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1963
- Year of Incorporation
- Technical & financial Collaboration with M/s Hitachi Ltd, Japan
1966
- Supplied & installed First Power Transformer (4 MVA, 66/11 kV) to KSEB
1972
- Entered into International Business at first and exported 2 Nos. 50MVA Power Transformer to Tanzania
1978
- Installed first 400 kV Class Power Transformers & CTs
- 4 X 83.3 MVA 420/220 kV Single phase Tie Transformers to Slapper, BCB (BBMB). 10x60 MVA ,420/11 kV Generator transformers to Slapper, BCB (BBMB)
- 4 X 150 MVA 420/220kV single phase Auto transformers to Panipat Substation, BCB (BBMB)
1982
- Installed 600 MVA (3 X Single Phase Bank) for India's first 500 MW, 220kV Thermal Power Station at Trombay for TATA
1998
- Sub Divided 190MVA 3 Phase Transformer for APSEB for their Sreesailam project
2003
- Installed Largest Capacity Generator Transformer in India
- 630MVA Transformers (3 x Single phase Bank) India’s first 400kV,500MW Nuclear Power Station at Tarapur in 2003
2009
- Became a Joint Venture of Govt. of Kerala & NTPC Limited
2010
- TELK has become the first Power equipment manufacturer in who have conducted short circuit Test on 315MVA, 400/220/33kV Transformer having 1425 kVp Basic Insulation Level, at KEMA Netherlands with first attempt.
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