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This part of 61643 applies to surge isolation transformers (SITs) dedicated to surge mitigation and for connection to 50/60 Hz power circuits and equipment rated up to 1 000V rms. Surge and mitigation performance and standard methods for testing and rating were established
This document covers surge-related parameters but does not address typical transformer tests and parameters covered by the IEC 60076 series, IEC 60989 series, and IEC 61558 series standards. This document also does not cover SIT operation under differentia l mode lightning surge conditions
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