A kind of anti-short-circuit transformer and its preparation process

Abstract

The invention particularly relates to an anti-short circuit transformer and a preparation technology thereof. The anti-short circuit transformer comprises an A-phase coil, a B-phase coil, a C-phase coil. Each of the A-phase coil, the B-phase coil and the C-phase coil comprises an iron core, a low-voltage coil and a high-voltage coil. Each low-voltage coil and each high-voltage coli are sleeved out of each iron core. An inner insulation paper board, a low-voltage coil lead, interlayer insulation and an end coil of each low-voltage coil form an integrated structure. A lead, the interlayer insulation and the end coil of each high-voltage coil form an integrated structure. Cushion blocks and clamp elements are arranged out of the end coils of the low-voltage coils and the high-voltage coils in sequence. The low-voltage coils, the high-voltage coils and the iron cores are braced through round rods. Clearances among the A-phase coil, the B-phase coil and the C-phase coil are braced through bracing boards. The A-phase coil and the C-phase coil at two ends are equipped with insulation boards. The insulation boards are connected with the lamp elements through thimbles. According to the transformer and the technology, under the condition that raw material costs are not increased, the distribution transformer has an anti-short circuit capability, a winding is effectively prevented from losing stability and deforming when the transformer is in a short circuit, and more profit margins are provided for a producer / manufacturer.

Description

(1) Technical field [0001] The invention relates to a transformer, in particular to an anti-short-circuit transformer and a preparation process thereof. (2) Background technology [0002] At this stage, as the State Grid Corporation has higher and higher requirements for the quality of power grid distribution transformers, it is necessary to meet the short-circuit resistance. The traditional structure is that the transformer winding is a circular structure, and the low-voltage winding has a formed glass fiber reinforced plastic cylinder inside, and also Only a 20mm thick pressure plate can pass the short circuit, and the cost is much higher than that of the conventional oblong distribution transformer (generally 15% higher), which greatly occupies the profit space. [0003] As we all know, a mechanical force acts between parallel wires carrying current. If the direction of the electric power in the wires is the same, the secondary force makes the two wires attract each other...

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Problems solved by technology

If no corresponding measures are taken, this force may cause winding instability and cause winding damage

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