IEEE PC37.04/D3.1, Nov 2017 is a draft standard for ratings and requirements for AC high voltage circuit breakers with rated maximum voltage above 1000 V. It provides technical direction for defining performance and design expectations for equipment used in power systems where interruption, insulation, and rating coordination are critical. For engineers, purchasers, and test planners, IEEE PC37.04/D3.1, Nov 2017 helps clarify the baseline for comparing breaker capabilities and aligning specifications with high-voltage application needs.

Overview of IEEE PC37.04/D3.1, Nov 2017

This draft document addresses the rating framework and requirements associated with AC high voltage circuit breakers above 1000 V. In practical terms, it sits at the intersection of device design, electrical performance, and verification for components used in power, energy, and related industrial systems. IEEE PC37.04/D3.1, Nov 2017 is relevant when a project needs a clear technical basis for breaker ratings, operating characteristics, and compliance-oriented evaluation of high-voltage interrupting equipment.

Typical use cases

IEEE PC37.04/D3.1, Nov 2017 is typically used when specifying or evaluating high voltage AC circuit breakers for substations, utility switchgear, and other medium- to high-voltage power distribution installations. It may also support procurement and testing workflows where rated maximum voltage, interruption capability, and application suitability need to be checked against a defined technical standard. The document is most useful for teams working on equipment selection, system protection, and breaker acceptance criteria in power infrastructure settings.

Why it matters

Using a focused rating standard helps reduce ambiguity when comparing AC high voltage circuit breakers and setting expectations for performance. IEEE PC37.04/D3.1, Nov 2017 can support more consistent design reviews, procurement decisions, and test planning by tying requirements to a defined voltage class. That consistency matters in practice because breaker selection affects system reliability, safety margins, and compatibility with surrounding protection equipment. It also helps limit avoidable risk when specifying equipment for demanding electrical networks.

• AC high voltage circuit breaker ratings
• Rated maximum voltage above 1000 V
• Design and performance requirements
• Testing and compliance checks
• Utility and power system applications