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Are BL/BQ/BQD breakers affected by high ambient temperatures? - Publish Sandy Articles
Sandy FAQ

Are BL/BQ/BQD breakers affected by high ambient temperatures?


Yes. Thermal magnetic breakers use a set of bimetallic breakaway contacts to trip the breaker which are susceptible to high heat environments in which the current carrying capacity must be de-rated.

A de-rating chart can be found in the SpeedFax Catalog in the Unusual Operating Conditions section.

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