Central Electricity Regulatory Commission(R-1)
Powergrid Corporation of India ltd. (PGCIL) (R-2)
Rajasthan Rajya Vidyut Prasaran Nigam Limited (R-3)
Ajmer Vidyut Vitran Nigam Limited (R-4)
Jaipur Vidyut Vitran Nigam Limited (R-5)
Jodhpur Vidyut Vitran Nigam Limited (R-6)
Himachal Pradesh State Electricity Board (R-7)
Punjab State Power Corporation Limited (Formerly Punjab State Electricity Board) (R-8)
Haryana Power Purchase Centre (R-9)
Power Development Department (R-10)
Uttar Pradesh Power Corporation Limited (R-11)
Delhi Transco Limited (R-12)
BSES Yamuna Power Ltd (R-13)
BSES Rajdhani Power Ltd. (R-14)
North Delhi Power Ltd (Now known as Tata Power Delhi Distribution Limited) (R-15)
Electricity Department (Chandigarh) (R-16)
Uttarakhand Power Corporation Ltd (R-17)
North Central Railway (R-18)
New Delhi Municipal Corporation (R-19)