Discriminating circuit breaker protection system direct current power distribution systems

摘要: An improved discriminating circuit breaker system for use with an electrically grounded direct current power distribution system. A three-tier safeguard is provided to insure proper operation of the should a fault occur. The basic components include operated and control therefor. sends signal operate it depending on whether illegitimate load detected This detection process utilizes: pilot wire through which any flows; alternating (a.c) generator superimpose such transmission line; detector sense a.c. level produce if its value exceeds maximum level; voltage falls below minimum switch responsive signals in series activate opening when open or produced.