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 the 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 moulded 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 the 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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