Public Works Department Tender

Design, manufacture and supply of outdoor type of three phase 415 volt LT unbalanced 63 KVA servo controlled automatic voltage stabilizer copper wound oil cooled type designed for input voltage 160 V to 450 V phase to phase and output voltage 415 V ± 1% phase to phase and 230 volt ± 1% phase to neutral and frequency 50 HZ +/- 3%. The no load current shall not be more than 5% of the rated output current. The stabilizer shall be totally powder coated from outside to have aesthetic outlook and inside of tank should be zinc chromate painted. Panel should be screen-printed. The unit shall be housed in sheet steel of 14 gauge thickness having wheels with sturdy construction to withstand the rigorous shifting movement, repair works and handling. The unit shall be supplied with first filling of fresh filtered transformer oil having dielectric strength and shall be suitable for unbalanced input voltage and unbalanced output load . PROTECTIONS - Under voltage , over voltage , short circuit, overload and surge protection through suitable capacity MCCB BYPASS ARRANGEMENT - Bypass arrangement shall be provided through suitable capacity bypass switch and complete with cement concrete platform of required size as per instruction of Engineer in-charge and RiTES/CEIL (Tested) Certificate in this respect to be submitted. The job includes CAMC for 2 Years after DLP of 1 Year.

Supply, installation, testing & commissioning of GI Electrode Earthing with 50mm dia and 3 meter length, with 3mm thick the electrode should be hot-dip galvinised. The GI Electrode shall be pre-filled with Cristaline Conductive Materila (CCM). The GI electrode shall be surrounded with BEE MOIST compound to provide maximum contact betwen the electrode and compound should be eco-friendly GI Electrode Earthing should be maintinance free and does not require regular manual addition of water . The earthing pit should be covered with PVC cover.

Providing and fixing 25 mm X 5 mm G.I. strip on surface or in recess for connections etc. as required.