FIRST 420 KV TRANSFORMER IN INDIA IN 1978

4 X 150 MVA 420/220kV single phase Auto transformers to Panipat SubStation,BCB

4 X 83.3 MVA 420/220 kV Single phase Tie Transformers to Slapper, BCB

10 X 60 MVA 420/11 kV Generator transformers to Slapper, BCB

600 MVA (3 X Single Phase Bank) for India's first 500 MW, 220KV  Thermal Power Station at Trombay for TATA

630 MVA Transformers(3 x Single phase Bank) Indian first 400KV, 500 MW, nuclear power station at Tarapor 

India's First 420 kV SF6 breaker in 1979 to MHSEB/MPEB


MHSEB: Maharashtra State Electricity Board BCB: Beas Construction Board 
MPEB: Madhya Pradesh Electricity Board