S.26 NCTPS II ES circle EM I Dn Sub Division II Cleaning and tightness checking of 11KV 3 3KV 415V Switchgear buses and outgoing cables 11KV 33KV SPBD Bus ducts GCB Dry type transformers during the Annual overhauling of Unit I for the year 2026 S.26 NCTPS II ES circle EM I Dn Sub Division II Cleaning and tightness checking of 11KV 3 3KV 415V Switchgear buses and outgoing cables 11KV 33KV SPBD Bus ducts GCB Dry type transformers during the Annual overhauling of Unit I for the year 2026