LEM has developed the Rogowski coils range to measure current up to 300000 A AC with accuracy class 0.5. The ARU range achieves IEC 61869-10 class 0.5 without the need for additional components such as resistors or potentiometers to calibrate the coil, which can drift over time. The range benefits from ‘Perfect Loop’ technology, a unique patented coil clasp that eliminates the inaccuracy caused by sensitivity to the position of the conductor inside the loop. This technology provides an innovative, robust and fast ‘Twist and Click’ closure.
Compared with the previous LEM Rogowski coils ART, the ARU range can be installed outdoors as the models are compliant with UV, water, dust and ice resistance standards.
The ARU range allows the coil disconnection to be detected by a security seal passed through a specially designed slot, making it useful when used with a metering device. They can be used in applications requiring a protection degree up to IP 68.
The models include an accuracy class 0.5 and complete the LEM product portfolio for the AC current measurement. LEM is dedicated to future distribution network applications and offers innovative and high-quality solutions for measuring electrical parameters into the Smart Grid.
The Smart Grid is in the middle of 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, providing 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.
LEM – Life Energy Motion
Leading the world in electrical measurement, LEM engineers the best solutions in energy and mobility, ensuring that customers' solutions are optimized, reliable and safe.
Our 1,500 people in over 15 countries transform technology potential into powerful answers. We develop and recruit the best global talent, working at the forefront of mega trends such as renewable energy, mobility, automation and digitization.
With innovative electrical solutions, we are helping our customers and society accelerate the transition to a sustainable future.
Its core products - current and voltage sensors - are used in a broad range of applications in drives & welding, renewable energies & power supplies, traction, high precision, Smart-Grid, conventional and green car businesses.
LEM is a mid-size, global company with production plants in Geneva (Switzerland), Sofia (Bulgaria), Beijing (China) and Machida (Japan). With its regional sales offices close to its clients’ locations, the company offers seamless service around the globe.
Listed on the SIX Swiss Exchange since 1986, the company’s ticker symbol is LEHN.
For further information please contact:
Stéphane Rollier Claire Davis
Product & MarComs Manager Account Manager
Tel: +41 22 706 1449 Tel +44 (0) 1243 531123