DPA Series 3-Phase Voltage Monitoring Relays

The Carlo Gavazzi DPA01, DPA51, and DPA52 3-phase monitoring relays are specifically designed for HVAC systems operating with low-GWP flammable refrigerants. The HVAC industry is undergoing a profound transformation. Manufacturers are phasing out high-GWP HFCs in favor of next-generation refrigerants such as R-32, R-1234yf, and R-290. While these alternatives support climate goals, they also present a higher ignition risk that is requiring strict compliance with IEC/EN 60335-2-40 and UL 60335-2-40 safety standards.

The DPA series relays provide a reliable and certified response to this challenge. Designed to operate completely spark-free, they meet the ignition-free requirements for A2L and A3 refrigerants. These relays make continuous phase sequence and phase loss monitoring, ensuring that compressors are always protected from the main grid failures.

This range supports manufacturers of commercial heat pumps, chillers, and rooftop units in meeting both regulatory requirements and growing users' expectations for safe, efficient, and sustainable HVAC solutions.