Scope of application
The GM5FB series selective protection molded case DC circuit breaker is one of the new circuit breakers developed by our factory using internationally leading design and manufacturing technology, with independent intellectual property rights, and based on our factory's higher than international and national standards. Its rated working voltage is DC250V, suitable for infrequent switching and starting in circuits with DC rated current of 63-800A. Circuit breakers have overload and short-circuit short delay protection functions, which can protect distribution lines and power equipment from damage. Its short-circuit short delay has the inverse time characteristic of a fuse, with good current limiting ability and delayed action function. If applied in the protection of important loads in the power system, it can prevent fault current from spreading and provide fully selective protection.  

meet the standard
IEC60947-1 GB14048.1 General Provisions
IEC60947-2 GB14048.2 Low Voltage Circuit Breakers
IEC60947-4 GB14048.4 Contactors and Motor Starters
IEC60947-5-1 GB14048.5 Electromechanical Control Circuit Electrical Appliances

Technical parameters of GM5FB series selective protection molded case DC circuit breaker