2500 kVA to 100,000 kVA, up to 220 kV Class, Kirloskar Transformers are designed and tested to the following standards:Distribution and power transformers: IS: 2026, BS: 171 & IEC: 76, Converter transformers: IS: 4540, IEC: 146 & IEEE: 444, System earthing transformers: IS: 3150 & BS: