DC drive failures

Bannari Amman Sugars Ltd, Sathayamangalam

Repeat 2009 -2010  Tamil Nadu

4000tcd crushing capacity cane sugar plant with 20mw Turbo Generator Co-generation power plant. Supplied 4nos 790A tuned harmonic filters across three winding converter transformers 2nos, 2.5mva 11kv/433v.
First transformer connected a 750kw DC Motor through a doublet converter and Second one to 670kw and 450kw dc mill motors across its two secondary winding. 10% Energy savings verified. Eliminated DC drives electronic card failure and voltage sag tripping.