Relay Device Functions
Device No. |
Description |
Suffix |
Description |
---|---|---|---|
46 |
Phase Balance Current Relay |
P |
Phase |
49 |
Thermal Relay |
G |
Ground |
50 |
Instantaneous Overcurrent Relay |
N |
Neutral |
51 |
Time Overcurrent Relay |
Q |
Negative Sequence |
51/50 |
Time and Instantaneous Overcurrent Relay |
IAC |
IAC Curves |
67 |
AC Directional Overcurrent Relay |
IEEE |
IEEE Curves |
79 |
AC Reclosing Relay |
IEC |
IEC Curves |
87 |
Differential Protective Relay |
DT |
Definite Time Curves |