The devices are designed for measurement in electrical distribution systems or industrial plants and machines. 

• Measuring input:
  Nominal voltage 57.7...277 V_LN, 100...480 V_LL
  Nominal current 1 / 5 A
  Frequency range 45...50/60...65 Hz
• System types:
  One-phase system, 2-wire
  three-phase, 3 or 4 wire asymmetrical
• Power supply : 60...300 V AC/DC
• Accuracy: Voltage and current ±0.5 %
  Active power ±0.5 %
  Reactive power ±1.0 %
  Power factor ±3.0°
  THD U,I ±2,0 %
  Active energy Class 1.0
  Reactive energy Class 2
• Outputs: 4000 pulses/kWh
• Interface: RS485 (Modbus RTU)
• Display: LCD display, 1 line, 3 measured values, 4 digits each
• Meters: Active and reactive energy meter incoming and outgoing
  Counters: Operating hours counter for one consumer and the device itself
• Safety: Double insulation
  Degree of pollution: 2
  Overvoltage category: CAT III 300 V
  Protection rating: Front IP50, housing IP20
• Dimensions: Control panel installation: 96 x 96 x 35/55 mm