Air-cooled dry-type transformer

Abstract

The invention discloses an air-cooled dry-type transformer which at least comprises an upper steel body, a lower steel body, three high and low voltage windings, three dehumidifying and cooling devices and exhaust fans. The upper steel body and the lower steel body are fixedly installed at the upper ends and the lower ends of the three high and low voltage windings respectively, the upper steel body and the lower steel body are each internally provided with a cavity, the dehumidifying and cooling devices are installed in the cavity of the lower steel body, air inlets of the dehumidifying and cooling devices are formed in the front face of the lower steel body, an exhaust outlet of each dehumidifying and cooling device is connected and communicated with an air inlet of the corresponding high and low voltage winding, and an exhaust outlet of each high and low voltage winding is connected and communicated with an air inlet of the corresponding exhaust fan arranged in the inner cavity of the upper steel body; according to the air-cooled dry-type transformer, air blast cooling is conducted on the interior of the transformer through the dehumidifying and cooling devices, dehumidifying and dedusting are conducted on air entering the transformer simultaneously, and it is guaranteed that the high and low voltage windings of the transformer cannot be subjected to short circuit caused by water vapor and dust.

Description

technical field [0001] The invention relates to a dry-type transformer, in particular to an air-cooled dry-type transformer, belonging to the technical field of dry-type transformer cooling. Background technique [0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, wharf CNC mechanical equipment and other places. Simply put, dry-type transformers refer to transformers whose iron core and windings are not immersed in insulating oil. Cooling methods are divided into natural air cooling (AN) and forced air cooling (AF). When naturally air-cooled, the transformer can operate continuously for a long time at the rated capacity. When forced air cooling, the output capacity of the transformer can be increased by 50%. It is suitable for intermittent overload operation, or emergency accident overload operation; due to the large increase in load loss and impedance voltage during overload, it is in a non-economic operation state, so it should...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing air-cooled dry-type transformers use a blower to supply air to the inside of the transformer, which has achieved a cooling effect. In addition, the existing air-cooled dry-type transformers only have the effect of supplying air for cooling, but cannot Dehumidify and remove dust from the air, if untreated air enters the inside of the transformer, it is very easy to cause damage to the inside of the transformer

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