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An Analysis of Induction Motor Predictive Maintenance Techniques

Predictive maintenance for large electric motors has generally consisted of traditional tests used to determine the condition of the ground wall insulation of the stator and the integrity of the rotor bars. These tests are trended, and an attempt is made to estimate the remaining hfe of the motor by analyzing the past performance of motors under study. The trending program is not adequate since many of the recommended tests are not trendable outside of a controlled environment, and these tests do not predict the mechanisms which are most likely to cause failure.

Extract from the Proceedings of the 28th Southeastern Symposium on System Theory (SSST '96)

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Maintenance of Bearings for High Temperatures

                    When rolling element or sleeve bearings operate under extreme conditions, it’s more important than ever to follow proper lubrication selection and maintenance procedures to maximize effective life and efficient performance. Long-term analysis of field data shows that the lack of proper lubrication is the most commonly cited cause of bearing failure and accounts for over 40 percent of breakdowns.

Material downloaded from powertransmissions.com

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Article on Vibration

In its simplest form, vibration can be considered to be the oscillation or repetitive motion of an object around an equilibrium position. The equilibrium position is the position the object will attain when the force acting on it is zero. This type of vibration is called "whole body motion", meaning that all parts of the body are moving together in the same direction at any point in time.

Article downloaded from http://www.maintenanceworld.com

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Tips for Handling, Storing and Dispensing Lubricants

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