| ANSI Code |
Description |
| 21 |
Back up Impedance Protection |
| 24 |
Over excitation Protection |
| 27 |
Under Voltage Protection |
| 27TN |
3rd Harmonic Under Voltage Protection |
| 32 |
Directional Power Protection |
| 40G |
Loss of Excitation 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 |
| 51VC |
Voltage control over current Protection |
| 55 |
Power factor Protection |
| 59 |
Over Voltage Protection |
| 59N |
Residual Over Voltage Protection |
| 64G |
High Impedance Restricted Earth Fault Protection |
| 64S |
0-95% Stator earth fault Protection |
| 67P |
Directional Phase Over current Protection |
| 67N |
Directional Ground Over current Protection |
| 78 |
Out of Step Protection |
| 81 |
Under & Over Frequency Protection |
| 50BF |
Breaker Failure |
| VTS |
VT Supervision Detection |
| CTS |
CT Supervision Detection |
| 79 |
Auto reclosing |
| 86 |
Lockout (Trip command) |
