PREFERRED RATINGS, RELATED REQUIREMENTS, AND APPLICATION RECOMMENDATIONS FOR LOW-VOLTAGE AC (635 V AND BELOW) AND DC (3200 V AND BELOW) POWER CIRCUIT BREAKERS
Institute of Electrical & Electronics Engineers
1 Overview
1.1 Scope
1.2 Purpose
2 Normative references
3 Preferred ratings for ac low-voltage power circuit breaker frames
3.1 General
3.2 Rated maximum voltage
3.3 Rated power frequency
3.4 Frame size
3.5 Rated continuous current
3.6 Short-circuit current and short-time rating
3.7 Power frequency withstand voltage
3.8 Overload and endurance
4 Preferred ratings for dc power circuit breakers
5 Preferred trip system current ratings and settings
5.1 Electronic trip system current ratings for ac power
circuit breakers
5.2 Electromechanical trip device current ratings for ac
power circuit breakers
5.3 Electromechanical trip device current ratings for
general purpose dc power circuit breakers
6 Preferred rated control voltages
Annex A (normative) Operating conditions
Annex B (informative) Bibliography
Presents the preferred ratings for low-voltage ac (635 V and below) power circuit breakers, fused low-voltage ac (600 V and below) power circuit breakers, general purpose dc (325 V and below) power circuit breakers, and low-voltage dc (3200 V and below) power circuit breakers.
| Document Type | Standard |
| Status | Current |
| Publisher | Institute of Electrical & Electronics Engineers |
| Supersedes |
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