Compensation block for air-core reactors and transformers

1. 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;

the compensation block having a slot formed therein for connecting an upper spider arm of the air-core reactor and said compensation block together in a form-fit having a meshed connection;

said upper spider arm having a rectangular cutout formed therein, with said rectangular cutout having a width corresponding to a width of said compensation block and a height corresponding to a part of a height of said upper insulating material block of said compensation block, wherein said compensation block is arrangeable between a winding end and said upper spider arm of said air-core reactor, and wherein said slot is formed to receive the portion of said spider arm above said rectangular cutout.

2. 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 1 arranged between said winding end and said upper spider arm of the air-core reactor;

said upper spider arm of the air-core reactor and said compensation block being connected together in a form-fit having a meshed connection; and

said upper spider arm having a rectangular cutout formed therein, said rectangular cutout having a width that corresponds to the width of said compensation block and a height that corresponds to a part of the height of said upper insulating material block of said compensation block, and wherein said compensation block has a slot forming a counterpart for receiving said portion of said spider arm above said rectangular cutout.

3. The air-core reactor according to claim 2 , 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.

4. A method of mounting a compensation block in an air-core reactor, the method comprising:

providing the air-core reactor according to claim 2 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 to connect the upper spider arm of the air-core reactor and the compensation block together in a form-fit with a meshed connection between the upper spider arm and the compensation block; and

releasing the clamping device.