IEEE C37.14-2025

This standard covers the following types, preferred ratings, and testing requirements of enclosed dc power circuit breakers:

The purpose of this document is to:

Revision Standard - Active. Enclosed low-voltage dc power circuit breakers of the stationary-mounted or drawout-mounted type of one- or two-pole construction with one or more rated maximum voltages of 300 V, 325 V, 600 V, 800 V, 1000 V, 1200 V, 1600 V, or 3200 V for applications on dc systems having nominal voltages of 250 V, 275 V, 500 V, 750 V, 850 V, 1000 V, 1500 V, or 3000 V, with general-purpose, high-speed, semi-high-speed, and rectifier circuit breakers; manually or power-operated; and with or without electromechanical or electronic trip devices are covered in this standard. Service conditions, ratings, functional components, temperature limitations and classification of insulating materials, dielectric withstand voltage requirements, test procedures, and application are dealt with in this standard.