Abstract: Certain embodiments of the invention include systems, methods, and apparatus for locating faults on an electrical distribution network. According to an example embodiment of the invention, a method is provided for locating faults on an electrical distribution network. The method can include monitoring, by one or more smart meters, a plurality of voltage values associated with the electrical distribution network; and when one or more of the plurality of monitored voltage values are detected to be less than or equal to a predetermined voltage for a specified time: storing at least a portion of monitored line voltage values; indicating a detected fault by transmitting one or more messages from the one or more smart meters or line sensors to a central station receiver, and determining a fault location based at least in part on the one or more messages and a topological and electrical model of the electrical distribution network.

Abstract: Certain embodiments of the invention include systems, methods, and apparatus for locating faults on an electrical distribution network. According to an example embodiment of the invention, a method is provided for locating faults on an electrical distribution network. The method can include monitoring, by one or more smart meters, a plurality of voltage values associated with the electrical distribution network; and when one or more of the plurality of monitored voltage values are detected to be less than or equal to a predetermined voltage for a specified time: storing at least a portion of monitored line voltage values; indicating a detected fault by transmitting one or more messages from the one or more smart meters or line sensors to a central station receiver, and determining a fault location based at least in part on the one or more messages and a topological and electrical model of the electrical distribution network.

Abstract: The measurement of analog coil voltage and coil current during the energizing of the circuit breaker coil that is connected to the output contact of a protective circuit breaker relay in order to detect an incipient failure of the circuit breaker mechanism.

Abstract: The measurement of analog coil voltage and coil current during the energizing of the circuit breaker coil that is connected to the output contact of a protective circuit breaker relay in order to detect an incipient failure of the circuit breaker mechanism

Abstract: A phasor measurement system is provided for computing synchronized phasor measurements. The phasor measurement system includes acquisition circuitry for acquiring voltage or current values from a power line, sampling circuitry for sampling the voltage or current values, and processing circuitry for computing a phasor and at least one time derivative of the phasor based on the sampled voltage or current values and for computing a synchronized phasor value based on the phasor and the at least one time derivative of the phasor.