scope:

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

a) Stationary or drawout type of one- or two-pole functional construction

b) Having rated maximum voltages of up to 3200 V

c) Manually operated or power operated d) With or without overcurrent trip devices

NOTE-In this standard, the use of the term "circuit breaker" is considered to mean "enclosed dc power circuit breaker."¹

Purpose

The purpose of this document is to:

a) Establish minimum functional requirements

b) Establish preferred rating structure

c) Provide preferred ratings

d) Establish testing requirements

¹ Notes in text, tables, and figures of a standard are given for information only, and do not contain requirements needed to implement the standard.