25C - AGMT - WATER PUMP REHAB SRVS

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CITY OF SANTA AAA RFP N0;:16-090 WATER WELL; PUMP AND MOTOR REPAiR. SERVICES 1. Visually Inspect alis and windings for excessive wear, signs of conductor overheating or fatigue that possibly would Riot, be apparent during an Olectrixal test, 2, All stators shall be surge- tested with an electronic surge tester speelfically designed to apply a surge voltage stress test simultaneously between turns of a 0.011, between phases, from winding to drourid and to detect short-circiuited turns In winding under test, Testing shall be per EASAJEEE 63;2,11,2 and 7.2.9 standards, infrared imaging shall be provided, pre and post test, d, Mechanical Fit 1. Measure the bearing bores, shells, housings and shaft journals using a micrometer. Shaft fits and housing fits shall comply with ARIOO-2'015, Machine work shall be approved by the. Engineer before being performed or machine work may not be paid for,. Dearing journals, seal surtacss and bearing housing restoration shall be done by metalizing and machining or boring and cleaving. Documentation of before and after measurements shall be made. 2. Replace bearings per manufacturer's specifications. All grease fittings, plugs, eto, shall be replaced unless otherwise Indicated by the Engineer. Bearings shall be properly lubricated and bearing all reservoirs shall drained for shipping and Installation. The Contractor shall be responsible for filling the bearing oif reservoir upon installation. All equipment shall be tagged with information as to whether or not bearing all reservoirs were filled and what type of lubricant was used, e, Rotor Balancing 1, All rotors of motors rated at 50 HP/3600/1900 RPM and above shall be dynamically, balanced, with the rotorrunning at rated speed where practical, but not less than 690RPM in the balance stand, The balancing speed shall also ber rapid enough so the balance machine sensitivity can reliably measure the maximum allowable residual unbalance. 2. A printout tape from the balance/analyzer shall be furnished dotalling the final balance values„ Thls tape will be attached to the reccnditi'onlrepair/rewind documents when the motor IS delivered. f. rurdtar Leads Motor leads shall be permanently tagged with non-m.agnetlo markers, Motor lead configuration shall not be.altered. g, insulation L Winding%Shall be doublardipped with Class H varnish and baked, 2, Machtne-flnished surfacas bore of thestator lamination and periphery of. the rotor larn(riations shall be cleaned:of all varnish and foreign materials. Photo docurhantation of this process shall be made prior to and after iarnInation, K Final Test 1. A 1000 volt meg-ohm meter shaft be used to verify insulation continuity. This readl'ng shall be documented. After teastembly, motor .shall be test -run at rated voltage and frequency. Noload voltage and phase currents shall be recorded. Vibration mils displacement shall be measured and recorded in the horizontal, vertical and axial planes on both ends of the: motor, or top and bottom of vertical motors and documentation of current reading and vibration readings shall be provided to the Engin aor. 2, A 6KV meg-ohm meter shall be used to verify insulation continuity of all 4160V motors. I. Paint 1. Exterior of motor shall be properly cleaned of rust and foreign material, prime painted and finish painted with a good grade of machinery enamel, the same color as received unless otherwise specified, Nameplates„ machined sudf oas and internal parts shall be protected from paint. 25C-36