Tamil Nadu Tenders

Material and labour in repair for maintenance free chemical earthing comprising of one No chemical earthing having specification as follows complete all as specified and as directed:- (a) Copper electrode of wall thickness minimum 2mm not less than 3m length with not less than 50mm outer dia including copper strip of size 50 x 6mm minimum 2m long connected with 50mm dia copper electrode. (b) Fixing of copper earth electrode by drilling / boring 175mm dia hole 5m deep in any type of strata, placing electrode along with extention earth strip 50 x 6mm, 2 mts long and mixing earthing soil resitivity improvement compound Gel / powder (Terralon) min 10 KG per bore and 75 KG soil resistivity improvement compound (Electrodite) mixing homogeneously as per manufacturer instruction. (c) FRP earthing display board 254 x 380mm made out of plastic duly fixed with 610mm height made of plastic hollow pipe of 20mm dia information related to type of earthing, earthing result, due date of testing etc. (d) PCC earthing pit in PCC 1:2:4 type B-1 of internal size 300mm x 300mm x 300mm with 120mm thick wall and 700 x 700 x 150mm thick bed concrete and 50mm thick precast chamber cover of RCC 1:2:4 type B1 reinforced with welded steel wire fabric or XPM Jali (weight not less than 4.00 kg/Sqm), complete all as shown in electrical plate No -3 of SSR part - I complete. (e) Contractor must visit the site before quoting the tender to understand the difficulty and cost for carrying out the job in the station.

Summary

Part A: Supply Supplying of 1250 KVA 3Phase, 50HZ, self cooled (air natural) cast resin dry type indoor transformer double wound for voltage ratio of 11KV / 433V, between phases, at no load and arranged for Delta / Star connection as per vector group Dyn11 with the neutral brought out on star side with matching percentage impedance, voltage ratio and vector group etc.of the existing transformer, (details attached) with provision for connecting cable on HV side & bus duct on LV side with enclosure and all standard fittings etc.,as per attached specifications complete as required.

DIGITAL EX.PROOF FIELD CALL STN.

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