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CITY OF SANTA ANA RFP NO.: 21-059 WATER WELL, PUMP AND MOTOR REHABILITATION AND REPAIR SERVICES voltage and frequency. No load 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 Project Manager, 2. A 6KV meg-ohm meter shall be used to verify insulation continuity of all 4160V motors. ix. 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 surfaces and internal parts shall be protected from paint, 2. When needed, the interiors of motor frames and parts shall be painted with an insulating paint. This includes rotors, bearing brackets, frame interiors and air deflectors: Windings shall not be painted. x. Incidentals 1. In the event that the motor is in poor condition and cannot be repaired, reconditioned or made as new, the Contractor shall notify the Project Manager or Designee immediately. 2. All Incidental parts requiring replacement, such as bearings, coils, etc. shall be considered included in other items of bid and no additional compensation shall be allowed. 7. REWINDING OF ELECTRIC MOTORS When rewinding is done in conjunction with a recondition or repair, many of the items below will be redundant and shall not be performed or charged. The items below apply to stator only (including all labor, materials and testing necessary for work completion) and shall at a minimum include: a. Pre -Disassembly Test 1, Using a 1000 meg-ohm meter, conduct verification for insulation integrity. Acceptable criteria is 5 Meg -ohms or higher, 2. A 5KV meg-ohm meter shall be used to verify Insulation integrity of all 4160V motors. 3. Verify that heaters are operational and other attached features such as thermocouples have continuity. 4. Pre -disassembly documentation shall include the condition of mechanical fits (i.e. shaft run out), cracked, broken or missing parts, test run at full voltage, current readings, meg reading and surge comparison test as received. The Project Manager shall be notified if acceptable criteria are not met: b. Stripping 1. Windings shall be removed by temperature -controlled burnout with oven temperature suppression. Burn -out temperature shall not exceed 750 degrees Fahrenheit. 2. Windings shall be removed in such a fashion not to damage or distort the core iron. Upon removal of the old windings and insulation, the core shall be thoroughly cleaned and inspected for burrs, etc. 3. After the burnout procedure, the Contractor shall perform a stator core loss test to ensure the stator laminations are not heat damaged. If the stator core losses exceed four (4) watts per pound of core steel, notify the Project Manager prior to proceeding forward. c. Winding 1, General: Rewound motors shall meet or exceed all O.E.M. operating characteristics, unless otherwise specified by the Project Manager. NEMA Class H insulation shall be used, unless otherwise specified. Magnet wire shall be a Quad Build, insulated wire of domestic manufacture that meets or exceeds NEMA specification MW-35A. After winding and prior to resin treatment, windings will be surge -comparison tested and the results documented.