COMPENSATION BLOCK FOR AIR-CORE REACTORS AND TRANSFORMERS

Abstract

A compensation block for air-core inductors or transformers is formed as a sandwich structure. The sandwich structure of the compensation block includes an upper insulating material block, a lower insulating material block, and an elastomer block arranged between the upper and lower insulating material blocks. The novel compensation block allows the formation of gaps due to settlement to be reduced.

Claims

1-4. (canceled)

5. A compensation block for an air-core reactor or a transformer, the compensation block comprising: a sandwich structure with an upper insulating material block, a lower insulating material block, and an elastomer block disposed between said upper and lower insulating material blocks.

6. An air-core reactor, comprising: a winding with a winding end and an upper spider arm of the air-core reactor; and a compensation block according to claim 5 arranged between said winding end and an upper spider arm of the air-core reactor.

7. The air-core reactor according to claim 6, wherein said upper spider arm of the air-core reactor and said compensation block are connected together in a form-fit having a meshed connection.

8. The air-core reactor according to claim 7, wherein said upper spider arm is one of a plurality of upper spider arms and said compensation block is one of a plurality of compensation blocks each form-fittingly connected with a respective one of said upper spider arms.

9. A method of mounting a compensation block in an air-core reactor, the method comprising: providing an air-core reactor with an upper spider arm and a winding; providing the compensation block having a sandwich structure with an upper insulating material block, a lower insulating material block, and an elastomer block disposed therebetween; compressing the compensation block by way of a clamping device; introducing the compensation block into an intended position between a winding end and the upper spider arm of the air-core reactor; and releasing the clamping device.

Description

[0015] The invention is explained in more detail with reference to the figures.

[0016] In the figures, by way of example:

[0017] FIG. 1 shows a current limiting reactor with concentrically arranged windings, which have been reinforced by means of glass-fiber-reinforced epoxy resin.

[0018] FIG. 2 shows a detail view of an upper winding end with a compensation block according to the invention.

[0019] FIG. 3 shows an arm of a spider with a compensation block according to the invention, and

[0020] FIG. 4 shows an arm of a spider with a compensation block according to the invention during the assembly process.

[0021] The current limiting reactor according to FIG. 1 has concentrically arranged windings reinforced by means of glass-fiber-reinforced epoxy resin, of which only the outer winding layer is visible.

[0022] At the upper and lower ends, the windings are fixed by spiders, the arms of which extend in a radial direction from the reactor axis beyond the radius of the outer winding.

[0023] According to the invention, a compensation block is now introduced between a winding end and an upper spider arm of the air-core reactor.

[0024] As is apparent from FIGS. 2, 3 and 4, this compensation block has a sandwich structure with an upper insulating material block, a lower insulating material block and an elastomer block located therebetween.

[0025] It is advantageous here for the upper spider arms of the air-core reactor and the compensation blocks to be connected together in a form-fitting manner by means of a meshed connection.

[0026] To this end, the spider arms have a rectangular cutout, the width of which corresponds to the width of the compensation blocks, and the height of which corresponds to a part of the height of the upper insulating material block of the compensation blocks.

[0027] As counterpart, the compensation blocks have a slot for receiving the portion of the spider arms above the rectangular cutout.

[0028] As a result of this form-fitting connection, the compensation blocks are fixed in position and slipping is prevented.

[0029] The compensation blocks are mounted as follows: [0030] the compensation block is compressed by means of a clamping device; [0031] it is introduced into the intended position between a winding end and an upper spider arm of the air-core reactor, and the clamping device is released.

[0032] The clamping device may consist for example of threaded pins which project through the sandwich structure of the compensation block and compress the compensation blocks by means of screwing.

[0033] Alternatively, clamping devices based on clamps, riveted connections or snap locks are also conceivable.

[0034] The preferred use of the compensation blocks according to the invention is for air-core reactors, but it is also possible for windings of transformers.

LIST OF REFERENCE SIGNS

[0035] 1 Outer winding layer

[0036] 2 Arm of the upper spider

[0037] 3 Compensation block

[0038] 4 Upper insulating material block

[0039] 5 Elastomer block

[0040] 6 Lower insulating material block

[0041] 7 Clamping device