LEM launches its first plug-and-play train energy meter

New Products |
By Nick Flaherty

LEM in Switzerland has launched its first plug-and-play solution for on-board train energy metering to take advantage of the shift to 4G wireless networks.

Energy management in railway applications involves an on-board energy measurement system (EMS) and ground-based data collecting system (DCS). These systems allow railway operating companies to manage energy cost for each train based on real, precise and controlled measurement under the regulation (EU) 2018/868 in Europe.

The TEMA4G supports the evolution of railway networks by combining LEM’s EM4TII+ on-board energy meter – already in service and proven in many trains – with an industrial modem offering 4G and GPS connectivity. Through its web interface the system allows users to access detailed load profiles, as well as numerous system parameters.

It aims to take advantage of the switch over to new telecommunications networks. Its communication functionalities make it possible to transition smoothly and efficiently in favour of 4G networks after 2G networks have been phased out.

The monitor is suitable for use in multi-system AC or DC vehicles to interface and process measurement signals from current and voltage sensors and generates energy measurement and associated load profiles. Profiles are recorded in datasets with a five-minute interval (different intervals available in the product’s settings), containing the date, time, any events, as well as location co-ordinates. The measured energy datasets are stored in the instrument in consumption profiles for 300 days.

TEMA4G’s analog-to-digital converters provide ultra-precise energy measurement (class 0.5 R) and guarantee excellent long-term stability, in any in-field conditions.

It operates across a wide temperature range from -40°C to +85°C, and compliant with EN 50463:2017 and enables the measurement and transmission of energy billing data (CEBD) – timestamped and localised – to ground data collection systems.

Meeting every vibration, shock, fire protection, and electromagnetic compatibility railway standard, TEMA4G is suitable for new projects such as large retrofit programmes and supports railway operating companies of all sizes in a transition towards better energy monitoring, management and optimisation.

Additional features include four input channels offering multiple configurations via the unit’s Ethernet port and data exchange security. This versatility makes it possible to adapt the solution to each train, and to the needs of each project.

“TEMA4G is the answer to the growing need for better energy management and optimisation in the rail transport sector. Given the importance of improving the efficiency of electrical systems, innovative solutions must be developed. LEM has once again demonstrated its ability to meet the challenges of energy management in the railway sector by developing a turnkey energy metering solution on-board trains,” said Florent Balboni, LEM Global Product Manager for energy metering solutions. 

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