Dual Rated AC/DC Circuit Breakers
Direct Current (dc-rated) Circuit Breakers
Standard dual-rated ac/dc circuit breakers may be used in dc system applications and will provide thermal (overload) protection as shown on the ac time-current characteristics curve. These circuit breakers are CSA / UL Listed for application in dc systems using the instantaneous trip multiplier for the ac time-current characteristic curve. Standard ac/dc circuit breakers may be used on grounded or ungrounded dc systems.
- QO/QOB – Available with dc voltage ratings from 48 Vdc to 125 Vdc.
- QOU – Available with dc voltage ratings from 48 Vdc to 125 Vdc
- FA and LA – Available with dc voltage ratings from 125 Vdc to 250 Vdc
- PowerPact H- and J-frame – UL/CSA labeled for applications up to 250 Vdc
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