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What is the Masterpact UR Low Voltage breaker and is it compatible with DC operating voltages?

No, it is not. Masterpact UR is an ultra rapid opening breaker for AC networks (50/60 Hz) from 240 V to 690 V, covering the ratings up to 6000 A. As installed power increases, electrical distribution has to shift from a LV design to a MV design. A high short-circuit level can be a threat to the installation if not protected by high performance protection breakers. It is built based on our standard air circuit-breaker but it has been developed to allow much higher installed power with a LV design.
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