Green Technology
"Technology whose use is intended to mitigate or reverse the effects of human activity on the environment is called green technology"
Electric power utilities today are looking for more efficient distribution transformation accompanied by energy savings and environmental friendly systems. Adoption of well planned T&D systems can help to reduce line and equipment losses and defer the need for power generation thus impacting green house gas emissions. Our country is facing high AT&C losses of over 30% and out of T&D losses account for 26% resulting in the peak demand shortage of about 10%.

Government of India by enacting Energy Conservation Act 2001 has made its intentions clear to bring about the much needed reforms in the power sector and to implement energy conservation policies. Subsequently usage of amorphous metal core distribution transformers is being patronised based on the guidelines provided by the Bureau of Energy Efficiency (BEE) an agency of Ministry of Power, Government of India.

Amorphous metal distribution transformers using new generation ultra efficient low loss electrical steel, offer options not only to save the scarce energy and improve distribution system efficiency but also help to reduce green house gas emissions and contribute to make our environment cleaner for our next generation.

Further, these eco-friendly transformers have the following advantages:
  • Save significant amount of energy and reduce green house gases
  • Excellent option to reduce distribution losses and improve efficiency
  • Superior electrical performance under harmonic conditions. Potential to improve power quality and mitigate harmonics.
  • Lower temperature rise, slower deterioration of insulations result in longer life of the transformer.
  • Key to improve utility economics and enhancing energy conservation efforts.
The process:

The amorphous metal is available in a ribbon form of a pre fixed width and the ribbon thickness is < 25 Ám. These rolls are loaded on a special purpose PLC controlled automatic cutting machines imported from Germany and Far East to cut the ribbons into a predetermined lengths as per the design requirements. The automatic stackers stack these cut lengths to the desired stack thickness as per design. The stacked cut lengths are removed from the machine and are weighed to cross check with design parameters. After checking of the weight, the stack of the core is properly clamped with protective covers and these are moved to the forming tables on conveyors and then the stack is nested and the ends of protection cover are perfectly locked with TIG welding, thus forming a loop.

The loop is expanded to the required dimensions (to form a rectangular shape) and mandrels are inserted properly to maintain the dimensions. These formed loops are annealed under DC magnetic field for achieving and retaining the magnetic properties. All the annealed loops are cooled to room temperature and testing of individual loops is done with accurate digital power analyser and the results are compared with the design parameters. After the testing, the edge surfaces of the loops are properly cleaned and a coat of epoxy adhesive is applied to attain rigidity and the mechanical strength. After drying of the epoxy the final testing of the loops is done and the loops are packed in corrugated boxes with proper anti corrosive and moisture resistant material. The boxes are strapped to wooden pallets to avoid damage and such palletised boxes are dispatched.