Protective Device Numbers, ANSI
Protective Device Numbers, ANSI :
2 Time-delay, 21 Distance, 25 Synchronism-check, 27 Undervoltage, 30 Annunciator, 32 Directional power, 37 Undercurrent or underpower, 38 Bearing, 40 Field, 46 Reverse-phase, 47 Phase-sequence voltage, 49 Thermal, 50 Instantaneous overcurrent, 51 AC time overcurrent, 59 Overvoltage, 60 Voltage balance, 63 Pressure, 64 Apparatus ground, 67 AC directional overcurrent, 68 Blocking, 69 Permissive, 74 Alarm, 76 DC overcurrent, 78 Out-of-step, 79 AC reclosing, 81 Frequency, 85 Carrier or pilot-wire, 86 Lock out, 87 Differential, 94 Tripping
No records Found