A control circuit is provided for a circuit interrupter that achieves an inverse-time characteristic for overcurrents that include instantaneous current levels higher than the interrupting capability of the circuit interrupter by synchronizing the operation of the circuit interrupter to ensure that circuit...http://www.google.es/patents/US4916573?utm_source=gb-gplus-sharePatente US4916573 - Control circuit for a circuit interrupter
