Office Time : Monday to Friday
08:00AM - 05:00PM
SCOPE OF WORK IN REWINDING JOBS INCLUDES
This Scope of Work covers Standard and flame proof motors – Exd, Exn, Exe, Exde. The General Scope of Work includes the following:
- Motors to be disassembled and inspected for internal damage caused by corrosion, wear and tear..
- Remove and replace DE and NDE bearings with new ones.
- Check for corrosion and derost it.
- Check the shaft slingers and repair where necessary to preclude future shaft and bearing leakage.
- Check drainage in the end plate to drain water that would otherwise collect around the shaft and bearings.
- Rewind Motor where necessary to required standards.
- Confirm integrity of terminal box sealing gaskets, replacing as required.
- Performs mechanical and electrical testing to confirm machines perform “as-new” and are not damaged by prior water ingress (including space heater, auxiliary device testing and 1hour unloaded run).
- Repair/replace any other electrical/mechanical faults found during repair/retrofit or testing (re-testing as required).
- Touch-up paint finish, or repaint to bring motor exterior surface back to “as-new” condition
- Furnish test certificates to confirm the final results
FINAL TEST PROCEDURE
Furthermore, the following additional checks shall be carried out:
STATOR
- Cleaning on the windings and the ventilation ducts
- Check on the winding slot wedges
- Check on the winding ends and the connections
- Visual check on the magnetic circuit
ROTOR
- Check on the insulation resistance
- Check on alignment (after reassembly of the rotor)
- Check on the Slip rings and Brushes
- Check on the winding ends and the connections
- Check on the fans/li>
BEARING
- Check on the clearance
- Check on the surface on the bearing sleeve and the journal on the rotor shaft
- Check on the bearing insulation
EXCITER
- Check on the insulation resistance
- Check on the line
- Check on the Diodes