Insulated drying processing method of transformer body

Abstract

The invention discloses an insulated drying processing method of a transformer body, which comprises the following steps of: (1) winding a low-voltage coil foil; (2) winding high-voltage and low-voltage coils; (3) putting into a coil shaping press after the high-voltage and the low-voltage coils with mould cores are loaded in a pressing mould; (4) taking out after the end of drying, tin-plating alow-voltage phase line copper bar and a low-voltage zero line copper bar, connecting the low-voltage phase line copper bar with a phase line bolt and connecting the low-voltage zero line copper bar with a zero line bolt; (5) assembling the transformer body and a lead; (6) sending the transformer body into a hot air circulating oven for drying; and (7) finally detecting. The insulated drying processing method has the beneficial effect that the moisture and the gas in insulating materials are effectively removed, so that the moisture content of the insulating materials is controlled within the limit required by the product quality to ensure short drying time, small equipment investment and low energy consumption under the situation that the transformer has enough insulating strength and running life.

Description

Technical field: [0001] The invention relates to the technical field of transformers, in particular to a transformer body insulation and drying treatment method for oil-immersed transformers. Background technique [0002] The purpose of transformer drying is to remove the moisture in the transformer insulation material, increase its insulation resistance, and increase its flashover voltage. Transformers with a voltage above 3kV must be dried. [0003] The transformer body is mainly composed of iron core, coil and insulating material. After assembly, before adding transformer oil, it must go through a drying process to remove moisture and gas in the insulating material, so that the water content can be controlled within the product quality requirements. within the limits to ensure that the transformer has sufficient insulation strength and operating life. For high-voltage transformers, the moisture content of the insulating materials is required to be within 0.5%. [0004]...

AI Technical Summary

Problems solved by technology

[0005] 1. Since the vacuum drying method requires repeated vacuuming and repeated heating, and the higher the voltage level, the larger the capacity, and the more repetitions, the drying time is too long, generally about 16 hours, which is not conducive to streamlined production and The production arrangement of the manufacturer

[0006] 2. At the same time, the vacuum pressure drying equipment has a large investment, inconvenient maintenance, serious power consumption and water consumption, and the cost is too high