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P421.3 - Standard for High-Potential Test Requirements for Excitation Systems for Synchronous Machines

The purpose of this standard is to provide requirements and specific directions for the high-potential testing of complete excitation systems and their components using the most recent information manufacturers have made available.This standard applies to high-potential testing of complete excitation systems and their components for synchronous machines. Also included are auxiliary devices that are exposed to excitation system stresses. Examples of such auxiliary devices are temperature indicators, transducers, meters, etc. This standard does not cover the synchronous-machine field winding or field circuit breaker and discharge resistor.
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