Traction & Trackside

Isolated measurement of current, voltage and power

Modes of public transport such as high-speed trains, city transit systems and freight trains provide the ideal solution to meet the increased demand for more mobility whilst helping to fight pollution and traffic congestion. Power electronics is essential to driving and controlling energy in these systems. New requirements are continuously emerging in the railway industry, such as the demand for energy measurement, track objects monitoring and a need to constantly improve maintenance infrastructures.

Typical applications of LEM products:

• Main converter for urban transportation systems (metros - trams – trolleybuses)
• Track objects monitoring
• Sub-stations
• Inverters, converters, rectifiers
• Auxiliary power units
• Circuit breaker, for transformers, DC link
• Control and safety systems
• Energy metering
• Rolling stock heavy traction, diesel electric
• Mining trucks

A complete range of accurate, reliable and galvanically-isolated transducers for the measurement of current from 0.1A to 20,000A and voltage from 10V to 6,400V provides control and protection signals on-board as well as for trackside applications.

LEM transducers are CE marked in recognition of their electromagnetic compatibility and their compliance to EMC standards. Their reference standard is EN 50155 for the electrical performance and environmental constraints as well as EN 50124-1 for creepage and clearance distances design versus the required insulation levels.

Our head office in Geneva, LEM SA, is IRIS certified since September 2007. This certification will soon become a real system of reference for the market players. IRIS will supplement the ISO 9001 certification principles with the specific needs for the traction and trackside market demands.