Motor maintenance testing & diagnostics on-line, off-line

Abstract

In recent years there have been significant advances in diagnostic technologies to detect early signs of degradation in motor electrical components. Such information allows corrective actions to be taken before failures occur and thus significantly improve motor reliability. This is particularly true in the case of on-line diagnostic techniques. This paper discusses the following on and off-line diagnostic test techniques, as well as visual inspections, as they apply to ac motors with voltage ratings of 2300 V and above.