JP3017922U - Load tap selector with current limiting resistance - Google Patents

Abstract

(57) [Abstract] [Purpose] Individual resistance units can be made into a box shape and adjusted to the required electrical resistance value, and these units can be easily installed / removed on / from the switching shaft. Provided is a load tap selector having a current limiting resistance that does not require disassembly of a switching opening / closing shaft. [Structure] A two-part conductive clamp ring 3 is arranged on the switching opening / closing shaft 1. The clamp ring 3 carries a contact system 2 and a fixing flange 3.3, ..., 3.7 is provided around the clamp ring 3. Have,
One or more resistor blocks 4.1, which form a current limiting resistance by being electrically connected in series to these fixed flanges.
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Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a load tap selector for a voltage regulation transformer having at least one current limiting resistance.

[0002]

[Prior art]

 In such a load tap selector, the load is switched without interruption by applying a voltage between the adjacent taps of the regulation winding of the voltage regulation transformer.

In that case, the load tap selector intermediately connects one or more current limiting resistors with a tap selector that selects each winding tap to be connected, and a current tap from the original tap to the new tap. At the same time, the function of the load changer that switches without interruption is satisfied.

Such load tap selectors are known, for example, from the publication "Stufenschalter Typ V" of the Maachienefabrik Reinhausen Co. Ltd. These load tap selectors are substantially closed at the top by the head of the load tap selector and at the bottom by the bottom of the oil container, an oil container formed of an insulating cylinder and the load inside it. It consists of an hour tap changer insert.

A fixed contact of the load tap selector is arranged in a surface of the inner wall of the oil container away from each other, and is drawn out by the connecting contact. The insert of the load tap changer includes all of the movable contact system and consists of a centrally supported switching opening / closing shaft, a switching opening / closing element of the load tap selector, and in some cases a preselector contact carrier. It is configured. The current limiting resistance is wound around a switching opening / closing shaft arranged in the center of the load tap selector in the concentric plane and fixed to this rotating shaft, and a special rib member is provided for each phase on the switching opening / closing shaft. The complete phase has moved and is fixed.

These current limiting resistances are wound according to the specific resistance value at that time calculated from the unique data of the transformer on the basis of the tap voltage and the operating current. Included with the load tap selector at. If the transformer data changes, then either the load tap selector for the other transformer should be used, or for some other reason the resistance value and the associated wound current limiting resistance will change, resulting in a changeover switch shaft. It is necessary to dismantle the whole. This is also necessary when maintenance or replacement of the current limiting resistance is required within the scope of inspection or the like.

[0007]

[Problems to be solved by the device]

 Therefore, the object of this invention is to make individual resistance units into a box shape and adjust them to the required electric resistance values, and further to provide these units to the switching opening / closing shaft and to easily install / remove them. In this case, in particular, it is to provide a load tap selector having at least one current limiting resistance in a structure that does not require disassembly of the switching opening / closing shaft.

[0008]

[Means for Solving the Problems]

According to the present invention, the above-mentioned problem is solved by the present invention. A cylindrical oil container in which a fixed tap contactor is arranged, a switching contactor 2.1 that can be rotated by a driving means, and is directly connected to the load withdrawing part L, and this switching contactor. are arranged on both sides of 2.1, respectively, via a current limiting resistor R _1, R ₂ carries a contact system 2 having an auxiliary contact 2.2, 2.3 to be connected to the load lead portions L, the oil vessel In a load tap selector having a current limiting resistance consisting of a switching opening / closing shaft 1 arranged inside, a switching clamp shaft 3 is provided with a conductive clamp ring 3 in two parts. Carries the contact system 2 and has fixed flanges 3.3, ..., 3.7 on the periphery thereof, which are electrically connected in series to these fixed flanges 3.3, ..., 3.7. One or more resistor blocks 4.1, ..., 4.5 forming a current limiting resistor are each fixed The resistor blocks 4.1, ..., 4.5 are stacked and fixed on each other, and are composed of resistor frames 5.1, ..., 5.5 electrically connected to each other. , Have been resolved by.

Other advantageous configurations according to the invention are mentioned in the dependent claims of the utility model registration claim.

[0010]

【Example】

 Hereinafter, the present invention will be described in more detail with reference to the drawings showing a preferred embodiment. The load tap selector according to the present invention has a switching opening / closing shaft 1 which vertically penetrates an oil container (not shown) formed of an insulating cylindrical body. This switching opening / closing shaft 1 carries a contact system 2 so that the fixed tap contact inside the oil container electrically connected to the winding lead wire of the tap switching transformer to be connected can be selected by the contact system 2. In addition, the switching opening / closing shaft 1 can be rotated by a driving means (not shown).

In that case, the contact system 2 is arranged on the roller carrier 2.4, with one switching contact 2.1 mainly formed by rollers and on both sides of this switching contact. It is composed of two auxiliary switching contacts 2.2 and 2.3.

FIG. 2 shows a principle circuit diagram of a load tap selector which has been selected as an example for explanation. The switching contact 2.1 is directly connected to the load withdrawal part L, and the auxiliary contacts 2.2 and 2.3 are connected with the load withdrawal part L by means of intermediately connected current limiting resistors R ₁ and R _2, respectively. .

According to the present invention, a two-part conductive clamp ring 3 is fixed to the switching opening / closing shaft 1 made of an insulating material by bolts 3.1, 3.2 and the like. This clamping ring 3 carries, on the one hand, a conductive roller carrier 2.4 and, on the other hand, a fixing flange 3.3, ..., 3.7 on the periphery. Resistor blocks 4.1, ..., 4.5 are screwed onto these fixed flanges 3.3, ..., 3.7, respectively. Each of the resistor blocks 4.1, ..., 4.5 is composed of five resistor frames 5.1, ..., 5.5. Each of these resistor frames 5.1, ..., 5.5 comprises here a carrier 6 on which a strip 7 of resistive material, in the form of a space-saving maze, is arranged, in particular. Is made. The individual resistor frames are superposed and fixed by hollow rivets 14 which are guided through the holes 6.1 in the carrier 6. Bolts can be guided through the hollow rivets 14, and resistor blocks 4.1, ..., 4.5 aligned by the bolts are screwed to the fixing flanges 3.3, ..., 3.7 of the clamp ring 3. it can.

Each of the carrier bodies 6 of each resistor frame 5.1, ..., 5.5 has lateral connection members 6.2, 6.3, which are connected by these connection members 6.2, 6. According to .3 the electrical connection between the individual resistance frames can be made eg by bolting.

In order to realize the configuration shown in FIG. 2, the connecting member 6.3 of the intermediate resistor frame of the intermediate resistor block 4.3 is connected to the intermediate connecting portion 13 of the clamp ring 3 by the connecting wire 12, and switching is performed. Electrically connect to contact 2.1. Further, the resistor blocks 4.1, ..., 4.5 are connected to each other via a connecting conductor 15. Both ends of the series circuit formed in this way are connected via connecting wires 8 and 9 to auxiliary switching contacts 2.2 and 2.3 which are arranged insulated from the roller carrier 2.4. There is. This can be conveniently done with the connection clamps 10, 11.

[0016]

[Effect of device]

 In the load tap selector according to the present invention, a current limiting resistor having all popular resistance values is prefabricated, held in advance, and when necessary, set to an electric resistance value required at that time, and thus aligned. It is particularly advantageous, since the resistance value can be incorporated in or removed from the switching opening / closing shaft at any time (even afterwards), and it may not be necessary to disassemble the switching opening / closing shaft.

The prefabricated resistance element itself has already been known for a long time for electric resistance devices. It is known, for example, from German Patent No. PS 902 270 and published patent application J374.

It is already known that the load tap changer “Type M” manufactured by the present applicant configures the current limiting resistance of the load changer as a uniform frame in the maze and uses it at the changeover switch. ing.

However, this is to solve the problem at issue here, as in the case where the cited type M load switch is a load tap selector, switching switching which selects the tap contact to be connected. Unless it has a shaft, it does not contribute and is reciprocally connected only between two fixed contacts, so that the current limiting resistance can be constantly fixed to the switching switch without any problem. In this case, the problems described in connection with the structure of the switching opening / closing shaft of the load tap selector required by the conventional technique do not occur.

[Brief description of drawings]

FIG. 1 shows a schematic sectional view of a load tap selector according to the present invention viewed from above.

FIG. 2 shows a circuit diagram of such a load tap selector.

FIG. 3 is a development view of a current limiting resistance arranged on a switching opening / closing shaft.
(a) Side view, (b) Top view.

[Explanation of symbols]

1 Switching open / close shaft 2 Contact system 2.1 Switching contact 2.2, 2.3 Auxiliary switching contact 2.4 Roller carrier 3 Clamp ring 3.1, 3.2 Bolt 3.3 to 3.7 Fixed flange 4.1 to 4.5 Resistor block 5.1 to 5.5 Resistor frame 6 Carrier 6.1 Hole 6.2, 6.3 Connection member 7 Strip plate 10, 11 Connection clamp 8, 9, 12, 15 connecting conductor 13 intermediate connecting part 14 hollow rivet L load drawing part R _1, R ₂ current limiting resistance

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

Claims (2)

[Scope of utility model registration request] 1. A cylindrical oil container in which a fixed tap contactor is arranged inside, a switching contactor (2.1) which can be rotated by a driving means and is directly connected to a load withdrawing portion (L), and this switching contactor. (2.1) arranged on both sides of the contact system having an auxiliary contact that connects to the respective current limiting resistors (R _1, R ₂₎ via the load drawer section (L) (2.2, 2.3) A load tap selector having a current limiting resistance, comprising a switching opening / closing shaft (1) that carries (2) and is arranged inside an oil container. A clamp ring (3) is arranged, this clamp ring (3) carries a contact system (2), and a fixing flange (3.3, ..., Around the periphery).
3.7) and these fixed flanges (3.3, ...,
3.7) One or more resistor blocks (4.1, ..., 4.5) electrically connected in series to form a current limiting resistor
Are fixed to each other, and the resistor blocks (4.1, ..., 4.5) are stacked and fixed to each other, and are electrically connected to each other, the resistor frame (5.1,
.., 5.5), characterized in that the load tap selector. 2. A resistor block (4.1, ..., 4.5) forming a current limiting resistor and electrically connected in series is spatially located at the center of the series circuit, and therefore has a resistance value of half. A connecting member (6.3) for connecting the connecting wire (1).
2) by means of the intermediate connection (13) of the clamp ring (3)
To the switching contacts (2.1) and to the auxiliary contacts (2.2, 2.3) where the beginning and the end of the series circuit are electrically insulated respectively. The load tap selector according to claim 1, wherein: