Kyte B.,Xstrata Mount Isa Mines |
Scollay R.,MachineMonitor Pty. Ltd.
Hoist and Haul 2010 - Proceedings of the International Conference on Hoisting and Haulage | Year: 2010
This mine hoist is an important business asset that required a preservation strategy. The business risk was identified as high, with thermal aging of the armature circuit identified as the mechanism driving risk. Options to recover the machine and maintain production included replacement with an AC motor or another DC motor. Reasons for the eventual choice are discussed. Large DC motors have been replaced by AC machines. Manufacturing and testing expertise for large DC machines is fast being lost. The solutions, manufacture and testing arc discussed. This example of life management is applicable to strategic aging DC machine assets. This paper explains that retaining a DC motor was the lowest business risk and most economical way forward.