Review the IEC 61869 Standards Overview on Scribd for a comparison between the old 60044 and new 61869 series.
It specifies the environmental limits for operation (e.g., temperature range: -5°C to +40°C for indoor, -25°C to +40°C for outdoor, with extensions available). It also covers altitude, humidity, and seismic conditions. Iec 61869-1 Pdf
IEC 61869-1 standard serves as the foundational "General Requirements" document for the entire 61869 series, which covers instrument transformers like current (CT) and voltage (VT) transformers. Standards Council of Canada While the official IEC 61869-1 PDF must be purchased through authorized distributors like the IEC Webstore Standards Council of Canada Review the IEC 61869 Standards Overview on Scribd