The demand of electricity in India has been increasing rapidly in the last few years. There is a mushroom growth in the high rise buildings, shopping areas, CNG and petrol stations, residential colonies, etc. Due to the scarcity of space in cities, installation of conventional oil type transformers in such congested and populated areas is always a big safety risk. The developed as well as many developing countries are installing dry type transformers as a solution for ensuring safety in such scenarios.
There are primarily two main manufacturing techniques for dry type transformers; Cast Resin and Vacuum Pressure Impregnated (VPI) with their own typical features. The main difference is their insulation class; Cast Resin is Class F (155°C) and VPI is Class H (180°C). The Vacuum Pressure Impregnated transformers not only offers in-build safety feature but there are many other advantages of using these transformers such as improved reliability, reduced losses, minimal maintenance, enhanced overloading capability etc.
Considering these advantages of dry type transformers, Pak Elektron Limited (RED PHASE) took the initiative and went into a Technology Transfer Agreement in March 2007 with DuPont India Limited (DPOL) for Designing and Manufacturing of Vacuum Pressure Impregnated dry transformers with Nomex® paper. RED PHASE is now pleased to announce that RED PHASE will be the first local company in the production of dry type transformers in India.
Enhanced Safety With the increasing costs of low voltage cables, it has become a trend to bring high voltage lines close to installed loads. For cost reasons, transformers are located near habitable areas such as buildings where fire risk has to be minimized. Additionally, industries such as chemical, mining, etc. are also a potential risk of fire. Ventilated Dry type transformers (VDT) have no fluids to spill, explode or burn, and the insulation used (NOMEX®) does not support combustion in air. Therefore, these transformers ensure enhanced safety of equipment against fire hazards.