1. Bharat Heavy Electricals Limited (BHEL)
2. Voltamp Transformers Limited
3. TBEA Energy India Pvt. Ltd.
4. Crompton Greaves Power and Industrial Solutions Ltd.
5. Siemens Limited
6. Toshiba Transmission & Distribution Systems (India) Pvt. Ltd.
7. ABB India Limited
8. EMCO Limited
9. Schneider Electric India Pvt. Ltd.
10. Hitachi ABB Power Grids India