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
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
| Product | Order | Document | Nominal Value | Op. Temperature | Output voltage | Aperture | Output cable length |
|---|---|---|---|---|---|---|---|
| ARU-B100-D125 | Datasheet 3D | 1000 A | -40 °C / 80 °C | 100 mV/kA | 125 mm | 1,5 m | |
| ARU-B100-D125/SP3 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 125 mm | 3 m | |
| ARU-B100-D125/SP4 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 125 mm | 4 m | |
| ARU-B100-D125/SP6 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 125 mm | 6 m | |
| ARU-B100-D175 | Datasheet 3D | 1000 A | -40 °C / 80 °C | 100 mV/kA | 175 mm | 1,5 m | |
| ARU-B100-D175/SP3 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 175 mm | 3 m | |
| ARU-B100-D175/SP4 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 175 mm | 4 m | |
| ARU-B100-D175/SP6 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 175 mm | 6 m | |
| ARU-B100-D250 | Datasheet 3D | 1000 A | -40 °C / 80 °C | 100 mV/kA | 250 mm | 1,5 m | |
| ARU-B100-D250/SP3 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 250 mm | 3 m | |
| ARU-B100-D250/SP4 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 250 mm | 4 m | |
| ARU-B100-D250/SP6 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 250 mm | 6 m | |
| ARU-B100-D300 | Datasheet 3D | 1000 A | -40 °C / 80 °C | 100 mV/kA | 300 mm | 1,5 m | |
| ARU-B100-D300/SP3 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 300 mm | 3 m | |
| ARU-B100-D300/SP4 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 300 mm | 4 m | |
| ARU-B100-D300/SP6 | Datasheet | 1000 A | -40 °C / 80 °C | 100 mV/kA | 300 mm | 6 m |
ARU Series - Ask for samples / quotation
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