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This paper discusses motor on-line diagnostics and problems connected with this issue. The research proves that the most effective approach is diagnostic methods synergy. Implementation, detection and location of discharge-, vibration- and thermal-type defects are described. Several practical examples of in-field motor diagnostics have been used to illustrate the control data and repair recommendations.
Power transformers' on-line vibration control has its limits in relation to noises influence coming from mechanical components of transformer (pumps, motors); implementation of harmonics analysis helps to increase the control reliability. Implementation of capacitive currents' to ground harmonics analysis allows increasing the reliability of vibration defects location. This becomes possible due to...
This paper discusses power transformer diagnostics including PD (partial discharge) location and measurements, vibration events analysis and location, infrared control, gas-in-oil analysis. Diagnostic results are reviewed in this paper for a group of transformers taking a methods synergy as the basis; the following becomes revealed: - correlation of vibration events and discharges (sparking) in insulation...
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