| 摘要 |
<p>An electric power distribution system, comprising a plurality of automatic protection circuit breakers (10, 11, ...; 20, 21, ...) distributed on various levels; each circuit breaker comprises an electronic protection unit (15) which opens the circuit breaker. There are also provided means (17, 18, 19; 27, 28, 29) for mutually connecting the circuit breakers in order to exchange information concerning their open or closed state. Opening of the circuit breaker depends on the values of the current (i(t)) flowing in the circuit breaker and of its derivative (di(t)/dt). The method for controlling the intervention sequence of the mutually interlocked circuit breakers (10, 11, ...; 20, 21, ...) entails that when one circuit breaker detects a fault condition, it reports it to the next higher-level circuit breaker, blocking its opening action, and in that said higher-level circuit breaker, when detecting a fault condition, reports this information to the upstream circuit breaker, if provided, blocking its opening action. <IMAGE></p> |
