LEM AI-PMUL Universal Integrator for Rogowski Coils, Multi Range Input (100 to 5000 Amp) and Output (0.333V,0.225), and True RMS outputs (4-20mA,0-20mA,0-5V,0-10V), Adjustable Sensitivity(22.5,70,80,85,100,120mV/kA), Din Rail Mount
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 True RMS and instantaneous. AI-PMUL is DIN rail mounted and can be stacked for multiphase application without spacing thanks to its low power dissipation. optional
Input signal
- Accuracy Class 0.5 (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 0.5 (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
: side contacts to stack up to 3 Integrator modules and use only one power supply.
24VDC Power Supply Meanwell
Specification
| LEM Part Number | AI-PMUL |
| Function | Integrator and True RMS Conditioner for Rogowski Coils |
| Measuring Range | Selectable 5000,4000,2000,1500,1000,800,600,500,400,300,200,100Amp |
| Sensitivity | Selectable 22.5,70,80,85,100,120mV/kA @ 50 Hz |
| Output | Selectable; Signal Conditioned True RMS 0-20mA, True RMS 4-20mA, True RMS 5V, True RMS 10V or 225mV, 333mV Direct Output (1 Amp output coming soon) |
| Frequency Measuring Range | 50-1500Hz (15th Harmonic) |
| Operating Voltage | 10-32VDC |
| Accuracy | 0.5% from 25 to 5000 Amp |
| Current Consumption | 100mA (max) |
| Dimensions | 100mm x 78mm x 15mm |
| Mounting | Din Rail Mount |
| Integrator to Meter cable | User Supplied Shielded cable 6mm sqr, up to 6m long |
| Operating Temperature | -25°C - 70°C |
| Storage Temperature | -45°C to 80°C |
| Isolation (50Hz, 1 min) | 1.5kV |
| True RMS Response Time | 160-190ms |
| Termination Style | Push-in for 1.5mm sqr wire |
| Weight | 58g |
| Factory Pack Qty | 1 |
| Certifications | UL, ROHS |
Datasheet
Application Notes
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.
