Dry (VPI) Transformers

Iron core dry type transformer are suitable for indoor installations in explosive atmospheric areas and populated locations such as malls, multiplex etc. These 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 type 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 is up to 2000 KVA with primary Voltage up to 11 KV class & secondary Voltage between 433 to 6600 Volts.