Attachment 2 - Refurbishing Motors.docx

-MICHIGAN

DEPARTMENT OF TRANSPORTATION

Attachment 2 Specification FOR REFURBISHING Stormwater Pump Station MOTORS

a. Description. This work consists of removing, testing, refurbishing, and reinstalling existing motors for vertical and submersible pumps for storm water pump stations listed on Schedule B: Pricing, along with detailed Pump Station Information on tab 2, including pump and motor make along with model and/or serial number information for motor repair items.

b. Materials. Provide all new materials that meet the current standards and practices of the NEC, ANSI, ASTM, UL, NEMA, the standard specifications, manufacturer specifications, MIOSHA and this specification.

c. Construction. Complete this work in accordance with the current standards and practices of the NEC, ANSI, the standard specifications, MIOSHA and this special provision. Ensure that all electrical work is done by a licensed electrician and in accordance with the NEC. Provide a copy of the license to the Engineer.

1. General. Electronically submit a complete list of testing and maintenance to be performed along with coordinated outages with the utility to ensure successful testing. Furnish testing and maintenance equipment, wiring leads, devices, lubricants and systems necessary for a complete test and refurbishment.

2. Quality Assurance. Ensure that testing is done by a testing firm regularly engaged in testing and maintenance of motors and electronically submit qualifications to the area Program Manager.

3. Field Quality Control. Provide the service of a factory trained, qualified representative to perform the testing and maintenance, make all adjustments necessary to place the system in reliable operation and instruct the operating personnel in the proper care and operation of the equipment.

d. Measurement and Payment. The completed work, as described, will be measured and paid for at the contract unit price using the following pay items:

Pay Items Pay Unit

A. Electrical Testing and Reporting Each

· Electrical testing and reporting is required for checks prior to motor removal, and after repairs are made. This item shall be paid once per pump instance.

· Ensure that a motor representative is on site during the testing and start up. Perform insulation resistance test after motor is installed and before motor power conductors are connected.

· Measure motor running current and evaluate relative to load conditions and nameplate full-load amperes.

· Electronically submit all testing reports to the area Program Manager.

B. Electrical Disconnect and Reconnect Each

· For instances where MDOT is not able to provide electricians on site for motor disconnect or reconnect, the Contractor shall have a licensed electrician to safely disconnect or reconnect the pump motor.

C. Crane Mobilization Each

· Provide rigger/crane equipment and licensed operators for removal and reinstallation.

· This item covers mobilization of equipment to the site for removal and for replacement of pumps or motors. Generally, a site will require two mobilizations unless repairs are able to be made on-site during the removal mobilization. For instances where multiple pumps or motors are pulled or replaced during mobilization only one instance will be charged (time spent removing or installing additional motors during a mobilization may be submitted)

D. Motor Diagnosis Each

· Provide motor testing in shop and ship motor to site with top bearings dry. Refill at site.

· Provide shop testing reports to the area Program Manager.

· Before implementing prescribed repairs, the contractor shall notify the area Program Manager in writing with suggested repair items and include an updated estimate for approval.

E. Rotor Repair Each

F. Stator Repair Each

· Rewind existing rotor or stator with Class H, inverter duty insulation. Wire leads to be operated as a typical Delta connected load (rather than existing part-wound configuration).

· Provide normally closed, snap-action, bi-metallic, temperature actuated switches installed in the end turns of the rotor or stator winding.

· Dip coils and bake.

· Paint rotor or stator with an appropriate finish for corrosion protection.

G. Bearing and Seal Replacement Each

· Provide new bearings, seals, required oil and grease, insulation plate and miscellaneous appurtenances.

· The work for this item includes replacement of all bearings and seals for the specified motor.

H. Top Plate Replace (Vertical Pump) Each

I. Miscellaneous Parts Dollar

· Miscellaneous Parts may include lift cables, lift chains, power cables, or other components not directly associated with the prescribed motor specifications.

· Supporting documentation will be provided to the area Program Manager in advance for all miscellaneous parts prescribed for the repair.

J. Miscellaneous Labor service Dollar

· Miscellaneous Labor hours will be allowed for instance where additional labor/service is approved, or is not part of the standard pay item (example: instances where multiple pumps are pulled or placed during a mobilization trip)

The above Pay items include all labor, equipment and materials necessary to complete the work as described (unless otherwise specified above).