초록 ▼

In a utility power distribution system having at least one primary electric power source and at least one secondary electric power source, each of said primary and secondary sources being connected to the distribution system through respective controllable circuit breakers, the improvement comprisin

In a utility power distribution system having at least one primary electric power source and at least one secondary electric power source, each of said primary and secondary sources being connected to the distribution system through respective controllable circuit breakers, the improvement comprising communication signal generating apparatus arranged for introducing a communication signal into the power distribution system from the connection of the primary power source, communication signal receiving apparatus arranged for receiving the communication signal via the power distribution system at the secondary power source, and apparatus responsive to the interruption of receipt of the communication signal at the receiving apparatus for operating the circuit breakers at the secondary power source for disconnecting the secondary power source from the power distribution system.

대표청구항 ▼

1. In a utility power distribution system having at least one primary electric power source and at least one auxiliary electric power source, each of said primary and auxiliary sources being connected to the distribution system through respective controllable circuit breakers, the improvement compri

1. In a utility power distribution system having at least one primary electric power source and at least one auxiliary electric power source, each of said primary and auxiliary sources being connected to the distribution system through respective controllable circuit breakers, the improvement comprising:communication signal generating apparatus arranged for introducing a communication signal into the power distribution system from the connection of the primary power source; communication signal receiving apparatus arranged for receiving the communication signal via the power distribution system at the auxiliary power source; and apparatus responsive to the interruption of receipt of the communication signal at the receiving apparatus for operating the circuit breakers at the auxiliary power source for disconnecting the auxiliary power source from the power distribution system. 2. The improvement of claim 1 wherein the communication signal generating apparatus and the communication signal receiving apparatus are arranged for introducing and receiving, respectively, a unique communication signal for each phase of power.3. The improvement of claim 1 further comprising a portable control signal receiver for at least one of detecting and identifying the communication signal at a plurality of locations between the communication generation apparatus and the communication receiving apparatus and other locations throughout the electric distribution system.