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LEM

  • Chemin des Aulx 8 Plan-les-Ouates/Genève
    CH-1228
    Switzerland
  • +41 (22) 706 1257
  • http://www.lem.com

LEM Articles

Displaying 1 - 20 of 78
Events News
15th November 2022
LEM celebrating at electronica 2022

LEM will use electronica 2022 to illustrate how over 50 years it has pushed back the boundaries of electrical measurement technology to become a supplier of sensors and solutions to such sectors as renewables, automotive, railway and traction, charging infrastructures, energy distribution, high precision and automation.

Eco Innovation
14th September 2022
LEM launches its first plug-and-play solution for on-board train energy metering

LEM has now launched TEMA4G, its first plug-and-play solution for on-board train energy metering.

Latest
10th May 2022
LEM reinforces management team to prepare for growth

LEM has announced a major step towards strengthening its position as market leader in innovative, high-quality solutions for measuring electrical parameters with the appointment of renowned power electronic engineer Michael Sleven as Managing Director of LEM Europe GmbH and Head of Sales for Germany.

Test & Measurement
27th January 2022
LEM launches measurement transducer for T&M applications

LEM claim to offer record levels of accuracy performance in current sensing with the launch of its IN 200 current measurement transducer.

Sensors
23rd November 2021
Open loop sensor suits SiC MOSFET applications

A new high bandwidth (1MHz) open loop sensor capable of current sensing in some of the harshest environments has been introduced by LEM.

Products
21st October 2021
High accuracy transducer for trackside applications

LEM has introduced a new current transducer series, that can be used for retrofitting trackside applications or for reducing the cost of new installations. Due to its robust design and standardised 4-20 mA out, it can also be used in automation or the control of PV-plants. The transducer’s innovative primary circuit (patent pending), in combination with two ASiCs to detect the magnetic field, enables precise current measurement.

Sensors
31st March 2021
Leakage current sensor for EV charging stations

LEM has launched the CDSR, a new leakage current sensor based on its open-loop Fluxgate Technology. The CDSR is innovative, extremely compact and safe, allowing manufacturers to optimize the electronic design of their charger products.

Power
20th November 2020
Certified DC meter solution for EV chargers

LEM has launched its new DC meter solution, a smart and compact DC Billing Meter (DCBM), fully compliant with the German ‘Eichrecht’ regulation. The DCBM is a smart and compact billing solution that will help electric vehicle charging stations take advantage of the benefits of DC charging.

Sensors
10th December 2019
High isolated sensors range completed with included current conductor

LEM has expanded its range of miniature, integrated circuit sensors range for AC and DC isolated-current measurement with the introduction of the HMSR series. Despite their small size, the components can handle overload current bursts of up to 20 kA (8-20µs surge test profile), such as those that occur in photovoltaics applications while still providing a reinforced isolation. Products in the series are designed to measure currents of up to...

Analysis
26th November 2019
Rogowski coils for easy outdoor installation with Accuracy Class 0.5

LEM has announced the development of the Rogowski coils range to measure current up to 300,000A 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.

Sensors
26th November 2019
High isolated current sensors with current conductor

LEM has expanded its range of miniature, integrated circuit sensors range for AC and DC isolated-current measurement with the introduction of the HMSR series. Despite their small size, the components can handle overload current bursts of up to 20kA (8-20 us surge test profile), such as those that occur in photovoltaics applications while still providing a reinforced isolation.

Sensors
11th October 2019
Closed-loop current sensors achieve offset drift down to 3ppm/°C

The latest closed-loop Hall effect current sensors deliver the added performance of fluxgate sensors without the added cost.  LEM have recently launched six separate families of LxSR sensors called LXS, LXSR, LES, LESR, LKSR, LPSR.

Automotive
20th August 2019
Keeping trains moving; meeting new technology demands

A key element of the propulsion system for low speed urban transportation to high speed intercity trains is the traction converter that transforms the power from the power source, whether a catenary or diesel engine, to drive the electric motors.  By Michel Ghilardi, LEM Research & Development Senior Engineer

Power
6th December 2018
Fast and accurate isolated current measurement with mini transducers

A fast measurement speed, achieved within tight cost and size constraints while integrating the primary conductor in SO packages without compromising the necessary insulation, is often as critical as the other high performances for current measurement in motor-drive applications. That is why LEM’s GO miniature transducers have been designed to achieve a 2µs response time from 2 standard, cost-effective SO8 or SO16 packages for nominal...

Sensors
13th November 2018
Simplify energy monitoring with high-accuracy sensors

LEM's ART Rogowski current sensor measures currents of up to 10000A AC and beyond. The ART achieves IEC 61869 Class 0.5 accuracy without the need for additional components which can drift over time. The ART benefits from 'Perfect Loop' technology, a patented coil clasp that eliminated the inaccuracy caused by sensitivity to the position of the conductor inside the loop, as well as providing an innovative, robust and fast 'Twist and Click' Closure...

Power
13th September 2018
Next-gen closed loop current transducers achieve offset drift

  The latest closed-loop Hall effect current transducers deliver the added performance of fluxgate transducers without the added cost. LEM have recently launched six separate families of LxSR transducers called LXS, LXSR, LES, LESR, LKSR, LPSR. 

Test & Measurement
19th June 2018
Fast and accurate isolated current measurement with mini transducers

A fast measurement speed, achieved within tight cost and size constraints while integrating the primary conductor in SO packages without compromising the necessary insulation, is often as critical as the other high performances for current measurement in motor-drive applications. Therefore LEM has introduced the GO miniature transducers, which have been designed to achieve a 2µs response time from 2 standard, cost-effective SO8 or SO16 pack...

Power
6th June 2018
Range of transducer’s dedicated to leakage current in PV inverters

  The LDSR model from LEM announced at PCIM 2018, is a low cost and lightweight (25g) component, with a reduced footprint. The LDSR is dedicated to measuring the leakage current of 300mA nominal up to 900mA peak at 2KHz frequency.

Power
6th June 2018
Open loop current transducers feature 10MHz clock frequency

  At this year's PCIM show, LEM has announced the completion of its 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.

Test & Measurement
5th June 2018
Making the voltage measurement more compact

The new DVC 1000-P model for insulated nominal voltage measurements in traction and industrial applications has been announced by LEM. This device measures a nominal voltage of 1000 VRMS and incorporates isolating amplifier technology.  Despite achieving very high levels of isolation with a safety insulation voltage of 4.2kV, the DVC 1000-P transducer is really compact, measuring only 37x43x23.5mm and can be mounted on printed board for a to...

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