A method and apparatus for discriminating between electric field sources. In one embodiment, the apparatus comprises a mobile detection system comprising a sensor probe for remotely measuring an electric field generated by an electric field source in a patrolled area; and a processor, coupled to the sensor probe, for processing data received from the sensor probe to generate a first field strength and at least a second field strength for determining whether the electric field source is potentially hazardous.

An electronic power connector including a contact and a contact core. The contact is configured to electrically connect a power supply to a load. The contact core is configured to receive the contact. The contact core includes a transformer winding configured to sense a current and a sensor slot configured to receive a sensor. In some embodiments, the sensor is configured to sense a temperature. In some embodiments, the sensor is configured to sense a voltage.

Disclosed herein are systems and methods of calculating and mitigating time delays for electric power system samples received by remote data acquisition unit (RDAU), digitized, and transmitted to a receiving intelligent electronic device (IED). The IED may calculate time delays for various RDAUs, and establish wait windows for certain protection operations based on the samples needed for the protection operation and the calculated time delays for the various RDAUs. The IED may detect and report system or time signal anomalies based on changes to the calculated time delays from particular RDAUs.

Disclosed herein are systems and methods of calculating and mitigating time delays for electric power system samples received by remote data acquisition unit (RDAU), digitized, and transmitted to a receiving intelligent electronic device (IED). The IED may calculate time delays for various RDAUs, and establish wait windows for certain protection operations based on the samples needed for the protection operation and the calculated time delays for the various RDAUs. The IED may detect and report system or time signal anomalies based on changes to the calculated time delays from particular RDAUs.

An electrical bushing is provided that includes a conductor, a conductive polymer screen, and an insulating body. The conductive polymer screen has a first region and a second region. The insulating body is molded over at least a portion of the conductor and is molded over the first region of the screen. The second region of the screen extends outward from the insulating body to define an exterior flange.

An electrical bushing is provided that includes a conductor, a conductive polymer screen, and an insulating body. The conductive polymer screen has a first region and a second region. The insulating body is molded over at least a portion of the conductor and is molded over the first region of the screen. The second region of the screen extends outward from the insulating body to define an exterior flange.

Disclosed is a device for detecting a phase loss in an output current in an inverter. The device includes: an output current detection unit for detecting two phases output currents from two signals output from two shunt-resistors connected to two phases legs respectively; an output current calculation unit for calculating an output current of one remaining phase using the detected two phases output currents; and an output phase loss detection unit configured for detecting an output phase loss when the calculated output current is within a current band corresponding to the output phase loss or when the calculated output current has a magnitude equal to and a sign opposite to one of the detected two phases output currents.

Disclosed is a device for detecting a phase loss in an output current in an inverter. The device includes: an output current detection unit for detecting two phases output currents from two signals output from two shunt-resistors connected to two phases legs respectively; an output current calculation unit for calculating an output current of one remaining phase using the detected two phases output currents; and an output phase loss detection unit configured for detecting an output phase loss when the calculated output current is within a current band corresponding to the output phase loss or when the calculated output current has a magnitude equal to and a sign opposite to one of the detected two phases output currents.

An energy transmission system comprising a pole, at least one wire, a sensing system coupled to the pole for monitoring pole temperature, dynamic pole loading, external impact on the pole, vibration of the pole, and wires that are downed, at least one line sensor coupled to the wire and at least one powered data integrator. The sensing system comprises at least one dynamic pole loading sensor and a three-dimensional accelerometer. The dynamic pole loading sensor can be coupled to the lower portion of the pole above ground level but not more than 10 feet above ground level. Optionally there are two dynamic pole loading sensors, the first sensor having a longitudinal axis parallel to a longitudinal axis of the pole, and the second sensor having a longitudinal axis perpendicular to the longitudinal axis of the pole.

An energy transmission system comprising a pole, at least one wire, a sensing system coupled to the pole for monitoring pole temperature, dynamic pole loading, external impact on the pole, vibration of the pole, and wires that are downed, at least one line sensor coupled to the wire and at least one powered data integrator. The sensing system comprises at least one dynamic pole loading sensor and a three-dimensional accelerometer. The dynamic pole loading sensor can be coupled to the lower portion of the pole above ground level but not more than 10 feet above ground level. Optionally there are two dynamic pole loading sensors, the first sensor having a longitudinal axis parallel to a longitudinal axis of the pole, and the second sensor having a longitudinal axis perpendicular to the longitudinal axis of the pole.