Replacement of damaged components of 400 HP Liquid Rotor Starters of unit no. 1 to 6 installed inside pump house at Lift Irrigation Station Raya.

Amount

Replacement of damaged components of 400 HP Liquid rotor starters of unit no. 1, 2, 3, 4, 5 and 6 installed inside pump house at Lift Irrigation Station Raya by way of disconnecting the 1100 V, 500 mm2 3-core rotor cables and 18 core control cable from LRS (Type MER-5) suitable for 400HP/300KW 3-phase slip ring motor and thereafter opening the drain plug to flush out the complete electrolyte followed by removal of damaged 1.1 KV, 50 mm square copper cables (50 cm length x 6 nos.) and thereafter dismantling and extracting out corroded and rusted electrode assembly from the LRS tank with suitable arrangement by cutting / opening the studs / nuts/bolts. Complete cleaning the internal surface of the tank with the help of wire brush and emery paper and other suitable arrangement to remove corrosion/rust/flakeinternal surface. Plugging leakages if found in LRS tank with superior quality water sealant suitable for high temperature and chemical resistance. Complete coating of internal surface of LRS tank with Zinc enriched spray coating which is suitable for corrosion protection and high temperature resistant upto 2000C. Dismantling all the parts of internal assembly by opening / cutting all the studs / nuts / bolts and then cleaning all the parts with the help of wire brush, emery paper and other suitable arrangement to remove rust/flake/corroded surface. Assembling all the parts by providing and fitting of new studs / nuts / bolt with washers and epoxy insulators as per sample in place of old / corroded / damaged one. Job also involves p/f of 3 nos. L- Shape aluminium flat strips (5 mm x 40 mm) as per sample with suitable hole to connect 50 mm2 cables with nuts & bolts as per sample. Complete coating of internal assembly of LRS with Zinc enriched spray coating which is suitable for corrosion protection and high temperature resistant upto 2000C.Insert internal assembly in the LRS tank and fitting it by providing and fitting of new studs / nuts /bolts and washers as per sample.The job includes providing and fitting of 50mm2 single core copper cable (50 cm length x 6 nos.= 3 MTR) and thimbles (12 nos.) for connecting electrodes with rotor cables in lieu of old burnt / damaged ones along with p/f ofepoxy bushings and seal on the electrodes (as per sample in lieu of worn out ones) to unit no. 1, 2, 3 ,4, 5 & 6.The job includes dismantling of resistance in–out assembly for repairing and p/f of new male–female parts/movable-immovable electrodes along with p/f of new springs ( as per sample)in female / immovable electrode assembly together springs (as per sample) on the reciprocating arm in place of worn out one to unit no. 1, 5 & 6. Providing and fitting of push button assembly for raising and lowering electrodes, indicators 03 nos. of suitable capacity, auxiliary contactor (1 No.) for contact multiplication, HRC fuses with assembly of 32 Amp (07 nos.),V-belt-A23, relay (1 No) in lieu of old damaged ones, with servicing of terminal block 22 ways for external connection and terminal block 10 ways for internal connection. Providing and fitting of push button assembly for raising and lowering electrodes, HRC fuses and indicators of suitable rating, V-belt-A23, relays in lieu of old damaged ones. Job also includes servicing of pilot motor, worm gear and sector wheel and gear box by providing and filling of gear oil and superior quality grease to unit no. 1 to 6.The job involves cleaning the complete outer surface of all the LRS to remove unnecessary material deposited on it with the help of wire brush and emery paper to prepare surface for painting then all the LRS with the help of spray gun.Thereafter re-filling of the electrolyte (Sodium carbonate + water) in the required ratio.Making all the connections of LRS and then testing LRS one by one first on no load and then on full load. Complete job includes cost of material, labour charges, painting charges,to and fro charges,hire charges for all tools and tackles required for execution of the job etc. complete job

PERFECT ELECTRICAL WORKS

M/S FASTTRACK ENGINEERS