• According to IEC 255, VDE 0435 part 303
• Monitoring of
   -  Under - and overvoltage
   -  Asymmetry
   -  Phase failure
• Intensitive to hermonics up to distortion factor K 20%
• Release time adjustable between 0,1 ... 5 s  
• One LED in ease for
  -  Auxiliary voltage A1/A2
  -  Overvoltage U_max.
  -  Overvoltage Umax.
   -   Undervoltage Umax.
  -  Asymmetry / Phase sequence / Power failure
  -  Contact position
• Closed circuit operation  
• Available open circuit operation
• 2 changeover contacts
• Width 45 mm

Input
• Nominal voltage U_N:      
L1/L2/L3                        3Ac 230,400,690 V                       
                                    ( other voltages on request
Overload   cap acity of     1,5/60U_N /2U_N (10S)max. 1000 V
Nominal  frequejmcy U_N    50/60 Hz
Frequency range of U_N     45...65 Hz
Accuracy:                        ≤±0,5% of  U_N
Power consumption withU_NL1 approx. 0,5 mA
                                     L2 approx. 0,5 mA
                                     L3 approx. 0,8 mA