I want to know about dry type transformer construction working nd which material is used to made dry

seminar report of dry type transformer

ABB offers a full range of dry-type transformers with primary voltages through 72.5 kV built according to all major standards including IEC and ANSI. To minimize environmental contamination and fire hazard, customers are specifying dry-type transformers more frequently. These transformers meet strict parameters with respect to electrical system demands and functioning in areas with extreme climatic conditions. ABB's dry and cast transformers are virtually maintenance free and are manufactured in accordance with industry and international standards including ISO 9001.

Dry type Transformers are suitable for indoor installations in explosive atmospheric areas and populated locations such as malls, multiplex etc. These dry type transformers have F or H insulation class with or without enclosure as per the site requirement.

Dupont Nomex insulating material is used to secure the windings in place during vacuum and pressure impregnation process with superior class of resin to suit highly humid / dusty atmosphere & free from fire hazard. The result is a coil that exhibits high short circuit protection due to the tightly bond conductors comparable to completely resin encased molded transformers at a substantially reduced cost.

Dry transformers are very compact in sizes and hence suitable for basement installations in high rise buildings etc. Dry transformers are available with low losses giving savings over long service periods. Periodical vacuum cleaning of winding surface is the only maintenance. The capacity range of these iron core transformer is up to 2000 KVA with primary Voltage up to 11 KV class & secondary Voltage between 433 to 6600 Volts.


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