Low voltage side duct, 22, 23... Flange, 34... Lead-in cable, 39... Cable connected to load.

Claims (1)

[Scope of utility model registration request] It includes a transformer, an upper duct disposed above the transformer, and a high-voltage side duct and a low-voltage side duct connected to the upper duct, and a lead-in cable and a cable connected to a load are respectively arranged in the high-voltage side duct. and a transformer device connected to the transformer through the inside of the low voltage side duct, mounting flanges having the same size and shape are provided on the front, rear, left and right sides of the upper duct, and among the four mounting flanges, A transformer characterized in that flanges provided on the sides of the high pressure side duct and the low pressure side duct are connected to the two mounting flanges, respectively, and the other two mounting flanges are closed by a blind cover. equipment.