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.

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 voltage sensing device includes: a multiplexer configured to choose either two corresponding voltages at two voltage sensing target nodes or two corresponding voltages at the terminals of a shunt resistor, and output either the two corresponding voltages at the two voltage sensing target nodes or the two corresponding voltages at the terminals of the shunt resistor, which are chosen by the multiplexer, as a first output voltage and a second output voltage; a differential switched capacitor amplifier circuit including a sampling capacitor and a feedback capacitor and configured to sample the first output voltage and the second output voltage through the sampling capacitor, and output sensing voltages corresponding to the first output voltage and the second output voltage by transferring a charge stored in the sampling capacitor through the feedback capacitor; and an operation control unit configured to control the multiplexer and the differential switched capacitor amplifier circuit.

A shunt resistor including a first terminal and a second terminal, each of the first terminal and the second terminal being made of a conductive metallic material and having a first plane, a second plane, and an outer periphery as side faces thereof. The first planes of the first terminal and the second terminal are opposite each other, and a resistive element is connected to the first planes so as to connect the first terminal and the second terminal. The joint area between the resistive element and each first plane is smaller than the area of the first plane. Each of the first terminal and the second terminal has formed therein a hole portion that penetrates therethrough from the first plane to the second plane.

Relative capacitance of a plurality of capacitive sensors may be monitored by using only one ADC conversion. A plurality of capacitive sensors individually charges a sample and hold capacitor. After all of the plurality of capacitive sensors have charged the sample and hold capacitor, a digital conversion of the resulting analog on the sample and hold capacitor is made and stored in a memory. This stored digital collective voltage is compared to a previously stored one and if different then a proximity/touch event may have occurred. Therefore, an entire panel of capacitive sensors may be quickly monitored for a change in the group capacitance thereof, or portions of the capacitive sensors may be monitored for a change in the subgroup capacitance thereof. By knowing which subgroup of capacitive sensors has changed its collective capacitive value, a more focused and selective capacitive sensor measurement can be made that uses less power.

A system for measuring an electrical quantity of a current circulating in an electrical device mounted on a mounting support, including an electrical power supply device, the device for measuring the current circulating in the device, the device for tapping the voltage at the terminals of the device, and the device for measuring this voltage, device for processing the measurement information, and device for communicating the measurement information to a receiver. This system includes a first main module, including the power supply device, the current and voltage measurement device, the processing device and the communication device, and a second auxiliary module, including the voltage tapping device and electrical connection device connecting with the main module, this connection making it possible to supply voltage to the main module and to measure the voltage recorded by the auxiliary module, the second module including electrical coupling device for connecting to the terminals of the device to be measured, these device being adapted to the configuration of these terminals.

A system for measuring an electrical quantity of a current circulating in an electrical device mounted on a mounting support, including an electrical power supply device, the device for measuring the current circulating in the device, the device for tapping the voltage at the terminals of the device, and the device for measuring this voltage, device for processing the measurement information, and device for communicating the measurement information to a receiver. This system includes a first main module, including the power supply device, the current and voltage measurement device, the processing device and the communication device, and a second auxiliary module, including the voltage tapping device and electrical connection device connecting with the main module, this connection making it possible to supply voltage to the main module and to measure the voltage recorded by the auxiliary module, the second module including electrical coupling device for connecting to the terminals of the device to be measured, these device being adapted to the configuration of these terminals.

To enable in a circuit arrangement (8) with a transformer with center tap the voltage measurement on the secondary side simply and safely, it is provided that at least two series-connected resistors (R3, R4) are connected between the two outer connections (A1, A2) of the secondary side of the transformer (T) to form a measurement point (P) between the two resistors (R3, R4), and a voltage measurement unit (V) is provided to measure the voltage (U.sub.P) between the measurement point (P) and the second output pole (13), which corresponds to the output voltage (U.sub.A).

A shunt resistor mounting structure comprising: a resistor including a pair of terminal portions and adapted to perform current sensing; and a mounting board. The mounting board includes: a mounting portion including a pair of a first land and a second land to which the pair of terminal portions are respectively connected, and which allow a current to be measured to flow through the resistor; a substrate having the pair of lands formed thereon; a first voltage terminal formed on the substrate and including a line pattern led out from the first land; and a second voltage terminal including a wire connected to the terminal portion corresponding to the second land.

An amplification device including: a switch including an output that is suitable for being connected to a first or a second input; a first branch that is connected to the first input, which applies a first gain to generate a first amplified signal; a second branch that is connected to the second input, which applies a second gain to generate a second amplified signal; a controller for controlling the switching of the switch to apply the first or the second amplified signal to the output, depending on whether or not the value of a predetermined quantity of the first amplified signal falls within a predetermined range. The first gain and the second gain being non-zero real numbers of opposite sign.