ATO Series

Split-core current transformer with high accuracy and low phase shift.


ATO Series

ATO Series

Please find here the product list


Main characteristics:

  • Measurement of AC primary currents from 0 to 125A
  • Current (ratio 1mA/A) or voltage output (ration 225 or 333mV @ IPr)
  • Class accuracy 1 (voltage output) & 3 (current output) according to IEC 61869 standard
  • Compact
  • Self-powered
  • 10 & 16 mm diameter aperture
  • Frequency: 50/60 Hz


  • Split-core type
  • Easy mounting
  • Cable output: 1m
  • Operating range: -10°C to +55°C for voltage output models, -25°C to +70°C for current output models
  • Rated insulation voltage 600V CATIII PD2, basic insulation
  • DIN rail adaptor (optional)

Download Technical Articles: IoT remote energy monitoring using LEM Split-Core CT (ATO) following the IEC 61869-2 Smart Grid standard
Download Technical Articles: Smart Building energy disaggregation Submeter with LEM Split-core CT ATO