IEEE standard for preferred ratings, related requirements, and application recommendations for low-voltage AC (635 V and below) and DC (3200 V and below) power circuit breakers

This standard defines the preferred ratings for low-voltage ac (635 V and below) power circuit breakers, general purpose dc (325 V and below) power circuit breakers, heavy duty low- voltage dc (3200 V and below) power circuit breakers, and fused (integrally or non-integrally) low- voltage ac (600 V and below) power circuit breakers.