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This document provides guidance on selecting Metrosil resistors to limit current transformer (CT) secondary voltages during faults for high impedance relays. It outlines a 5-step process for identifying the correct Metrosil type based on the relay setting voltage, maximum fault current, and other system parameters. Tables 1-4 list recommended Metrosil types for different relay voltages and fault currents on 1A and 5A CTs, along with each type

Author

yadav_sct

Language

EN