Irrigation And Flood Control Department Tender

Modification by way of strengthening of Complete 650 HP stator be VPI procedure. Checking of all the coils from the stator, checking out all the laminations after proper cleaning of core/ slots making it free from oil / grease/ other deposition and replacement of damaged wedges/appropriate preparation of the stator for impregnation. The slot portions are to be wedged at the ends, centre and magnetic putty is to be inserted with adequate pressure to enhance flux linkage. Complete Insulation of all coils with the new “F” class insulation material of high quality such glass fibre or polyester and mica impregnated or glued together with epoxy, polyester amide (polyamide or polyimide), polyurethane or other resins having superior thermal stability, glass tape, fine cotton tape, wedges of mica textile etc. insertion of packing/anti vibration blocks, wedges and locking the same properly. The coil ends must be rigidly supported and adequately braced with binding rings or tapes to prevent their movement and also absorb shocks and vibrations during excessive over-loads, starting inrush currents, and voltage surges. Insulation of all the 54 No. of coils connections after brazing with eutectic brazing rods (14% of silver brazing rods) by applying in layers of glass mica tape reinforced by the varnished glass sleeves. Insulating the connections of the stator coil and also cleaning connections connecting the complete stator with CRC 226/ lectera. Varnishing the stator with class F Epoxy gel/ varnish coat of reputed make and drying out at optimum controlled temp. as permissible in standard practice. Continuing the drying out process till the required IR Value is achieved. Providing/ fitting in position of stator connection leads of actual length and specification. Complete job including the cost of material, labour charges.

Providing and fitting of new bearings at Non driving end a) 6248/C3 Ball bearing b) 6228/C3 Ball bearing c) New Designed thrust ball bearing 7228 at Driving end. Complete job including the cost of material after deduction of rebate on old material/scrap hire charges for tools and tackles required during the execution of job and labour charges.

Cleaning of the top bearing oil chamber with flushing oil & providing and re-filling of fresh lubricating oil of actual specification up to the mark. Complete job

Fabrication of the motor half coupling along with spacer and coupling bolts of mild steel material of proper grade and size as per sample available at LIS Ranjan.

Reassembling of 650 HP BHEL make solid shaft 6.6. KV, 485 KW HT Motor at site & shifting the assembled motor and placing on motor skirt. Coupling the motor with VT pump half coupling, restoration of all electrical connections of motor to LRS, motor panels and slip rings, making proper alignment of motor with pump and adjustment thereof. Testing the motor on load for all connected parameters and commissioning for proper operation. Complete job in all respects.