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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site circuit breaker A device used to interrupt or break an electrical circuit when an overload condition exists and so to protect electrical equipment. A circuit breaker is usually installed in the positive circuit. Related categories    • ELECTRICITY GENERATION AND SUPPLY Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP