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IEEE STANDARD

C37.04-1999 - IEEE Standard Rating Structure for AC High-Voltage Circuit Breakers

Description: 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 having the preferred ratings as listed in ANSI C37.06-1997. 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, and 3000 A associated with the various maximum voltage ratings. The rating structure establishes the basis for all assigned ratings, including continuous current, 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.
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