In the realm of electrical engineering, the accurate measurement of current is fundamental to the safe and efficient operation of power systems. Whether for metering energy consumption or protecting grid infrastructure from faults, Current Transformers (CTs) are the unsung heroes of the substation. The international standard that governs the accuracy, safety, and testing of these crucial devices is .
Designated as 5P, 10P, and PR (and others like PX). norma iec 61869-2
This duality ensures that a single substation can simultaneously perform accurate billing measurement and reliable fault detection using different CTs on the same power line. In the realm of electrical engineering, the accurate