Standards Development
Clause 1 of IEC 61869-1:2023 is replaced by the following:This part of IEC 61869 is applicable to newly manufactured inductive current transformers intended for applications where the nominal voltage is higher than 1 kV AC, for measuring, protection and control purposes, with rated frequencies from 15 Hz to 400 Hz.
NOTE A bushing type current transformer, although having no primary insulation level for itself is often placed on a system with a nominal voltage > 1 kV AC and therefore falls within the scope of this document. Example: CT placed around an HV bushing or a cable.
The general requirements for instrument transformers for applications in LV systems (nominal voltage ≤ 1 kV AC) are covered by the standard IEC 61869-201.
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