A. Initial Inspection services – The Contractor shall perform the following: 1. Visually inspect the motor before disassembly for obvious damage and defects. The Contractor shall record the as-found condition of the motor on the inspection report. 2. Record Insulation resistance to ground of all windings. A polarization index shall be calculated and recorded for medium voltage motors. Voltage test levels shall be consistent with the operating voltage of the motor being tested. 3. Measure and record air gap at the 12, 3, 6 and 9 o’clock positions at both ends of the motor. 4. Dismantle and inspect the motor for defective components. The Contractor shall take care during the disassembly and ensure components are marked for identification and orientation for reinstallation. 5. Provide an inspection report with estimated cost of repair to the Project Officer for approval within three business days in order to proceed with repair. The estimate shall include the subject motor’s nameplate information such as make, model, serial number, frame size, RPM, voltage, insulation class, etc., as well as the Water Pollution Control Bureau (WPCB) Work Order number. B. Reconditioning Services – The Contractor shall perform the following: 1. Rotor (Inspection/Test/Reconditioning): a. Visually inspect of the rotor and shaft for physical damage or signs of abnormal operation. b. Complete a core loss test on the rotor. Results shall be recorded on the test report. c. Thoroughly clean and dry the rotor and shaft. d. Inspect the rotor laminations and verify they are firm and secure on the shaft. Dress any minor rubs or burrs. e. Inspect the rotor bars for signs of fatigue or cracking especially at the end ring connections. Non-Destructive Examination (NDE) methods may be requested if questionable indications are found. f. Inspect end rings for signs of overheating, arcing or burning. g. Inspect the shaft and coupling fits. Verify proper tolerances of the key/keyway...
