IEEE C57.13.5-2009 - IEEE Standard of Performance and Test Requirements for Instrument Transformers of a Nominal System Voltage of 115 kV and Above
Standard Details
Single-phase instrument transformers of a nominal system voltage of 115 kV and above with capacitive insulation system for line-to-ground connection and for both indoor and outdoor application are discussed in this standard. This standard is intended for use as a supplement to IEEE Std C57.13™-2008 and as a basis for performance and safety of equipment. It also describes test sequences, criteria, methods and documentation for the test.
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