ANSI Code | Description |
21 | Phase Impedance Protection |
21N | Ground Voltage Protection |
27 | Under Voltage Protection |
46 | Negative Phase Sequence Protection |
46BC | Broken Conductor Detection |
47 | Negative Phase Sequence Over Voltage 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 |
59 | Over Voltage Protection |
59N | Residual Over Voltage Protection |
FLC | Fault locator |
67P | Directional Phase Over current Protection |
67N | Directional Ground Over current Protection |
68 | Out of Step Protection |
50BF | Breaker Failure |
VTS | VT Supervision Detection |
CTS | CT Supervision Detection |
79 | Auto reclosing |
86 | Lockout (Trip command) |