Nama Relay Kode ANSI Lambang IEC Over Speed Relay 12 Under Speed Relay 14 Distance Relay 21 Over Temperature Relay 26 Under Voltage Relay 27 Over voltage Relay 59 Directional Overpower Relay 32 Negative Sequence Relay 46 Negative Sequence Voltage Relay 47 Thermal Relay 49 Instantaneous Overcurrent Relay 50 Inverse TimeOvercurrent Relay 51 Inverse Time Earth Fault Overcurrent Relay 50G Definite Time Earth Fault Overcurrent Relay 51N Voltage Restrained/controlled Overcurrent Relay 51V Power Factor Relay 55 Neutral Point Displacement relay 59 Earth fault Relay 64 Directional Overcurrent Relay 67 Directional EarthFault Relay 67N Phase Angle Relay 78 Autoreclose Relay 79 Underfrequency Relay 81U Overfrequency relay 81O Differential Relay 87