LEM
United States

LEM USA Inc.

11665 West Bradley Road
Milwaukee, WI, 53224
United States

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ARU Series

Unique, IP68, ruggedized outdoor flexible split-core AC current sensor implementing high accuracy Rogowski Coil technology.

ARU Series

Main characteristics:

  • Class accuracy 0.5 according to IEC 61869-10 and IEC 61869-6 regardless of primary conductor position
  • Better than 0.75% accuracy regardless of the primary conductor’s position
  • Rated insulation voltage 1kV CATIII
  • From 1 to 300000 ARMS
  • Flexible split-core current sensor for easy installation anywhere
  • Almost perfect linearity, no saturation, no upper limit in current rating
  • Internal shield
  • Low output voltage proportional to the rate of change (derivative) of the primary current (electronic integrator required): 100 mV/kA @ 50Hz

Features:

  • 10.4 mm gauge with sensing apertures of Ø 70mm to 300mm
  • UV, water, dust and ice resistant for outdoor installations
  • Bandwidth: 50/60 Hz
  • Operating range: -40°C to +80°C
  • Fast clip-on mounting whilst cable is connected
  • Robust and fast ‘Twist and Click’ closure.
  • Slot expected to fix the loop on conductor with a cable tie
  • Ø 2.4 mm hole to pass a security seal
  • Tie shape models available
  • Distribution network applications such as Distribution Automation for Fault Detection, Isolation & Restoration, Grid Monitoring (e.g. Intelligent substations), Protection & Safety, Distribution Transformer Monitoring, Distribution Automation for Voltage Control and Power Quality

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