The foundations of CBI-electric: low voltage were established in 1949 as a joint venture with the Heinemann Electric Company in Trenton, New Jersey, USA. During 1986 Fuchs Electrical Industries was acquired and merged into a new company called Circuit Breaker Industries Ltd (CBI). CBI-electric: low voltage is a wholly owned company of Reunert Limited. Reunert focuses primarily on the fields of electronic and electrical engineering and is a privately owned company listed on the Johannesburg Stock Exchange.

With an exciting background of South African pioneering achievements, Circuit Breaker Industries has prospered for more than five decades to become a leader in the design and manufacture of circuit breakers for equipment (hydraulic-magnetic), miniature circuit breakers (hydraulic-magnetic), residual current devices (RCD's), moulded case circuit breakers (thermal-magnetic) and metering products for electrical applications in supply authorities / utilities, mining, original equipment manufacturers, industrial sectors and millions of households.

CBI QZ Series Low Voltage Circuit Breakers Circuit Breaker Industries (CBI) is one of the worlds leading manufacturers of hydraulic-magnetic circuit breakers. Their hydraulic-magnetic technology allows the breaker to operate independent of external temperature, therefore allowing engineers to more accurately protect their designs from overload situations. CBI's QZ series low voltage breakers utilize their hydraulic-magnetic technology and are available in single, double and triple pole configurations. The QZ series is UL-1077 recognized for use as a supplementary protection device in electronic appliances.    Featured Item Page View Datasheet  Buy Now

CBI has pioneered many circuit protection technologies, below are some technical papers explaining the many technologies that they have integrated into their circuit protection devices. Additional technical papers are also linked below explaining the different processes and limitations that are part of accurate circuit protection.