Dry type transformer

Abstract

A dry type transformer belongs to electrical equipment and comprises a tank body, tank doors, an iron core and a coil. The cross section of the iron core is in an oval shape, the coil is in a foil wound type, the coil is in an oval shape matched with the iron core, cross reinforcing ribs are arranged on the inner side of the tank door, approach switches corresponding to the two tank doors are respectively arranged on a door frame at the top end of the tank body, the two approach switches are in parallel connection, and the two approach switches are both connected with an alarm. The iron core and the coil are changed into oval shapes form rectangular shapes, so that materials and cost are saved. The coil is changed into the foil wound shape from a wound type, so that the coil is strong in short circuit resistance, reliable in work and convenient to process. The tank doors are good in rigidity. When the tank doors are opened in an operation process of the transformer, the alarm can give out alarm. Thus, the safety is greatly improved.

Description

technical field [0001] The present invention relates to a kind of electric equipment, specifically a kind of dry-type transformer. Background technique [0002] In modern society, a transformer is a kind of electrical equipment that is closely related to human production and life. In electrical equipment and wireless circuits, transformers are often used for lifting voltage, matching impedance, safety isolation, etc. According to the cooling form, transformers can be divided into There are two types of dry-type transformers and oil-immersed transformers. [0003] Compared with oil-immersed transformers, dry-type transformers have no oil, that is, there are no serious problems such as fire, explosion, and pollution, so electrical codes and regulations do not require dry-type transformers to be placed in separate rooms. According to the "Prospects of Research Report on Type Transformers", dry-type transformers account for an average of 15% to 20% in large and medium-sized cit...

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Problems solved by technology

[0004] The main components of the transformer are the primary coil, the secondary coil and the iron core. At present, the iron core and the coil of the dry-type transformer are rectangular, and the coil adopts a wire-wound form, which consumes more materials and is more expensive, and the wire-wound form The short-circuit resistance of the coil is weak, and the processing is inconvenient

[0005] In addition, most of the current transformer box doors are made of very thin stainless steel sheets or iron sheets, which have low rigidity and are easy to deform. Moreover, if someone opens the box door during the operation of the transformer, there will be great safety hazards. The above-mentioned disadvantages are all It is the problem that dry-type transformers need to solve at present

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