JP3017390U - Load tap selector - Google Patents

Abstract

(57) [Summary] [Purpose] A load tap selector for a tap change transformer at load, which is simple and not complicated, and further provides a fixing to a shield ring which gives resistance to vibration. [Structure] It consists of a cylindrical oil container inside which fixed tap contacts are arranged, and a rotary shaft of a switching switch arranged inside that fixes a contact holder or a plurality of overlapping contact holders. Both sides of each contact holder , A shield ring extending concentrically around the rotation axis of the switching switch is fixed, and a plurality of spring clamps 5 are fixed in at least one horizontal plane around the rotation axis 2 of the switching switch. The shield ring 6 is fixed to the spring clamp 5 so that the clamp 5 fits the shield ring 6 at least partially in the shape of a clamp.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention consists of a cylindrical oil container in which a fixed tap contactor is arranged inside, and a rotary shaft of a switching switch arranged inside for fixing a contact holder or a plurality of overlapping contact holders. The load tap selector of the load tap switching transformer in which shield rings that extend concentrically around the rotation axis of the switching switch are fixed on both sides of.

[0002]

[Prior art]

 Such a load tap selector is known from the publication "Tamp switch under load type V" (print number VK02 / 81de-1081 / 2500) of Maschinenfabrik Reinhausen GmbH.

In these load tap selectors, switching is performed without interruption while a voltage is applied between the adjacent taps of the adjustment winding of the load tap switching transformer. In that case, this load tap selector simultaneously functions as a load tap changer that newly selects the tap of the winding to be connected each time, and one or more current limiting resistors are connected for a short time to supply current. It fulfills the role of a switching switch that switches from the first tap to a new tap without interruption.

Such a load tap selector is composed of an oil container substantially formed of an insulating cylinder and an insert body of the load tap changer inside the oil container. The fixed contact of the load tap selector is arranged on the inner wall of the oil container in a plane separated from each other, and is drawn out together with the connecting contact.

The insert of the load tap changer has a fully movable contact system, and has a rotating shaft of a switching switch installed at the center, a switching member of the load tap selector, and, in some cases, a preselector. It consists of a contact holder.

[0006] On both sides of each contactor system, there are shield rings that extend concentrically around the axis of rotation of the switchgear. These shield rings have a generally circular or oval cross section that opens towards the attached contactor system. This known shield ring is formed or fixed in the prior art with a fixed angle or fixed seam plate to which the shield ring is screwed around the rotary axis of the switchgear. This fixed angle complicates the fabrication of the shield ring. It is necessary to mount the fixed angles apart by, for example, spot welding with the rollers. If there is already a screw hole for fixing the shield ring on the rotary shaft of the switching device, this fixing should be performed with high accuracy. On the other hand, in actual operation, under the influence of the permanent high-frequency vibrations that come out of the transformer and are transmitted to the load tap selector fixed to this transformer, the fixing of the shield ring loosens and finally It has been confirmed to break.

[0007]

[Problems to be solved by the device]

 The task of this invention is to provide a remedy here, in a load tap selector of the kind mentioned at the beginning, which provides a simple, uncomplicated and still vibration-resistant fixation for the shield ring. Especially.

[0008]

[Means for Solving the Problems]

 According to the present invention, a load tap selector of the type mentioned at the beginning is provided with the above-mentioned problem, in which a plurality of spring clamps 5 are fixed in at least one horizontal plane around the rotary shaft 2 of the switchgear, respectively. This is solved by fixing the shield ring 6 to the spring clamp 5 so that the clamp 5 fits the shield ring 6 at least partially in the shape of a clamp.

[0009]

【Example】

 Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings based on preferred embodiments.

As shown in FIG. 1, the load tap selector, as is commonly used, is provided inside an oil container formed by an insulating cylinder 1 and a bottom portion (not shown) and a head portion. The rotary shaft 2 of the switching switch vertically penetrates the oil container. The rotary shaft 2 of this switching switch has one or a plurality of contact holders 3 which are overlapped and are horizontally fixed to the rotary shaft of the switching switch. The contact holder 3 holds a switching contact (also not shown). The rotary shaft 2 of the switching switch can be rotated by a driving means (not shown) as is well known.

Around the rotary shaft 2 of the switching device, a plurality of fixing flanges 4 are provided on both sides of each contact holder 3 in a horizontal plane. Spring clamps 5 are screwed to the fixing flanges 4, respectively. The cross section of this spring clamp 5 is approximately equal to the cross section of the shield ring 6 to be fixed, so that each spring clamp 5 at least partially fits around the shield ring 6 to be fixed to this spring clamp 5. The possible links of the shield ring 6 are made like spring contacts in the present case.

This fixing method has many advantages. That is, on the one hand, the spring clamp 5 and the shield ring 6 can be manufactured as separate structural parts, and further, there is little demand for accuracy with respect to both parts, and on the other hand, the elastic clamp conforming to the shape according to the present invention is provided by the independent spring clamp 5. Prevents the fatigue cracks described above due to vibration.

[0013]

[Effect of device]

 As described above, the load tap selector according to the present invention can provide the shield ring with fixing which is simple, not complicated, and further provides resistance to vibration.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a load tap selector according to the present invention.

2 shows an enlarged cross-sectional view of part "A" of FIG.

[Explanation of symbols]

 1 Insulation cylinder 2 Rotating shaft of switching switch 3 Contact holder 4 Fixed flange 5 Spring clamp 6 Shield ring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Rolf Schyutlempel, Federal Republic of Germany, 93057 Regensburg, Brandle Berger Strasse, 140

Claims (1)

[Scope of utility model registration request] 1. A contactless holder comprising a cylindrical oil container in which a fixed tap contactor is arranged, and a rotary shaft of a switching switch arranged inside for fixing a contact holder or a plurality of overlapping contact holders. In a load tap selector of a load tap switching transformer, in which shield rings concentrically extending around the rotation axis of the switching switch are fixed on both sides of, at least around the rotation axis (2) of the switching switch. A plurality of spring clamps (5) are secured in one horizontal plane, respectively, so that the spring clamps (5) at least partially clamp-shapedly fit the shield ring (6). A load tap selector in which a shield ring (6) is fixed to the load tap selector.