LEM

Address:
Chemin des Aulx 8
Plan-les-Ouates/Genève

CH-1228
Switzerland

Phone: +41 (22) 706 1257

Web: www.lem.com


LEM articles

Displaying 1 - 20 of 50

Surface mount isolated current transducers have an integrated current conductor

Surface mount isolated current transducers have an integrated current conductor
PCIM Europe 2017: LEM introduces the GO series, expanding its miniature, IC transducers range for AC and DC isolated current measurement up to 300kHz.
16th May 2017

How fluxgate technology drives innovation

How fluxgate technology  drives innovation
The use of fluxgate technology in transducers for precise current measurement is well-known. Now, technology innovations take fluxgate current transducers to previously unattainable performance levels, says LEM Europe LEM Europe at PCIM Europe 2017: Stand 9-204
5th May 2017

Thin and flexible coils look to empower smart cities

Thin and flexible coils look to empower smart cities
LEM has upgraded its 'ART' Rogowski current sensor so that it measures current of up to 10,000A AC and beyond with class accuracy 0.5. The ART achieves IEC 61869 Class 0.5 accuracy without the need for additional components like resistors or potentiometers, which can drift over time. 
9th February 2017


Compact transducer with new improved accuracy

Compact transducer with new improved accuracy
Designed for insulated nominal voltage measurements in traction applications is the DVM series from LEM. This family of devices spans the range from 600-4200 VRMS and incorporates LEM’s proven and patented insulating technology. Despite achieving very high levels of isolation with a safety insulation voltage of 12kV, the DVM transducer is compact, measuring only 138x63.4x69mm.
21st September 2016

Isolated current transducers integrate current conductor

Isolated current transducers integrate current conductor
Designed for AC and DC isolated current measurement up to 100KHz, the GHS series of miniature, IC transducers has been announced by LEM. These components offer full isolation despite their small size, integrating the primary conductor for nominal current measurements of 10, 12, 16 or 20A with a measurement span of 2.5 times the nominal current, they are also able to support high overload currents up to 200A peak for short durations (1ms).
2nd August 2016

Current sensors use Rogowski coils to measure 10,000A AC for smart cities

Current sensors use Rogowski coils to measure 10,000A AC for smart cities
Split-core current transformers and split core, thin, light flexible Rogowski coils for smart grid applications, such as power generators, home energy management, battery monitoring systems, medium voltage/low voltage sub-stations, sub-metering, EV stations and solar power plants.
13th May 2016

Digital output added to open-loop Hall effect transducers

Digital output added to open-loop Hall effect transducers
Digital output versions of HO and HLSR open-loop Hall effect current transducers with analogue to digital (A/D) conversion performed by an on-board sigma-delta modulator, giving a 1-bit serial bitstream output have been launched by LEM. These new components for nominal current measurements of 10, 32, 50, 80, 100, 120, 150, 200, 250 ARMS in 3 different mechanical designs (PCB and panel mounting) provide up to 12 bit resolution with 20kHz bandwidth.
10th May 2016

Current transducers measure 25 to 100A DC, AC or pulsed

Current transducers measure 25 to 100A DC, AC or pulsed
Able to be mounted on PCBs or non-intrusive, isolated measurements of DC, AC and pulsed currents from 25 to 100A nominal, LEM has unveiled the LH transducer family. The LH 50-P and LH 100-P are designed for 50 and 100A nominal, respectively, while the LH 25-NP is a multi-range model that can be configured for 8, 12 or 25A, providing the equivalent of three transducers in one device.
10th May 2016

Transducers isolate nominal measurements

Transducers isolate nominal measurements
LEM has extended its range of high-accuracy current transducers, announcing the series of IT xx5 transducers for non-intrusive and isolated nominal measurements of DC, AC and pulsed currents from 60 to 600A. The new range includes four models: IT 65-S, IT 205-S, IT 405-S and IT 605-S.
22nd May 2015

ASIC design improves transducer performance

ASIC design improves transducer performance
  An ASIC with on-chip Hall sensing elements improves the offset and offset drift compared to former circuits improves the performance of closed-loop current transducers. Fabrice Salvi, LEM, explains.
6th May 2015

Transducers use ASIC based on Hall effect technology

Transducers use ASIC based on Hall effect technology
Designed for non-intrusive and isolated nominal measurements of DC, AC and pulsed currents from 100 to 2000A, four series of transducers have been released by LEM. The company have developed a way in which to make Hall effect technology realise the performance achieved by fluxgate technology, resulting in an ASIC based on Hall effect technology for use in closed loop mode. 
27th October 2014

LEM company overview

LEM provides innovative and high quality solutions for measuring electrical parameters for a broad range of applications in drives & welding, renewable energies & power supplies, traction, high precision, conventional and green cars businesses.
7th August 2014

ASIC-based current transducers extend range to 250A

ASIC-based current transducers extend range to 250A
PCIM 2014: Three HO series open-loop, Hall-effect ASIC-based current transducers have been released by LEM. They have a wide operating range of -40 to +105̊C. Stéphane Rollier says that the transducers are the only ones in the industry to offer over-current protection. The versatile devices offer a range of mounting options, PCB, panel or bus bar, and exploiting the aperture which measures 15 x 8mm, for cables and clamps.
21st May 2014

8x8mm aperture extends transducer options

8x8mm aperture extends transducer options
LEM has added three new members to its HO series of PCB-through-hole mounting current transducers, which provide an aperture of 8 x 8 mm to carry the primary conductor under measurement, extending the options for this form-factor. The new models, for 6, 10 or 25 A nominal measurements of DC, AC, and pulsed signals benefit from the revised LEM Open-loop Hall-effect ASIC (Application Specific Integrated Circuit) introduced several months ago with the launch of the HO 8, 15 and 25-NP & –NSM models.  
7th April 2014

LEM Announce Participation At PCIM Europe 2013

LEM Announce Participation At PCIM Europe 2013
LEM will be exhibiting at PCIM 2013 in Nuremberg this year, the international conference and exhibition for power electronics and intelligent motion. On show will be their range of current and voltage transducers that are used in a broad variety of applications in drives & welding, renewable energy & power supplies, traction, high-precision, energy solutions, conventional and green cars.
17th April 2013

LEM Adds High-Accuracy 130A And 150A Current Transducers To PCB-Mount Range

LEM Adds High-Accuracy 130A And 150A Current Transducers To PCB-Mount Range
LEM has introduced the LA 130-150 series of current transducers for use in motor drives, inverters, power supplies and general industrial applications. These printed-circuit board mounted devices share a common, compact case outline, and are available to measure nominal full-scale currents of 130 and 150 ARMS. Thanks to the application of LEM's established expertise in Closed-Loop Hall Effect transducer technology, the LA 130-150 series offers high-accuracy, extremely linear measurements at a very competitive price.
23rd January 2013

LEM's new user-programmable HO current transducers

LEM's new user-programmable HO current transducers
LEM announces the HO series of current transducers, setting a new standard of performance, programmability and ease-of-use for designers of the latest generation of motor drives and inverters. The HO series of open-loop ASIC based current transducers deliver better performance in areas such as thermal drift, response time, power supply and noise driven by technology advances in power electronics applications.
9th May 2012

LEM lance la gamme de capteurs ITZ pour la mesure ultra précise de courants allant jusqu’à 24 kA

LEM a lancé la série de capteurs ITZ avec isolation galvanique pour la mesure ultra précise de courants alternatifs, continus et pulsés pour les applications industrielles et en laboratoire.
9th February 2012

LEM announces ITZ transducer series of ultra-accurate current measurement up to 24 kA

LEM announces ITZ transducer series of ultra-accurate current measurement up to 24 kA
LEM has introduced the ITZ series of transducers for galvanically-isolated, ultra-accurate precision DC, AC and pulsed current measurements in industrial and laboratory applications. The high-accuracy product range comprises a series of transducers for nominal current measurements from 600 A to 24 kA, that provide overall accuracies at ambient temperature (25°C) of only a few ppm (parts per million: 1 ppm = 0.0001%).
1st February 2012

LEM’s CTSR current transducers combine safety and high performance in solar installations

LEM’s CTSR current transducers combine safety and high performance in solar installations
LEM has introduced the CTSR family of current transducers for use in a range of safety-critical applications including solar installations.
18th May 2011


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