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Protection Relays Guide - kianday.com
59 Phase overvoltage 47 Negative sequence overvoltage _ U2 27D Positive sequence undervoltage _ U1 59N Residual overvoltage / Neutral displacement _ Uo 27TN // 59TN 100% stator earth fault ( 3 harm. )_neutral // terminal 87 Differential 32R // 32F Reverse power_R // Directional power _ F (3 ph measure) 32O Overpower 32L Low forward power 81O ...
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