• According to IEC 255, VDE 0435 part 303
• For nominal voltage from 3 AC 230V to 500V 
• Detection of 
  - voltage asymmetry
  - wrong phase sequence
  - phase failure
• Detection of feedback voltage
• BA 9042 optionally with adjustable time delay
• Closed circuit operation
• BA9042 LED indicators for operation and state of contacts
• Width 45 mm
Input
• Nominal voltage U_N:           3 AC 190, 230, 400, 415, 440, 500 V
• Voltage range:                  0,8 ...1,1 U_N
• Nominal consumption:        ≤50/60Hz 
• Frequency range:              ±5%