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 |
