IEEE PC37.09-1999/Cor 1/D7.2, Nov 2006 is a corrigendum to IEEE C37.09-1999, addressing corrections related to power-system switchgear and circuit-breaker testing and rating practices. In the context of Power, Energy and Industry Applications, it helps clarify technical requirements that affect how equipment is specified, evaluated, and documented. This matters for engineers and purchasers who need consistent interpretation of the underlying standard and reduced risk of misapplied test or performance criteria.

IEEE PC37.09-1999/Cor 1/D7.2, Nov 2006 overview

This technical document serves as a correction to the base IEEE C37.09-1999 standard, so its role is to refine rather than replace the original requirements. It is relevant where circuit breakers, interruption performance, ratings, and related test methods must be understood with precision. For organizations working in power equipment engineering, IEEE PC37.09-1999/Cor 1/D7.2, Nov 2006 supports cleaner specification review and more reliable interpretation of compliance expectations.

Typical use cases

This corrigendum is commonly used when reviewing specifications for medium- and high-voltage switching equipment, especially circuit breakers and associated test documentation. It may be referenced during design checks, procurement reviews, laboratory testing, or technical submittals tied to power distribution and utility applications. Engineers and standards teams may consult IEEE PC37.09-1999/Cor 1/D7.2, Nov 2006 to confirm corrected wording before applying the underlying standard to equipment ratings or performance verification.

Why this standard matters

Small corrections in a standards document can have a real impact on interpretation, acceptance testing, and equipment selection. IEEE PC37.09-1999/Cor 1/D7.2, Nov 2006 helps reduce ambiguity around technical requirements associated with power apparatus, which supports more consistent compliance decisions and clearer communication between suppliers and users. In practice, that can lower the risk of specification errors, rework, and disputes during testing or procurement.

• Corrigendum to IEEE C37.09-1999
• Power equipment and circuit-breaker context
• Technical correction for ratings and testing
• Relevant to compliance and specification review
• English-language standards document