En 61869-2 ((link)) < NEWEST — 2026 >

: Normally equal to I_pr, but can be lower for CTs in series with reactors.

These are used for billing and monitoring, requiring high precision at normal operating currents. en 61869-2

Report prepared for technical and compliance use. Always refer to the official standard text for full legal and design requirements. : Normally equal to I_pr, but can be