The Tamil Nadu government on Monday announced a hike in the power tariff for TANGEDCO consumers proposing an increase of Rs 27.50 (per month) for those using up to 200 units and 65 paise per unit rise for railways and educational institutions. There would be no change in the scheme of providing free electricity of up to 100 units, Electricity Minister V Senthil Balaji said and claimed the increase was inevitable to reduce the mounting debts of the state power utility.