Home Health Case Studies in Maintenance and Reliability: A Wealth of Best Practices
Scrutiny of the data showed three prime causes of electrical failures:
• Breakage of connections (due often to inadequate bracing)
There did seem to be some deterioration of motors with age. This was most apparent in large motors with a high starting frequency. We found that the larger the machine, the higher it was stressed. Manufacturers had algorithms which could predict the end of useful life with reasonable accuracy. For this they needed service and operational data, such as frequency of starts. This might be worth doing for older machines in critical services.
Scrutiny of the data showed four main causes of (premature) bearing failure:
Figure 39.1 Seven Locations Compared
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