JPS60163414A - On-load tap changer for on-load tap changing transformer - 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 The present invention relates to an on-load tag changer as described in the generic part of the claims.
It is known in No.B.

The basic idea of the present invention resides in an on-load tap changer that uses an oil suction pipe kW to remove insulating oil from an oil tank for maintenance. It is also possible to flow through such an oil suction pipe through an oil filtration device a11- in order to purify the insulating oil during operation of the on-load tap changer. This oil suction pipe is made of an insulating tubular body with an open downward direction, and the oil reaches its bottom.

The object of the invention is to simplify the implementation of the oil suction pipe in the stated above-mentioned on-load tap changer.

The problem obtained is solved by the means specified in the characteristic parts of the claims.
It is to integrate two structural parts or one structural part. This function of the oil suction pipe also serves the function of the display shaft. This not only simplifies the structure, but also improves the amount of metal that can be used inside the oil tank. That is, instead of the shaft and the suction pipe, which are the two parts extending in the axial direction of the oil tank, only the entire nine shafts are required.

With regard to the voltage stresses acting between the tap changer head and the changeover part, advantages are also obtained because one of the two groove moving parts, ie the sliding part of the suction pipe and the display shaft, can be omitted.

The accompanying drawing shows a sectional view of an embodiment of a switching switch according to the invention, which switches in the usual manner with a load tap selector, not shown. The vessel resides in a cylindrical oil tank 1 with an oil tank bottom 2 and an upper flange 5km. A drive shaft 6 protrudes from a switching switch assembly 4 located in an oil tank 1 through a lid 5. This drive shaft 6 is connected to a drive shaft 8 which passes through the center of the switching switch assembly 4 and reaches a tap selector (not shown) by an insulating coupling 7.

The drive shaft 6 operates the switching switch assembly 4 as well as a tap selector (not shown), which will not be described in detail here. On the oil tank bottom 2 inside the oil 411 are a driving gear 9 and a maltese cross (tooth J) that constitute an interlocking mechanism.
1! ) 1o is up and the switching position indicator 11kffi on the tap changer head 3 is activated. The Maltese cloth 10 is positioned on a bearing 12 that shoulders the oil passage opening 13.

This Maltese cloth 10 has a center hole 21, and an insulator shaft 14, which is an insulator tube for the switching position indicator 11, is fitted into the center hole 21.

At the head flange 30 portion, the insulating shaft 14 is fitted into a connecting portion 15 of a (numerical) display plate 16, and is oil-tightly joined to the opening of the lid 5 to this connecting portion 15. On the outside of this opening is a flange 171r for connecting to the oil suction pipe.
The curved arm of the shoulder is connected to the 17th. An observation glass 18 is provided on the lid 5 for reading the display disk 16.

In order to completely prevent the insulating shaft (tube) 14 from coming out when the lid 5 is removed, two bins 19 are provided under the holding plate 20 and fixed to the head flange 3.

It will be obvious that in the S construction shown here, the insulator [14] is formed as the display drive shaft of the switching position indicator 11, and at the same time functions as an oil suction pipe.

[Brief explanation of the drawing]

The attached package is a sectional view showing the ☆ part r of the load tag changer. The main reference symbols in the diagram correspond to the following number 9: ◎1: Oil
Tank 2: Bottom part 5: Lid 12: Bearing 13; Oil passage opening 14: Insulator shaft (tube) 15: Connecting part 16: Display disk 17: Curved tube 21: Medium, L? Agent Esaki Hajime Esaki Good Agent Esaki Party History Page 1 Continued 0 Inventor Günther Froat Federal Republic of Germany, Raasse, 20 Saar, Ernstone Ettorst

Claims (1)

[Claims] A switching switch housed in an oil tank and a tap selector 1 located below the oil tank and driven at the same time as the switching switch.
An on-load tap changer for an on-load tag switching transformer with r:aw, the switching position of which is coupled to the drive part of the tag selector via an interlocking mechanism and enclosing a switching switch with an nπ indicating disk. At this time, an interlocking mechanism installed in the oil tank, nl located at the bottom of the oil tank, and t'L7 located along the inner wall of the oil tank (a part of the lid by an insulator shaft) is displayed on the lid. In an on-load tap-changer for an on-load tag-changing transformer connected to an indicating disc provided, the shaft made of an insulator is a tube (14), and the drive tube is in contact with the tube (14). The bearing (12) provided in the center hole (21) of the tooth It (10) and the oil flow opening (15)' of the oil tank bottom (2)
) and connected to the pipe (14)
The bearing of the disc (16) is formed as a middle bearing connection part (15), and is oil-tightly connected to the flanged hole of the lid (5) having a curved pipe (17) outside the middle 9 connection part. An on-load tag changer for an on-load tap-changing transformer characterized by: