Example: dental hygienist
MiCOM Protection Relay Series Selection Guide
87 Differential 32R // 32F Reverse power_R // Directional power _ F (3 ph measure) 32O Overpower 32L Low forward power 81O Overfrequency 81U Underfrequency 81R Rate of change of frequency _ df/dt / ROCOF / 81AB Turbine abnormal frequency VVS* Voltage vector shift _ dU > 40 Loss of field 24 Overfuxing_U/Hz 51V Voltage dependent overcurrent
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