This invention is referred to a guarantee seal for non-opening electrical energy consumption meters with mechanical seal type padlock, disposable of a single use; for sealing or closing some container, box, door, cabinet, meter, valve, pump, bag, carrier bag, water tank, etc., meanly used for the electricity meters commonly used in countries of North America, Central and South America; whose purpose is protecting and controlling the electricity theft, guarantying its immobility.

Such guarantee seal has a unique shape that fits exactly with the cavities of the meters and it gets in by pressure, therefore if the seal is located outside of such cavity its external manipulation is evident, furthermore, it has a lid, a base, a verification system by continuity and tag or RFID tag to ensure the integrity of such seal.

A probe is adapted to send a signal over a selected circuit and to provide circuit information. One or more modules have a connector for electrically connecting to an outlet, logic interconnected with the connector for detecting the signal and receiving the circuit information, and an indicator interconnected with the logic for presenting the circuit information in response to the signal. A computer is operably associated with the probe and configured to execute a program of instructions to provide a breaker box representation and an electronic record of one or more rooms showing outlet symbols that identify the location of outlets. The computer is configured to execute the program of instructions to collect the circuit information from the one or more modules and to associate the circuit information with a corresponding breaker on the breaker box representation and on outlet symbols on the electronic record of one or more rooms.

A device comprises a multiplication circuit configured to derive a product of a first signal S.sub.1 and a second signal S.sub.2, S.sub.2 having a phase difference relative to the first signal S.sub.1, a low pass filter configured to remove a selected frequency component from the product of S.sub.1 and S.sub.2 to derive a dot product S.sub.1S.sub.2; and a calculation circuit configured to receive the dot product S.sub.1S.sub.2 and generate a signal output having a ratio |S.sub.1|/|S.sub.2| and the phase difference .

The testing and operating of remote devices are discussed. More particularly, signals are generated and/or received by remote devices, analyzed, logged, and displayed. Signals to remote devices are provided. Enhancements to the operability, capabilities, and functionality of such previously available testing equipment, are provided, via the operation of a remote, portable, and lightweight test bed. The test bed is operated and controlled remotely via a user-computing device. The test bed senses, probes, and/or controls a remote device and test data is automatically generated and/or acquired. The test data is provided to the user-computing device for automated analysis, visualization, and test report generation.

The testing and operating of remote devices are discussed. More particularly, signals are generated and/or received by remote devices, analyzed, logged, and displayed. Signals to remote devices are provided. Enhancements to the operability, capabilities, and functionality of such previously available testing equipment, are provided, via the operation of a remote, portable, and lightweight test bed. The test bed is operated and controlled remotely via a user-computing device. The test bed senses, probes, and/or controls a remote device and test data is automatically generated and/or acquired. The test data is provided to the user-computing device for automated analysis, visualization, and test report generation.

Systems, methods, and apparatuses for measuring capacitance of a load. The method includes applying, via a conductor, a time-varying voltage signal with a DC offset to the load. At least a portion of the conductor is shielded with a shield and the time-varying voltage signal is applied to the shield. The conductor is coupled to the load and one or more power-related parameters of the conductor are monitored to monitor the capacitance of the load.

Systems, methods, and apparatuses for measuring capacitance of a load. The method includes applying, via a conductor, a time-varying voltage signal with a DC offset to the load. At least a portion of the conductor is shielded with a shield and the time-varying voltage signal is applied to the shield. The conductor is coupled to the load and one or more power-related parameters of the conductor are monitored to monitor the capacitance of the load.

A current detector that can provide redundancy has a bus bar through which a current to be measured flows from a right side surface toward a left side surface. A shunt resistor and a magnetic sensor which detect the current by different detection methods are provided on a path of the bus bar through which the current flows. The shunt resistor allows the current flowing through the bus bar to flow through a resistive element and detects the magnitude of the current from a voltage across the resistive element. The magnetic sensor detects a magnetic-field component generated by the current flowing through the bus bar.

Systems, apparatus, and methods that provide a flexible current sensor capable of measuring current flowing through a conductor without contacting the conductor. In various implementations, a flexible current sensor may have a comparable size, shape, and appearance as a flexible loop of a Rogowski coil, except the current sensor described herein can sense direct current (DC). The current sensors of the present disclosure utilize a novel open loop degaussing mechanism to provide accurate DC current measurements in a conductor. To achieve this, a current sensor includes an AC degaussing coil wrapped around a magnetic core. A driver circuit drives an AC degaussing signal in the AC degaussing core, which operates to reset or degauss the magnetic core, thereby providing more accurate current measurements.

Provided is a resistor including a first electrode, a second electrode, and a resistive element disposed between the first and second electrodes. Each of the first and second electrodes includes a main electrode portion and a narrow electrode portion with a narrower width than that of the main electrode portion. The resistive element is disposed between the two narrow electrode portions.