Company Information

LEM is the market leader in providing innovative and high quality solutions for measuring electrical parameters. Its core products - current and voltage transducers - are used in a broad range of applications in drives and welding, renewable energies, UPS, power supplies, traction, high precision, conventional and green cars businesses. LEM’s strategy is to exploit the intrinsic strengths of its core business, and to develop opportunities in existing and new markets with new applications. It has production plants in Beijing (China), Geneva (Switzerland), Sofia (Bulgaria) and Tokyo (Japan). With regional sales offices near its customers’ locations, the company is able to offer a seamless service around the globe. LEM has been listed on the SIX Swiss Exchange since 1986; the company’s ticker symbol is LEHN.

LEM has been listed on the SIX Swiss Exchange since 1986; the company’s ticker symbol is LEHN.

LEM solutions for traction electrical measurements

Today, high speed trains, city transit systems (metro, trams, and trolleybuses) and freight trains are the solutions against pollution and interstate traffic immobility and provide a significant energy savings. Power electronics is essential to drive and control energy in these transportation systems. LEM has been a main player in traction power electronics applications and development for the last 45 years and leverages this vast experience to supply solutions for isolated current and voltage measurements.

LEM transducers provide control and protection signals to power converters and inverters that regulate energy to the electric motors (for propulsion) and to the auxiliaries (for air conditioning, heating, lighting, electrical doors, ventilation, etc.). This includes the early monitoring of the voltage network (changing by crossing the European borders) to make the powers electronics working accordingly.　Although this is true for on-board applications, LEM has also provided the same control and protection signals for wayside substations.

The rail industry is under constant changes and evolution. As a recent example, the privatization of the rail networks raised new requirements for which LEM provides: the on board monitoring of power consumption (EM4T II Energy Meter), solutions to trackside applications, rail maintenance and the monitoring of points (switches) machines or signaling conditions with some new transducers families.  LEM is always available to assist in adapting to these evolving technical applications.

Four decades of railway experience has contributed to establishing LEM as a market leader with worldwide presence to serve you and provide the efficient, safe and reliable operation of the railways. With more than 2500 current and voltage transducers in its portfolio, LEM offers a complete range of accurate, reliable and galvanically isolated devices for the measurement of currents from 0.01 A to 20000 A and voltages from 10 V to 6400 V in various technologies: Open Loop, Closed Loop, Isolating digital technology, etc.

LEM transducers for railway applications are designed according to the most demanding international standards (EN50155, EN50124-1, NFF 16101, 16102, etc) and carry CE marking. UL or UR is also available on selected models. We have worldwide ISO 9000 and ISO TS 16949 and IRIS qualification and offer a 5-year warranty on all of our products. LEM constantly innovates and strives to improve the performance, cost and sizes of its products. LEM is a worldwide company with offices across the globe and production facilities in Europe (included Russia), Asia and America.

Innovation

Since 1972, LEM has continued to invest in research and development to meet customer demands. With this investment, LEM not only created new products, but also introduced new features that create value-added competitive advantages in the final application, improving existing product performance, cost efficiency, and size.  LEM believes that close relationships with customers are the key to discovering and developing future products. LEM's extensive product portfolio uses seven key technologies to meet the needs of the market. These technologies produce a wide range of electrically insulated current and voltage transducers, making them industry standard in the field of measurement.

Quality and environment

It is considered a top priority for LEM to continuously improve the quality of our products and services to meet and exceed customer requirements. Our commitment to quality is geared towards satisfying our customers, employees and shareholders with the aim of maintaining our leadership position as the provider of innovative solutions for current and voltage measurement. LEM – committed to quality products and services.

LEM will contribute to the development of society under the new brand of

Life Energy Motion.