Paint-dipping drying technique for dry-type three-phase combined transformer

Abstract

The name of the invention is paint dipping and drying technology of a three-phase combined transformer. The invention relates to the dry-typed three-phase combined transformer, in particular to the paint dipping and drying technology of the three-phase combined transformer. The technology can solve the problems of small overload capacity, easy explosion, heavy weight and inconvenient installation of the known epoxy resin cast dry-typed combined transformer. The technology is the paint dipping and drying technology of a voltage transformer coil and is completed by three times; in the first time, the coil is well winded for paint dipping; in the second time, a secondary coil is well placed for paint dipping after wrapping a foot loop; in the third time, the paint dipping is carried out after well winding an outer insulation; the three times of the paint dipping and drying technology process and the paint dipping and drying technology process of a current transformer coil are as follows: (1) pre-drying of a white body; (2) vacuum dewetting; (3) paint dipping; (4) returning of paint; (5) returning of residual paint; (6) cleaning; (7) returning of a cleaning agent; (8) drying. The paint dipping and drying technology has higher dynamic and thermal stability, fire retardance, environmental protection, safety, low loss, good thermal radiation, great overload capacity, light weight, convenient transportation and installation and free maintenance.

Description

technical field [0001] The invention relates to a dry-type three-phase combined transformer, in particular to a paint-dipping and drying process for a dry-type three-phase combined transformer. Background technique [0002] At present, the combined transformers widely used in China are JLS series oil-immersed combined transformers or JLSZ series epoxy resin cast dry-type combined transformers. Oil-immersed combined transformers have serious insulation oil leakage, require frequent maintenance, and have no protection against theft. Electrical function; JLSZ series dry-type combined transformers adopt epoxy resin casting and drying process, so the overload capacity is small, explosive, bulky, and inconvenient to install. Contents of the invention [0003] The purpose of the present invention is to address the above shortcomings, and to provide a transformer with high dynamic and thermal stability, flame retardant, environmental protection, safety, low loss, good heat dissipa...

AI Technical Summary

Problems solved by technology

[0002] At present, the combined transformers widely used in China are JLS series oil-immersed combined transformers or JLSZ series epoxy resin cast dry-type combined transformers. Oil-immersed combined transformers have serious insulation oil leakage, require frequent maintenance, and have no protection against theft. Electrical function; JLSZ series dry-type combined transformer adopts epoxy resin casting and drying process, so the overload capacity is small, explosive, heavy, and inconvenient to install