ARU Series

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

Outdoor Rogowski coil for electronic measurement

The ARU series is an outdoor flexible clip-around Rogowski coil for the electronic measurement of AC current with galvanic separation between the primary circuit (power) and the secondary circuit (measurement). The patented Perfect Loop Technology dramatically reduces both the error due to the position of the measured conductor within the aperture, and the error due to the proximity of external conductors.

In addition, the ARU series internal shield allows for an enhanced measurement accuracy at low primary current.

That Rogowski coil technology series of products are designed for both industrial and smart grid application domains.

ARU Series - Features and benefits

ARU rogowski coil current sensor

Main characteristics

  • Class accuracy 0.5 according to IEC 61869-10 and IEC 61869-6
  • Better than 1% 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

Typical applications

  • 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
  • Outdoor substations
  • Underground substations
  • Pole-mounted transformers
  • Overhead lines
  • Distributions system equipment

ARU Series - Download & Technical characteristics

ProductOrderDocumentNominal ValueOp. TemperatureOutput voltageApertureOutput cable length
ARU-B100-D125Datasheet
3D
1000 A-40 °C / 80 °C100 mV/kA125 mm1,5 m
ARU-B100-D125/SP3Datasheet1000 A-40 °C / 80 °C100 mV/kA125 mm3 m
ARU-B100-D125/SP4Datasheet1000 A-40 °C / 80 °C100 mV/kA125 mm4 m
ARU-B100-D125/SP6Datasheet1000 A-40 °C / 80 °C100 mV/kA125 mm6 m
ARU-B100-D175Datasheet
3D
1000 A-40 °C / 80 °C100 mV/kA175 mm1,5 m
ARU-B100-D175/SP3Datasheet1000 A-40 °C / 80 °C100 mV/kA175 mm3 m
ARU-B100-D175/SP4Datasheet1000 A-40 °C / 80 °C100 mV/kA175 mm4 m
ARU-B100-D175/SP6Datasheet1000 A-40 °C / 80 °C100 mV/kA175 mm6 m
ARU-B100-D250Datasheet
3D
1000 A-40 °C / 80 °C100 mV/kA250 mm1,5 m
ARU-B100-D250/SP3Datasheet1000 A-40 °C / 80 °C100 mV/kA250 mm3 m
ARU-B100-D250/SP4Datasheet1000 A-40 °C / 80 °C100 mV/kA250 mm4 m
ARU-B100-D250/SP6Datasheet1000 A-40 °C / 80 °C100 mV/kA250 mm6 m
ARU-B100-D300Datasheet
3D
1000 A-40 °C / 80 °C100 mV/kA300 mm1,5 m
ARU-B100-D300/SP3Datasheet1000 A-40 °C / 80 °C100 mV/kA300 mm3  m
ARU-B100-D300/SP4Datasheet1000 A-40 °C / 80 °C100 mV/kA300 mm4  m
ARU-B100-D300/SP6Datasheet1000 A-40 °C / 80 °C100 mV/kA300 mm6 m

ARU Series - Ask for samples / quotation

Looking to receive samples or a quotation? Please click on the contact button below and provide us with the information you need on this product series. Our sales team will get back to you shortly.

Contact Us