Thursday, July 18, 2024

Advanced RCM Line For Safe EV Charging

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Littelfuse has introduced a cutting-edge Residual Current Monitor (RCM) line, providing comprehensive protection and enhancing safety in electric vehicle (EV) charging installations.

Littlefuse RCM line

Littelfuse, Inc., an industrial technology manufacturing company, has launched its Western Automation Research and Development Residual Current Monitor (RCM) product line, which the company claims to detect AC and DC ground fault currents in electric vehicle (EV) charging installations. In a residual fault current, the RCM emits an output signal that activates a relay or contactor, cutting off the power supply and eliminating the risk of electric shock during EV charging. The RCM product line comprises a range of models that comply with the global UL and IEC safety standards for EV charging applications. These products can identify AC, DC, or both faults in single-phase or multiphase installations.

The company claims that the product line offers a variety of models that comply with global AC electric vehicle (EV) charger safety standards. These models include Level 2 (UL2231-2), Mode 2 (IEC62752), and Mode 3 (IEC62955), ensuring comprehensive protection. The monitors are designed to detect AC and DC leakage currents, posing significant shock hazards. Additionally, the product line features single-phase and three-phase designs within a single component, streamlining inventory management. For enhanced flexibility, the monitors offer chassis and board-level mounting options.

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Some of the main features of the product include:

  • Operates from a 12V DC supply
  • • External Test Facility
  • JST XH 2.5mm Pitch Connector JST:B4B-XH-A (LF)(SN)
  • • “Fault” signal output.
  • LED Indication for “On” and “Fault”
  • • For use with single or 3 phase loads
  • • ROHS compliant
  • 3000A Surge Current Withstand
  • • 14mm Aperture

“Electrical vehicles are a major priority for car manufacturers, and it is only a matter of time before EVs become a significant proportion of all vehicles—making it paramount that charging applications are safe and reliable,” stated Philippe Di Fulvio, Littelfuse EV Infrastructure Business Development Manager. “The RCM monitor detects AC and DC ground fault currents and quickly triggers a fault output to disable the charging current and remove the shock hazard when charging vehicles.”

Nidhi Agarwal
Nidhi Agarwal
Nidhi Agarwal is a journalist at EFY. She is an Electronics and Communication Engineer with over five years of academic experience. Her expertise lies in working with development boards and IoT cloud. She enjoys writing as it enables her to share her knowledge and insights related to electronics, with like-minded techies.


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