IEEE C37.04-2018/Cor 1-2021

This corrigendum will address the following errors in C37.04-2018. - The scope of the published document does not match the scope of the PAR which created the document. Correct “rated nominal voltage” to “rated maximum voltage” to match original PAR and usage of terminology applied in other switchgear committee documents. - Correct references and terms used by both C37.04 and C37.09 so they are identical. - Clause 5.9 and 5.9.1 headers have identical text, modify to make clear the hierarchy. - Clause 4.1.2 is missing text required for clear meaning. - Other minor typographical or grammatical errors.



Corrigendum Standard - Active. This standard covers the rating structure for all high-voltage circuit breakers, which include all voltage ratings above 1000 V ac and comprise both indoor and outdoor types. Preferred ratings are also provided. Typical circuit breakers covered by these standards have maximum voltage ratings ranging from 4.76 kV through 800 kV, and continuous current ratings of 600 A, 1200 A, 2000 A, 3000 A, and 4000 A associated with the various maximum voltage ratings. The rating structure establishes the basis for all assigned ratings, including continuous current, insulation capability (formerly dielectric withstand voltages), short-circuit current, transient recovery voltage, and capacitor switching, plus associated capabilities such as mechanical endurance, load current, and out-of-phase switching. This standard does not cover generator circuit breakers, which are covered by IEC/IEEE Std 62271-37-013(TM).