Public Health Engineering Department Tender

Providing, installation, testing & commissioning of fully automatic 50 Amps LT Control Panel along with installation, testing & commissioning of 4000 GPH x 170 mtrs. head submersible pump set with other allied electro-mechanical works at T/well Kamila No. 4. The complete job involves the following:

Fully Automatic LT Control Panel for submersible motor: Design, fabrication, providing, installation, testing & commissioning of fully automatic 50 Amps. LT Control Panel 415 volts, AC- 3 phase, 50 Hz + 5% suitable for operation of a submersible pump set. The panel shall be dust and vermin proof fabricated out of 14/16 SWG CR Sheet supported on M.S. angle job of suitable size with provision for fixing it on the ground with the help of foundation bolts. The panel should be sturdy enough for vibration free operation and should be equipped with suitable locking /sealing arrangements. The structure should be provided suitable entry and exit holes for incoming and outgoing cables. The panel should be given two coats of anti-rust primer and two coats of suitable / steel grey enamel paint. The panel should be equipped with following components / features: 1. Incoming feeder: The panel should be fitted with an MCCB 120 Amps. capacity of L&T/Schneider/Havells make only so as to break the power supply for rectification of the fault, 01 no. voltmeter, 01 no. voltage selector switch and a set of R-Y-B indicators at incoming side. 2. Outgoing feeder: The panel should be fitted with an Air break Star delta starter for operation of submersible motor. The starter panel shall comprise of 03 nos. air break power contactors of 50 Amps, 50 Amps & 50 Amps. capacity of L&T/Schneider/Havells make only, (02 nos. for main and delta supply, 01 no. air break contactor for star operation of the motor), 01 no. digital voltmeter, , 01 no. digital ammeter along with selector switches and a set of CTs and a set of R-Y-B indicators, 01 no. timer for change over supply of motor from star to delta, 02 nos. push buttons for start and stop operations of the motor and 1 no. MCB of suitable rating for protection of internal control wiring, a neat and clean internal control wiring should be made with flexible copper flexible PVC LT copper cable with proper thimbling at each end to complete the star delta circuit of outgoing supply. 3. Protection device / Fault analyzer: A protections device / fault analyzer shall be fitted with the panel with capability to identify and trip off the motor on power failure and on appearance of electrical faults as mentioned below which may otherwise damage the motor field coils and also the set of relays provided shall be able to restart the motor automatically on resumption of electrical power and also on rectification of the electric fault thus providing automation to the system and protection to the motor. The protection device /fault analyzer should provide protection against: (a) Low voltage below 350 volts (b) High voltage above 440 volts (c) Single phasing (d) Reverse phasing (e) Unbalanced phasing (f) Over loading A bimetal overload relay of suitable range should be fitted within the starter as an extra protection to protect the motor in case of failure of fault analyzer with an isolation/bye pass switch to bye pass the fault analyzer. The job includes shifting of the panel to site, providing & fitting of 16 sq.mm multi strand copper cable of Havells/Polycab/KEI make only of suitable length for making electrical connections between the main switch / panel board and the MCCB of the LT control panel and then making of electrical connections of the submersible motor to the LT control panel. The panel should be tested firstly on no load and then on full load with tripping of the starter in the panel on running of the submersible motor on all the tests as referred above to test the fault analyzer cum controller, MCCB, contactors and internal wiring of the panel, checking of any loose connections & their rectification thereof etc. The should also be tested for both its manual as well as fully automatic functions.

Installation of Submersible pump sets: Installation, testing & commissioning of 02 nos. (01 working + 01 standby) 4000 GPH x 170 mtrs head submersible pump sets (provided by Department) at T/well Kamila No. 4. The job includes shifting of submersible pump sets from Divisional store Vijaypur to workshop. Fabrication of graded reducer fabricated out of G.I. pipe of requisite length and dia as per pump outlet dia, threaded at one end to hold delivery end of pump and welded at other end with heavy duty MS flange for pump’s fitting with flanged column pipe., 02 nos. nuts of size 16 mm are to be welded on opposite side of reducer so that clamping bolts of a tie-rod can pass through it. Coupling of the pump and motor assemblies. Fabrication of a tie-rod clamping arrangement for clamping the pump & motor fabricated out of 40 x 6 mm MS flat with turn buckle arrangement made out of heavy duty 16 x 80 mm bolts welded at both the ends. The U-shaped clamp should pass though the bottom of the thrust pad of the motor and the bolts welded at its both ends should pass through the nuts welded on the opposite sides of the reducer for proper tying of the pumpset. Filling of the cooling jacket of motor with distilled water ensuring the system free of air bubble by making the water to circulate from inlet port through outlet port of motor followed by plugging of the same properly. Testing of the coupled pumpset by lowering the same in the test pit at workshop for checking the discharge of the pump and performance of the motor at zero head. Shifting of the pumpsets to site. Extraction of existing wornout submersible pump along with column assembly lowered at tubewell. Making of connenction of new submersible pump set with submersible cable with high grade patch roll & insulation tape at site and then lowering of the new submersible pumpset along with the column pipes one by one in the tube well after providing & fitting of nuts, bolts and rubber insertion sheets etc. The complete job includes cost of providing, fabrication/fitting charges of G.I. nipple with flange & MS U-clamp, nuts/bolts, patching roll, rubber gaskets, extraction & lowering charges, all labour, carriage charges and taxes etc. Complete job including testing of submersible pumpset after making all electrical connections of the submersible motor with the LT control panel at site.