SPL REPAIR / REPLACEMENT OF ALL CRANES AND HOISTS AGAINST BER UNDER GE (EAST) AGRA

Amount

Design, supply, installation, testing and commissioning of electrically operated, overhead travelling (EOT) cranes of capacity 2 Ton, conforming to IS : 3177 (latest revision) with span upto 16 mtrs (approx), height of lift 6 mtrs (approx), travel length 60.00 mtrs (approx), suitable for operation on 415 volts, 3 phase, 4 wires, 50 Hz supply, double girder box type, with necessary steel supporting structures with hoist speed 4 mtrs / min, cross travel speed 5 mtrs / min, long travel speed 5 mtrs / min with VVVF drive along with motor of suitable capacity with control panel, power and controlling cables, confirming to relevant IS, controlled by pendent push button station and radio remote control switch of operation with and including steel rope of suitable size dia, operation system hoist / cross travel / long travel / electrically operated with pendent DSL system of shrouded bus bar type complete all as specified and directed. (Location : 509 ABW GE Group)

(vii) Controls : The crane shall be controlled by pendent. the main electrical components shall be housed sheet steel enclosures suitable for indoor application conveniently located for easy maintenance. Standard protection devices for overload protection and short circuit protection shall be provided. (viii) All other incidental, Civil, Electrical and Mechanical works pertain to cranes. (ix) The crane will be put to use for 365 days continuous duty with CT, LT and Hoist movements. (x) Gear & Gear Boxes Details : Gear box should be fabricated type duly stress relieved. Pinions made of En 24 and gears of En 18 Gears in all the stages shall be helical in design and to be of machined, lapped and hardened straight and helical spur gearing shall normally be used for all motions. Worm and bevel gears shall not be used. First and high speed reductions shall be through helical gears. All first reduction pinions and also the other pinions if feasible shall be integral with the shafts. All gears shall be of hardened and tempered alloy or carbon steel with machine cut teeth. Gear tooth shall be cut in metric module system. Surface hardening of teeh is not allowed. The gears / pinions should be hardened to HRC 50-55 and ground. Please note that gears and pinions must have pressure angle of 20 degree only. (xi) Lubrication : Suitable lubrication system shall be provided for gear box, all rotating parts wherever applicable. Details of the same to be furnished. Please indicate the type of Lub. Oil & grease, quantity also.

(xii) Rope Drum : Shall be of fabricated type stress relieved or seamless pipe. The circumferential weld joints shall be tested by 100% X-Ray quality. The drum dia, length & number of groves shall be as per design calculation . (xiii) Wheel : Trade mean dia for cross travel & long travel shall be as per design calculation. (xiv) Type of coupling : Couplings should be flexible geared Barrel type No pin / bush / rubber type coupling to be used. (xv) Machining Operation : All mechanical mating surfaces and wheel seating areas are to be machined to the required finish and protected. (xvi) Hoist Wire Rope Details : Fiber core confirming to IS : 2266. Wire rope dia as per design calculation 2 Ton Crane, 6 x 36 constructions with a minimum breaking load of 7700 Kgs. (xvii) Protection : All panels, limit - switches and motors shall have IP 54 protection. (xviii) Motor Details : Squirrel cage induction crane duty motors with VVVF drive along with motor of suitable capacity having 960 RPM, Totally enclosed, fan cooled, (TEFC) insulation class-F & confirming to relevent latest IS : 325, and IS-123, S4 duty, 150 starts per hour and 40% CDF and contractor to provide other details like No of motors, capacity of motor, Frame size, make, type and No. of poles etc hoisting motor with design calculation.

(xix) Type & details of Brakes for all motions:- Conical rotor type of "Fail to safe" action type, Electromagnetic shoe / disc brakes type to be provided to hold the mechanism in position instantaneously as soon as the power supply is 'OFF' either accidentally or intentionally for all motions. Brake wheels for hoisting & cross travel, shall be of forged construction of dia as per design calculation considering min breaking torgues of 9 Kg-m for hoisting and 6 Kg-m for cross travel respectively. (xx) Electric Contactors : Shall be of make SIEMENS / L&T / BCH / GE contactors suitable for crane operations. Crane duty AC-4 ratings. (xxi) Contactors Rating : The rating of all contactors shall be at least 50% higher than the respective electric motor full load current at the specified duty cycle. (xxii) Wiring : All the panel wiring should be done by using standard multi core copper highly flexible, double insulated cables and of Butyl Rubber. (xxiii) Earthing for electrical items in Crane : Shall be carried out as per IS. (xxiv) Trailing Cables : Trailing cables (Extra flexible having copper conductors only) should be travelling on rollers moving on separate I-Beam parallel to Bridge Girder and both for LT & CT shall be supplied and Erected by supplier. (xxv) Illumination : 2 Nos of 90 watts LED lamps & fittings shall be provided under the Bridge and 1 No shall be provided under CT trolley. (Total lights 3 Nos)

Design, supplying, installing, testing and commissioning of hoist electrically operated wire rope hoist of capacity 1 Ton including control panel etc for Lift upto 16 Mtrs, Class & duty - Class-II / Medium, Hoisting Motor TEFC of 960 RPM, Hoisting speed 4.0 Mtr / min approx, including hoisting break and hoisting limit switch, Fiber core wire rope confirming to IS : 2266 of suitable size complete all as specified and directed. (Location : (23 PARA-07 & 17 PARA -05)

Design, supplying, installing, testing and commissioning of hoist electrically operated wire rope hoist of capacity 1 Ton including control panel etc for Lift upto 31 Mtrs, Class & duty - Class-II / Medium, Hoisting Motor TEFC of 960 RPM, Hoisting speed 4 Mtr/ min approx, including hoisting break and hoisting limit switch, Fiber core wire rope confirming to IS : 2266 of suitable size complete all as specified and directed. (Location : OFP-04)

Design, supplying, installing, testing and commissioning of hoist electrically operated wire rope hoist of capacity 0.5 Ton including control panel etc for Lift upto 31 Mtrs, Class & duty - Class-II / Medium, Hoisting Motor TEFC of 960 RPM, Hoisting speed 4 Mtr/ min approx, including hoisting break and hoisting limit switch, Fiber core wire rope confirming to IS : 2266 of suitable size complete all as specified and directed. (Location : OFP-06) Note for item No.2 to 4 :- (i) Hoist will be mounted on bottom cord of the truss / RCC roof and all necessary clamping arrangement for mounting of EOT hoist will be provided by the bidder and cost is deemed to be included in the quoted rate. (ii) The desin calculation (Civil & Mechanical and relevant drawings if any) has to be got approved from accepting officer before fabricating of the hoist. (iii) Hoist operation shall be with pendant control with pandent of die cast or hard unbreakable plastic having push buttom for up & down movement on ./ off switches and stay put emergency stop switch. Pendent shall be hanged with chrome plated steel chain covered with sleeves. (iv) Input power supply shall be 415 + 3% volts 50 Hz, AC at main control board fitted with bldg and further electric cable connection for hoists shall be provided with suitable size of electric cable. Cost shall be deemed to be including in quoted rates.

M&L for earthing complete with galvanized earth plate electrode of size 600 x 600 x6mm thick burried directly in ground vertically to a depth not less than 2.25 M below normal ground level ) with top edge of the plate not less than 1.50 M below normal ground level , connected to and including galvanized iron strip of size 25 x 4 mm as earth lead soldered and riveted to earth plate by means of nuts, bolts, check nuts & washers, of galvanized iron or steel with connected to test point and testing on completion including 40 mm GI light grade pipe for earth lead protection from earth point to earth plate, including provn adequate quantity of charcoal dust mixed with 35 % common salt to a packed thickness of not less than 15 cm in alternate layers of charcoal and salt on all sides of earth plate with 20mm bore medium grade GI Pipe for watering,GI check nut, funnel and wire mesh with and including all necessary excavation & earth work in soft/loose soil, returning filling in, removal of surplus soil to a distance 50 metre, PCC 1:3:6 type C-1 (20 mm graded stone aggregate) as in earth pit, 40 mm thick RCC cover using cement concrete 1:2:4 type B-1 (20 mm graded stone aggregate) reinforced with & including 8 mm dia mild steel TMT bar @ 100 mm c/c both way with suitable handle for lifting arrangement & including form work complete all as specified and shown in electrical plate No 3 of MES SSR Part I 2009 and as directed. NOTES:- (i) On testing, after completion of Job, if desired earth resistance is not obtained, the earthing shall be redone at without any extra cost by contractor.

Supply and fixing of earth continuity conductor or main earthing lead fixed to wall on batten of recess or chases or buried in ground or drawn in conduit / pipe not less than 40 mm or fixed to poles or any other indicated situation for loop earthing etc as required 25 x 4 mm size of galvanized iron strip complete all as specified and directed.

Supply and laying Tubes, 'light grade', galvanized iron 40 mm dia for crossing the GI strip to the wall or ceiling or laid in floors including cutting / chases / boring as well as making good to disturbed surface and matching with existing colour complete all as specified and directed. Make :- Tata / Jindal / Prakash.

Dinesh Engineering Enterprises

M/s SCHOLASTIC ENTERPRISES