Applies to newly manufactured instrument transformers for high-voltage (HV) applications with a nominal voltage > 1 kV AC or > 1.5 kV DC .
requirements, it must be used in conjunction with specific product standards: IEC 61869-1:2023
: Reclassifies several special tests as either type tests or routine tests. iec 618691 pdf best
The absolute best and most up-to-date source is the official International Electrotechnical Commission website. They offer clean, searchable PDFs, redline versions showing historical changes, and multi-user licensing.
| Part Number | Title | Best For | | :--- | :--- | :--- | | | General Requirements | Understanding common tests, ratings, and markings | | IEC 61869-2 | Current Transformers (CTs) | Protection CTs (5P, 10P) and Metering CTs (0.2, 0.5) | | IEC 61869-3 | Inductive Voltage Transformers | Traditional VTs for 50/60 Hz | | IEC 61869-4 | Combined Transformers | CT+VT in one unit | | IEC 61869-5 | Capacitor Voltage Transformers (CVTs) | HV and EHV coupling capacitors | | IEC 61869-6 | Low-power Stand-alone Instrument Transformers (LPIT) | Digital substations (Rogowski coils, dividers) | | IEC 61869-9 | Digital Interface for Instrument Transformers | Merging units and IEC 61850-9-2 LE | They offer clean, searchable PDFs, redline versions showing
The "best" feature of the standard is its role as the "Universal Foundation" for all modern instrument transformers .
Classification of environmental factors like humidity, seismic activity, and atmospheric pollution levels. 2. Electrical Ratings and Specifications follow this workflow:
Rated insulation levels, voltage, and current parameters.
Strict adherence to insulation, thermal, and mechanical requirements.
standard serves as the fundamental "product family" document that establishes general requirements for newly manufactured instrument transformers. By consolidating and updating previous standards like the IEC 60044 series, it ensures a unified approach to the design, testing, and performance of critical power system components. IEC Webstore 1. Scope and Technical Application
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