The diagnostic testing of insulation systems provides data that can be used to quantify the condition of high-voltage electrical equipment such as load tap changers, circuit breakers, regulators and transformers. Using recnetly developed algorithms, condition codes for these types of equipment can be generated using laboratory and field data. These codes are used to determine when maintenance is necessary and to prioritize maintenance activities. This paper describes how these condition codes are applied as the basis for a condition-based maintenance system. Gase studies are included that illustrate the reliability and the fiscal impact of the protocols.
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