LEM ART-B22-D125-SP3 + AI-PMUL, Single Phase Rogowski Coil Set, Class 1, User Selectable 0.333v, 0.166v, True RMS 4-20mA, 0-20mA, 0-10V, 0-5V Outputs, Sensitivity, and Measurement Range, 12.5cm Diameter

The universal Rogowski coil integrator AI-PMUL complements LEM’s flexible clip-around coil ART and ARU range. The design is based on digital processing to give combined dynamic range, accuracy and versatility of use. It offers a wide range of output signals both RMS and instantaneous. AI-PMUL is DIN rail mounted and can be stacked for multiphase application without spacing thanks to its low power dissipation.

Input signal

• Accuracy Class 1 (IEC 61869-2) ^[1].
• Linearity error ≤ 0.10 %. Protection degree IP2X.
• 35 mm DIN rail mounted.
• Push-in terminals.
• 4 selectable true RMS output signals: 0…20 mA, 4…20 mA, 0…5 V, 0…10 V.

• 2 selectable instantaneous output signals: 225 mV, 333 mV.
• 6 selectable sensitivities depending on Rogowski coil: 22.5, 70, 80, 85, 100, 120 mV/kA at 50 Hz.

• 12 selectable ranges: 100, 200, 300, 400, 500, 600, 800, 1000, 1500, 2000, 4000, 5000 A.
• Ambient operating temperature −25...+70 °C.

Advantages

• Compact design for DIN rail assembly
• High accuracy Class 1 (IEC 61869-2)
• Setup by user via Select / Edit buttons
• Clear status indication via bi-color led

Applications

• MV/LV substations on LV side: Transformer Condition Monitoring
• Power metering: current measurement for active power calculation
• Building sub-metering: energy efficiency monitoring, consumption analysis and cost allocation
• Power quality monitoring: electrical loads and distribution system equipment
• Fault Detection, Isolation and Repair (FDIR): isolate the site of the fault
• Remote Terminal Units (RTU)
• Phasor Measurement Units (PMU)

Standards

• IEC 61010-1: 2010
• UL
• EMC: IEC 61326-1:2012

Options

Cross Power Plug-in: side contacts to stack up to 3 Integrator modules and use only one power supply.

Specification

Datasheet

• AI-PMUL Datasheet
• ART Series Datasheet

Application Notes

• User Notice

1) The Rogowski coil can measure any primary current as there is no saturation effect.

2) Not tested given that in the worst case (load = 0 Ohm i.e. short circuit on the output) the peak dissipated power remains low (< 2 Watts)

3) Frequency bandwidth and phase shift modelling schematic can be provided on request.

4) Referring to the main phase offset of 90 ° (a Rogowski coil is a derivative current transducer)

5) Considering a primary conductor of at least ⌀ 15 mm, perpendicular and in contact with the Rogowski coil.

6) Considering an external conductor of at least ⌀ 15 mm the same current level than internal conductor, perpendicular and in contact with the Rogowski coil.