Power supplies solutions

Power supply based applications using devices made up of power electronics (chargers, DC links, batteries, inverters and/or rectifiers) all require efficient current control, monitoring, regulation and protection. This is necessary to ensure their integrity and normal functioning.

LEM transducers ensure:

  • stable power supply
  • accurate currents conversions depending on the various stages
  • timely information in case of corrections or potential switching
  • quick reactions in the event of emergency and failure.

Main applications for Power Supplies

LEM - power supply banner
LEM - power supply - Antenna

Current sensors are paramount to an efficient and operational grid.


In many applications, the voltage from the grid is too high or has to be converted to DC voltage or to a different AC waveform. It is therefore transformed by modern power electronics. A transducer measures the output current to ensure stable power supply.


Power supply is critical for the effective function of applications such as cell phones base stations or hospitals security systems who must always remain operational. In case of failure (short circuit, unexpected connection to earth, etc.) or fault in the grid interrupting the power, batteries or Uninterruptible Power Supplies (UPS) temporarily provide emergency power. Transducers are used to control the charge and discharge of these batteries as well as the switch to the batteries and UPS.

Typical applications for Power Supplies

  • UPS: Uninterruptible Power Supplies
  • SMPS: Switched Mode Power Supplies
  • Telecom power supplies
  • Airport lighting power supplies
  • Lighting power controller
  • Battery chargers

Products for Power Supplies

Power supply application






Application example


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 power supply-based application :
- IEC 62040-1 & IEC 60950-1 for safety
- IEC 61800-1 & IEC 61800-2 for climatic and mechanical constraints
- IEC 62040-2 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

Need help with a project?

You have a project in line with that application and want to discuss it with LEM?

Click on the contact button below and our experts will help you find the best solutions for your needs.

Contact us