scope:

This standard defines the performance requirements of the interface between voltage or current measurement systems with low-energy analog outputs and compliant inputs of protective relays or other substation measuring equipment. These measurement systems reproduce the power system waveforms as corresponding scaled analog waveforms.

Purpose

This standard defines the electrical performance requirements of an analog interface intended for use between voltage and current transducers used to produce power system measurements and protective relays or metering instruments that make use of those measurements for protection and control applications. Transducers may be of any type, such as magnetically or capacitively coupled, resistive or capacitive dividers, or optical transducers, and may use electronics to provide an output analog signal as defined by this standard that is a scaled representation of the measured instantaneous voltage or current.