A21T – Transformer Protection Relay

A21T

Model Functional Details Cabinet Style
A21T Transformer Protection Relay CSE


ANSI Code Description
46 Negative Phase Sequence Protection
49 Thermal Overload Protection
50 Instantaneous/Definite time phase over current Protection
51 Inverse Time Phase Over current Protection
50N Instantaneous/Definite Time Ground Over current Protection
51N Inverse Time Ground Over current Protection
64G High Impedance Restricted Earth Fault Protection
50BF Breaker Failure
86 Lockout (Trip command)
87T Two Winding Phase Differential Protection