Smart Grid Transducers: Applications & Products
The intelligent electricity network (Smart Grid) is the backbone of the energy system. Our energy system is amidst a radical transition, as millions of electric vehicles hit the roads and Terawatts of renewable energy capacity are installed in our grids. Smarter equipment is needed for the Smart Grid to provide reliable integration of intermittent renewable energies and distributed energy resources. LEM improves the grid by measuring electrical parameters allowing control rooms to automate, monitor remotely and share real-time equipment data.
Main Applications for Smart Grid
The intelligent electricity network (Smart Grid) is the backbone of the energy system. Our energy system is amidst a radical transition, as millions of electric vehicles hit the roads and Terawatts of renewable energy capacity are installed in our grids. Smarter equipment is needed for the Smart Grid to provide reliable integration of intermittent renewable energies and distributed energy resources. LEM improves the grid by measuring electrical parameters allowing control rooms to automate, monitor remotely and share real-time equipment data.
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Typical Applications for Smart Grid
- Distribution Automation – Fault Detection, Isolation & Restoration
- Grid Monitoring (e.g. Intelligent substations)
- Protection & Safety
- Distribution Transformer Monitoring
- Distribution Automation – Voltage Control
- Power Quality

OVERVIEW
Products for Smart Grid
LEM provides innovative, accurate, reliable, easy-to install, non-intrusive current sensors for better performance of the grid and smarter cities.





Integrator AI-PMUL Series

Main Characteristics
- Integrator for Rogowski coils
- Signal conditioner of Rogowski coils secondary signal
- Linearity error below 0.1%
- Combined with LEM ART & ARU class 0.5 Rogowski coils, it offers a universal metering and monitoring solution
- DIN Rail mounting
Features
- 12 current ranges selection from 100 to 5000 A
- 6 Rogowski coil sensitivity selection from 22.5 to 120 mV/KA
- 6 possible outputs selection: 4 true RMS outputs: 0-20 mA, 4-20 mA, 0-5 V & 0-10 V and 2 instantaneous voltage outputs: 0-225 mV and 0-333 mV
- Simple configuration through 2 buttons
- Visible bi-colour led indicating the status
- Operating temperature range -25°C to +70°C
- Single supply voltage +24 V
Remarks
- SMA coaxial connector for small current measurement is proposed as option
- 3 integrators AI-PMUL can be stacked together with an optional connector to share a single power supply
- A 1 A instantaneous output version is foreseen soon
Quality
Certificates and standards
Compliance with the highest industry standards
LEM products and processes comply with reference standards in the industry:
- CE marking of LEM transducers in recognition of their electromagnetic compatibility
- IEC standards for automation applications:
- IEC 61869-2,-6,-8, -10, -14, -15 for performances
- IEC 61010-1, -2-030, -2-032, -031 for safety
- IEC 61800-1 & -2 for climatic and mechanical constraints
- IEC 61000-6-2 & -6-3 or IEC 61326-1 for EMC
- RoHS compliant
- ISO TS 16949 certification of all production and development centers (Switzerland and China)
Quality products and services: our priority
Based on our deep knowledge of applications and current measurement technologies, LEM develops both catalog and customized products which can be perfectly tailored to meet your needs in terms of performance, space requirement and cost.