IEEE PC37.04/D6.1, Sep 2018 is an approved draft standard for ratings and requirements for AC high voltage circuit breakers with rated maximum voltage above 1000 V. It provides a technical reference for defining breaker performance, electrical limits, and related design expectations in high-voltage power systems. For engineers, buyers, and compliance teams, IEEE PC37.04/D6.1, Sep 2018 helps support consistent specification, testing, and selection of equipment used where interruption performance and insulation coordination are critical.

Overview of IEEE PC37.04/D6.1, Sep 2018

This standard focuses on the rating and requirement framework for AC high voltage circuit breakers, especially where the maximum voltage exceeds 1000 V. It is relevant to power, energy, and industrial applications that depend on dependable switching and fault interruption. IEEE PC37.04/D6.1, Sep 2018 is useful as a technical document for understanding how breaker capabilities are described and evaluated, with attention to electrical performance, operating limits, and the requirements that guide equipment conformity.

Typical use cases

IEEE PC37.04/D6.1, Sep 2018 is commonly used when specifying or reviewing high voltage AC circuit breakers for substations, utility switchgear, industrial distribution systems, and other medium- to high-voltage installations. It can support engineering teams during equipment selection, procurement, and acceptance testing when consistent ratings and requirements are needed. The standard is also relevant for manufacturers and integrators working with circuit breaker design, system coordination, and high-voltage protection planning.

Why it matters

Clear breaker ratings and requirements help reduce ambiguity in design and procurement, especially for equipment operating above 1000 V. IEEE PC37.04/D6.1, Sep 2018 supports safer and more consistent decisions by aligning expectations for performance, interruption capability, and electrical limits. That matters in practice because high-voltage circuit breakers must be matched to system conditions, insulation needs, and fault duty. Using the standard can also improve compliance checks and lower the risk of specification mismatches.

• AC high voltage circuit breaker ratings
• Maximum voltage above 1000 V
• Design and performance requirements
• Testing and compliance reference
• Utility and industrial power applications