Electrical measurement technology specialist LEM is building on its experience in electrical measurement, energy metering and metrology to launch a new series of DC meters.
With the introduction of the DCES600 and DCES1500, LEM enables DC charging infrastructure manufacturers to accelerate time-to-market for both fast and megawatt charging solutions, with kilowatt-hour (kWh) billing services. The new meters offer enhanced performance, flexibility and system optimisation, making them particularly well-suited for applications such as e-truck charging.
The DCES600 and DCES1500 meters address a broad range of DC current-sensing requirements. They are designed to achieve class B accuracy at charger level with currents of up to 1500A, at operating temperatures from –40°C to +85°C without derating. Their high accuracy is maintained across the entire current range, ensuring precise measurements throughout the full charging cycle, from high currents at the start to low currents near completion.
The new meters comply with international legal metrology certifications and calibration standards, ensuring accuracy and traceability for kWh billing and regulatory compliance in EV charging applications. This, combined with the full-cycle sensing accuracy discussed above, is important when charging electric trucks, where the cost of transportation directly depends on the precise reporting of the amount of energy delivered during charging.
Designers can access the DCES meters over an RS485 communication interface that provides cybersecurity features.
The DCES meters are available with an optional remote display unit (RDU) which gives OEMs and systems integrators greater flexibility in the design of the human/machine interface compared to solutions with an integrated display.
Both DCES meters have a robust mechanical design with a glass-fibre reinforced case, which offers insulation resistance at up to 1000V DC for the DCES600 and up to 1500V DC for the DCES1500. They also off er large power terminals with large current contact areas.
The DCES meters off er real-time reporting of voltage, current, temperature and energy. Availability: LEM is now in the process of the certification of the DCES series by the end of the year. Samples are available now to enable developers to start work on charger integration and certification.
