Nuclear Corporation
National Thermal Power Corporation (NTPC)
National Hydro Power Corporation (NHPC)
Indian Railways
Power Grid Corporation of India Limited (PGCIL)
Reliance
Indian Oil Corporation
 

International customers

Hitachi, Japan
Fuji Japan
SESB, Malaysia
Pattani, Bhumibol, Thailand
Devighat, Kulekhani HEP, Nepal
CHPC, Bhutan
GECOL, Tripoli, Libya
Ohau, Rangipo HEP, Newzeland
AEJSC, Azerbaijan