JPH0343694Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an elephant type oil-immersed transformer, and particularly to a lead wire extraction structure thereof.

A conventional elephant-type oil-immersed transformer of this type was constructed as shown in FIGS. 1 and 2. That is, in FIGS. 1 and 2, 1 is a tank that stores the transformer main body 2 and insulating oil 3; 4 is a high-voltage side elephant case that is attached to the tank 1 and stores a high-voltage side lead wire 5 and insulating oil 6; 7 is a partition plate provided between the tank 1 and the high-pressure side elephant case 4; 8 is a cable head for the high-pressure side lead wire; 9 is a connection between the high-pressure side elephant cases 4 and a pressure relief valve 10 is attached thereto. It is a connecting pipe. 14 to 20 are parts 4 to 10 on the high pressure side, respectively.
14 shows the low-pressure side elephant case, 15 the low-pressure side lead wire, 16 the insulating oil, 17 the partition plate, 18 the cable head, 19 the connecting pipe, and 20 the pressure relief valve. It is.

In such a conventional case, the elephant cases 4 and 14 have lead wires 5 and 1 on both the high pressure side and the low pressure side.
The oil in the tank 1 and the oil in the elephant cases 4 and 14 are separated by the partition plates 7 and 1.
7, connecting pipes 9, 19 and pressure relief valves 10, 20 must be provided in the high-pressure side and low-pressure side elephant cases 4, 14, respectively.

This idea is an attempt to eliminate these drawbacks of the conventional ones. By combining the high-pressure side and low-pressure side elephant cases into one and simplifying it, and by combining each phase into one, the high-pressure side and low-pressure side elephant cases are To provide an elephant type oil-immersed transformer which eliminates the need for a connecting pipe connecting cases and has one pressure relief valve instead of two.

An embodiment of this invention will be described below with reference to FIGS. 3 and 4. That is, in FIGS. 3 and 4, 24 is attached to the tank 1, and has a high voltage side lead wire 5, a low voltage side lead wire 15, and an insulating oil 26.
Elephant case 27 is used for both high pressure side and low pressure side to store tank 1 and elephant case 24.
A partition plate 30 provided in between is a pressure relief valve provided in the elephant case 24. The rest of the configuration is the same as the conventional one shown in FIGS. 1 and 2, so the explanation will be omitted.

With this structure, the high-pressure side elephant part and the low-pressure side elephant part are pulled out in the same direction from a common elephant case, unlike the conventional model in which the high-pressure side elephant part and the low-pressure side elephant part were pulled out in the same direction. The multiple elephant cases on both the side and low pressure side become one, and the connecting pipe 9,
19 is not only unnecessary, but also the high pressure side pressure relief valve 10
What used to require two pieces, the one and the low-pressure side pressure relief valve 20, is now
It is possible to use 301 common pressure relief valves.

As mentioned above, the elephant-type oil-immersed transformer according to this invention connects the elephant case to the transformer body and the tank that stores the insulating oil through a partition plate, and connects the high-voltage side lead wire and the low-voltage side lead wire to the elephant case. and contains insulating oil.
The structure is simple and inexpensive.

[Brief explanation of drawings]

Figures 1 and 2 show a conventional device; Figure 1 is a front view, Figure 2 is a side view, and Figures 3 and 4 are one embodiment of this invention;
FIG. 3 is a front view, and FIG. 4 is a side view. In the figure, 1 is the tank, 2 is the transformer body, 3 is the insulating oil, 5 is the high voltage side lead wire, 15 is the low voltage side lead wire, 24 is the elephant case, 26 is the insulating oil,
27 is a partition plate, and 30 is a pressure relief valve. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A tank that stores the transformer body and insulating oil, a single elephant case that is connected to this tank via a partition plate and stores the high-voltage side lead wires and low-voltage side lead wires of each phase and the insulating oil, and this elephant case. Elephant type oil-immersed transformer with a single pressure relief valve provided.