1. As common questions of law are involved on similar set of facts, all these writ petitions are heard together and are being disposed of by this common order. For the purpose of disposal, I refer to the facts as arise in WP No.31962 of 2012.

2. The writ petition in WP No.31962 of 2012 is filed seeking directions by way of mandamus, to declare Letter No. SE/OP/RRRN/SAO/JAO-HT/D.No.365, dated 22.6.2012, issued by the Superintending Engineer of Central Power Distribution Company of A.P. Limited, as illegal, with consequential declaration that; (1) the petitioner is entitled to interest at the rate of 9.5% per annum, with effect from 13.2.2012, on the security deposit lying with the respondents and (b) that the respondents shall pay interest at twice the rate specified in clause 7(1) i.e., at the rate of 19% per annum with effect from 13.2.2012, till they actually pay the interest for the consumption years 2011-12 and 2012-13.

3. Petitioner is a Company having its industrial unit at Plot Nos.8, 11B, 12C and 12D of IDA Phase-III, Jeedimetla, Hyderabad and is engaged in the business of manufacturing iron and steel products. For the purpose of running the Unit, the petitione