<h1>Standard Input-Output Norms for transformer manufacturing specify required input components and verification obligations for imported materials.</h1> Prescribes Standard Input-Output Norms for manufacture of Single Phase Transformers above 100000 KVA, listing per KVA quantities for CRGO steel laminations, copper winding materials, transformer oil/base stock, phenolic resin bonded paper, pre compressed press board, press board moulding and motorised tapchangers, and requiring applicants to ensure imported goods correspond to inputs used or required in the production of the specified transformer.