JPH04130706A - Tap changer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tap changing device used for changing taps of transformers, etc., and particularly to an improved structure of a current-carrying connection part.

[Conventional technology]

In general, to connect the current-carrying parts of a tap changer used for changing taps in a transformer, etc., each tap is connected to a conductor such as a copper plate, a screw-like part, or an elastic fastening member. As a conventional technology of this kind,
In addition to making the tab easier to move, the contact portion between the conductor and the lamp portion is formed into a chevron shape, so that the tab is held in place by an appropriate holding force. Also,
Contact pressure is maintained and a reliable electrical connection is made by tightening screw members such as nuts that are conventionally attached in the same number as the number of screw members.

[Problem to be solved by the invention]

In the above-mentioned prior art, a screw or an elastic body is used to obtain an appropriate contact pressure, but in the case of FIG. When the number of taps is 3 or more, two can be reliably connected due to variations in the dimensions of the taps, but the remaining 111 taps cannot obtain appropriate contact pressure, resulting in poor contact. Problem solved.

In addition, in the case of Fig. 6, each tap is tightened by a screw member 31a, and tightening for each tap requires time and effort, and if the operator forgets to tighten the screws when changing taps. This was a problem because there was a risk of poor contact.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a tap switching device that can maintain and tighten electrical contact with a plurality of taps, especially three or more taps.

[Means to solve the problem]

The above seven purposes are for tap switching measures for stationary equipment such as transformers. one of the plurality of taps and the connection conductor is provided with a means capable of sliding in the tap switching direction, and one of the plurality of taps and the connection conductor is elastically supported and the other This is accomplished by a tap changer configured to make crimp contact with the tap changer.

[Effect]

With the above configuration, the connecting conductor is elastically biased to make crimp contact with each of the plurality of taps, and the taps can be switched by sliding the connecting conductor in the tap switching direction.

〔Example〕

Hereinafter, embodiments of the present invention will be described together with the oral surface.

FIRST EMBODIMENT> FIG. 1 is a perspective view showing a first embodiment of the tap switching device of the present invention. By inserting the connecting conductor 1 in the direction of the arrow A, the plurality of U-shaped taps 3, which are biased in the direction of the arrow C by the spring 4 from a direction perpendicular to the through hole 7, are brought into close contact with the connecting conductor 1, respectively. The tap 3 is connected to a tap wire 5 from the coil of the transformer via a flexible conductor (not shown), and is configured so that the tap 3 slides smoothly in the direction of arrow C. .

8(a), (b), (C
). That is, the tap 1 is once displaced in the direction of the arrow as shown in FIG. Smoothly along the shape (C)
As shown in the figure, it is returned to the direction of the arrow and remains stable. At this time, the tap 3 is always pressed in the direction of arrow C by the spring 4 and is in close contact with the side surface of the connection conductor 1, so that the electrical connection is reliably maintained.

According to this embodiment, the plurality of taps 3 are individually connected to the connecting conductor 1 at an appropriate pressure by the biasing of the spring 4, and the taps can be switched in one action, thereby reducing the time and effort required for the tap switching operation. It is possible to save money. Also,
This method is effective in improving reliability because no special tools are required for the operation, and there is no risk of foreign matter getting mixed in when changing taps. Furthermore, due to the shape of the hexagonal portion 1b and the biasing force of the spring 4, the connecting conductor 1 can withstand vibrations caused by transporting the equipment.
There is no need to worry about it falling off.

As shown in FIG. 9, when this embodiment is applied to oil-immersed equipment, the handle portion 1a of the rod-shaped connecting conductor l is constructed of wood or resin molding, and By protruding from the tip, the operator can change the tap without having to immerse his or her hands or tools in oil.

<Second Embodiment> FIGS. 2 and 3 are diagrams showing a second embodiment of the present invention, in which the connection conductor 11 of the tap 3 is made of an elastic thin plate, and the portion that comes into close contact with the plurality of taps 3 is A C-shaped cut and raised portion 11a is formed, and the installation procedure for the tap 13 is as shown in FIG.
By pushing it into the cut and raised part 1 as shown in (b)
1a is elastically opened in the direction of arrow E, and after insertion is tightened in the direction of arrow F as shown in FIG.

The tap changeover table 12 shown in FIGS. 2 and 3 has a long hole 12.
a, one end 11C of the tap 11 is twisted in a right angle direction and passes through the long hole 12a, and the tap 13 is connected to the long hole 1.
Although it moves in the longitudinal direction of 2a, it is configured so that it does not come off from the tap switching table 12. tap 11
The other end is a handle portion 11b made of wood or resin mold.

The tap 13 uses a bolt to connect the tap wire 5 via a connecting amplifier, and is tightened to the tap switching base 12 using a nut 15. To change the tap, move the connecting conductor 11 along the elongated hole 12a, stop at a position facing a predetermined tap 3, grasp the handle part 11b, and use the P part as a fulcrum to elastically move the connecting conductor 11 in the direction of arrow G. 10, and is crimped and secured to the tap 13 as shown in FIG. FIG. 11 shows a diagram in which this embodiment is applied to an oil-immersed transformer. In this embodiment, since the taps 13 can be arranged on a plane, the dimension in the height direction can be reduced, and since the connecting conductor 1 is integrated with the tap switching base 12, it can be immersed in oil when changing the taps. There is no risk of accidentally dropping the bolt,
The structure is simple, using commercially available parts such as nuts.

〔Effect of the invention〕

By implementing the present invention, it is possible to significantly reduce the effort required during tap switching work with a simple structure, and it is possible to avoid accidents caused by forgetting to tighten screws as in the conventional technology that uses screws for tap switching, thereby improving reliability. It is also effective in improving

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a first embodiment of a tap changer according to the present invention, FIG. 2 is a front view of the second embodiment, FIG. 3 is a side view of the same, and FIGS. 4 and 5 are conventional Front view and side view of the technology,
FIGS. 6 and 7 are a front view and a side view of another conventional technology,
8 and 10 are installation procedure diagrams of the first and second embodiments of the present invention, and FIGS. 9 and 11 are installation procedure diagrams of the embodiments for oil-filled electrical equipment. 1.11... Connection conductor, 1a... Handle part, 1b
... Tortoise shell part, lla ... Cut and raised part, llb ... Handle part, lie ... End part, 2.12 ... Tap switching stand, 12a ... Long hole, 3.13. ...Tap, 4...
Spring, 5...Tap wire, 7...Through hole, 14...
Connection amplifier, 15... Natsuto! --- Calibration conductor lα-High/Dole county tb- is sealed with Kobuno tfb-Ichishi district/6-Dut diagram-

Claims (3)

[Claims] 1. A tap switching device for stationary equipment such as a transformer, comprising an insulating tap switching base, a plurality of taps set on the tap switching base, and a connecting conductor commonly connected to the plurality of taps, One of the taps and the connecting conductor is provided with a means capable of sliding in the tap switching direction, and one of the plurality of taps and the connecting conductor is elastically supported and configured to come into crimp contact with the other. A tap switching device characterized by: 2. 2. The taps are each elastically supported, and the connecting conductor is configured to be connected to the taps in sequence by moving in a direction perpendicular to the arrangement of the taps. tap changer. 3. The tap switching device is characterized in that the tap is fixed to a tap switching stand, and the connecting conductor is configured to slide in the switching direction of the tap and elastically come into close contact with each of the plurality of taps.