Underfrequency Relay : BF1-U

Range

• Rated voltage Un : 110 V, 230 V, 400 V AC
• frequency range at
  50 Hz rated frequency : 46 – 50 Hz
  60 Hz rated frequency : 55.2 – 60 Hz
• Tolerance : ± 1 % of of rated frequency
• Hysteresis : 0.5 % of of rated frequency
• power consumption : 3.7 VA
• Thermal load carrying : continuously 1.3 x Un capacity
• Returning time : 250 ms
• Minimum operating time : 250 ms