Understanding IEC 61869-1: The Standard for Instrument Transformers
The IEC 61869-1 is intended to be used as a "base" document. To fully specify a transformer, it must be read alongside a specific product standard IEC 61869-2: Additional requirements for Current Transformers IEC 61869-3: Additional requirements for Inductive Voltage Transformers IEC 61869-201: General requirements specifically for Low Voltage (LV) iec 618691 pdf
Frequency Range: Applicable for systems operating from 15 Hz to 400 Hz, as well as DC applications. iec 618691 pdf
Common reasons: