The invention relates generally to an Internet of Things (IoT) enabled wireless sensor system using attached and/or embedded passive electromagnetic sensors (PES) with distribution hardware. One embodiment of this invention includes a wireless sensor system, which permits process control and predictive maintenance on a utility's electrical transmission and distribution grid. Another embodiment includes a wireless sensor system, which permits process control and predictive maintenance of liquid or gas through a pipeline. Another embodiment includes a wireless sensor system, which permits measurement of breathable air pollutants. Furthermore, a method of manufacturing a protective passive electromagnetic sensor pod and passive electromagnetic sensor equipped distribution hardware components is provided.

The invention relates generally to an Internet of Things (IoT) enabled wireless sensor system using attached and/or embedded passive electromagnetic sensors (PES) with distribution hardware. One embodiment of this invention includes a wireless sensor system, which permits process control and predictive maintenance on a utility's electrical transmission and distribution grid. Another embodiment includes a wireless sensor system, which permits process control and predictive maintenance of liquid or gas through a pipeline. Another embodiment includes a wireless sensor system, which permits measurement of breathable air pollutants. Furthermore, a method of manufacturing a protective passive electromagnetic sensor pod and passive electromagnetic sensor equipped distribution hardware components is provided.

A non-contact voltage and ground detector allows a user to easily analyze the ground or neutral port of an electrical component. The detector includes a tubular body, a metal probe, a power source, a ground-and-neutral detector mechanism, and a non-contact voltage device. The metal probe is concentrically and terminally mounted to the tubular body and acts as the physical engaging element. The power source provides the electrical energy for the detector and is mounted within the tubular body. The ground-and-neutral detector mechanism in conjunction with the metal probe set up an open circuit. The ground-and-neutral detector registers the quality of a ground or neutral when the metal probe with an external electrical element. The non-contact voltage device measures changes in magnetic fields about an electrical component to identify the presence of voltage within the electrical component.

The disclosure relates to a connector arrangement having a first connector part and a second connector part, the second connector part being in the form of a receiving connector part having a receiver, and the receiver being connected to a first sensing device for sensing the signal received by the receiver. The connector arrangement is characterized in that the first connector part is in the form of a transmitting connector part that has a transmitter for the contactless transmission of a signal.

A current monitor for a transmission line having powered active components is provided. A current monitor includes: a housing configured to be coupled to a transmission line, an inductive current sensor in the housing configured to measure a value of the current on the transmission line to generate a sensor signal, a power source, and a sensor signal conversion circuit in the housing configured to receive power from the power source and to generate a current output signal based on the sensor signal, the current output signal having a natively useful form.

Provided are a voltage measurement method and apparatus. The method includes following steps: a number j of height values are selected in a vertical direction of a transmission line, a number m of sensors used for measuring, according to a Stark effect, electric field strength of a corresponding spatial position are arranged in sequence at each of j spatial positions of the j heights from the ground, electric field strength values of the corresponding spatial position are measured through the m sensors respectively, and an electric field strength average value of the corresponding spatial position is calculated according to the acquired m electric field strength values, where j and m are positive integers, and the j spatial positions are below the transmission line; a voltage of the transmission line is calculated according to j electric field strength average values.

Electrical voltage detection circuit and methods for determining the presence or absence of voltage in electrical equipment. An isolated power supply provides power to one or more voltage detection devices configured to detect voltage on one or more busses of electrical equipment. A switch is configured to provide supply voltage from the isolated power supply to the one or more busses of electrical equipment when the switch is closed. The voltage detection devices may determine if the one or more busses of electrical equipment are de-energized by detecting the voltage on the busses when the switch is open. The integrity of the electrical equipment may be verified by detecting, with the voltage detection devices, the voltage on the busses when the switch is closed, where the expected voltage readings are based on voltages being provided to one or more busses by the isolated power supply.

A switch failure detection device includes switches provided on branch paths, current detection units provided on the branch paths, the current detection units being to output current detection signal, a storage unit to store an initial value of the current detection signal, the initial value being to be output from the current detection units, a switch control unit to turn off one of the plurality of switches one by one with at least another one of the plurality of switches being turned on and a first failure detection unit to compare the initial value and a value of a first current detection signal output from corresponding one of the current detection units when the one of the switches is turned off, the first failure detection unit being to detect a first failure of the plurality of switches based on a result of the comparison.

A circuit for measurement of a voltage comprises a passive sensing element configured to be coupled between a measurement point and a reference point. The passive sensing element has a voltage-dependent impedance. Further, the circuit comprises an impedance detector and a reference circuit. The impedance detector is configured to detect the impedance of the passive sensing element by providing a probe signal to the passive sensing element and evaluating a response to the probe signal from the passive sensing element and a reference response from the reference circuit. Further, the circuit comprises a converter circuit configured to convert a result of evaluating the response and the reference response to a voltage level information.

A system and a method for correcting a current value of a shunt resistor, which calculate a change amount of a resistance value by using a variable temperature value of a shunt resistor and calculate a real-time current value flowing in the corresponding shunt resistor based on the calculated change amount of the resistance value and voltage values of both terminals of the shunt resistor, so that even though the temperature value of the shunt resistor is continuously changed, an accurate current value may be obtained by reflecting all the changes.