Iec61869-2 !full! -

: Recent extensions (like WB1 and WB2) address the growing need for accuracy in measuring harmonics up to 20 kHz , which is critical for modern grids with high harmonic distortion from power electronics. Essential Testing & Verification

IEC 61869-2 applies to current transformers intended for use with electrical measuring instruments and electrical protective devices at frequencies between 15 Hz and 100 Hz (typically 50 Hz or 60 Hz). iec61869-2

If you are specifying a new substation or retrofitting digital relays, you need to understand IEC 61869-2. Here is why. : Recent extensions (like WB1 and WB2) address

IEC 61869-2 is an international standard published by the International Electrotechnical Commission (IEC). It is part of the IEC 61869 series, which replaced the older IEC 60044 series (specifically IEC 60044-1). Here is why

: Specialized classes like PX-A must provide accurate transformation up to the maximum fault current without saturation under both steady-state and transient conditions.

: Which focused on protective CTs for transient performance.