Detection circuitry for an integrated circuit (IC) includes voltage divider circuitry, comparison circuitry, and calibration circuitry. The voltage divider circuitry receives a power supply signal and output a first reference voltage signal and a supply voltage signal based on the power supply signal. The comparison circuitry compares the first reference voltage signal and the supply voltage signal to generate an output signal. The calibration circuitry alters one or more parameters of the voltage divider circuitry to increase a voltage value of the supply voltage signal based on the comparison of the first reference voltage signal with the supply voltage signal.

One or more embodiments relate to a switch-mode power supply control circuit that can be used to provide power to regular single phase or three phase energy meter, while also offering a simple low cost method to detect a magnetic tampering event that usually occurs on energy meter. In one example, the switch-mode power supply for the energy meter is a flyback type switch mode power supply comprising a power switch, a switching controller, and a slew rate based magnetic field detection circuit which is configured to enable a magnetic tampering detection signal that can be communicated to the switching controller. Upon detection of a magnetic tampering event, the power supply and the supporting circuitry can raise the switching frequency of the power switch in order to provide more power to the output or cutoff power to the consumer's power outlet and even report the tampering event to the power station.

An electronic electricity meter (102) for monitoring electrical power consumption due to a plurality of loads, comprising electric power sensor (506A, 506, 502, 504, 508) configured to register, optionally in a substantially real-time fashion, data indicative of aggregate power demand (202) of a number of loads coupled to a common electrical power source, such as one or more phases of a polyphase system, load tracker (506B, 506, 502, 504) configured to detect the effect of individual loads on the basis of distinctive load patterns in said data, wherein the tracker is configured to utilize a distinctive load pattern detected in said data as at least a basis for a reference pattern (304, 306, 308) for subsequent detections (304a, 306a, 308a) of the effect of the same load in the data, accuracy analyzer (506C, 506, 502, 504) configured to, on the basis of comparisons of subsequent detections with the corresponding references, determine (312, 314, 316) whether the comparisons relating to at least two, preferably three, loads each indicate the difference between the subsequently detected pattern and the corresponding reference exceeding a predetermined threshold, and notifier (506D, 506, 502, 504, 508) configured to send, provided that positive determination has taken place (318), a notification signal indicative of potential fault with the electricity meter towards an external entity (106, 108). Corresponding arrangement and method are presented.

An enclosure assembly includes a first enclosure portion and a second enclosure portion which in a fully assembled state of the enclosure assembly enclose at least a part of an inner space for accommodating a metering device; and a fixation arrangement for affixing the first enclosure portion to the second enclosure portion in the fully assembled state, wherein the fixation arrangement in a fixation position prevents the first enclosure portion and the second enclosure portion from being separated from each other. The fixation arrangement includes at least one latching element arranged at the first enclosure portion and at least one counter latching element arranged at the second enclosure portion. In the fixation position, the at least one latching element is in engagement with the at least one counter latching element, and a blocking element prevents a disengagement of the at least one latching element and the at least one counter latching element.

A meter case used with a utility meter is disclosed. The meter shell includes a plurality of snap fit joints assembled on the meter case arranged to engage a module cover to mount the module cover to the meter shell. The module cover further includes wire housing formed along an inner periphery of the module cover that houses a wire having a first end and a second end therein. A metal shield placed behind the meter shell is electrically coupled to a first connector. A terminal electrically connected to the metal shield is arranged to discharge current to ground. An electrical contact electrically coupled to the second end of the wire is arranged to engage the first connector to establish an electrical connection to the metal shield for the discharge to ground of electrostatic currents sensed by wire.

Techniques for identifying electrical theft are described herein. In an example, a secondary voltage of a transformer may be inferred by repeated voltage and current measurement at each meter associated with the transformer. A difference in measured voltage values, divided by a difference in measured current values, estimates impedance at the meter. The calculated impedance, together with measured voltage and current values, determine a voltage at the transformer secondary. Such voltages calculated by each meter associated with a transformer may be averaged, to indicate the transformer secondary voltage. A transformer having lower-than-expected secondary voltage is identified, based in part on comparison to the secondary voltages of other transformers. Each meter associated with the identified transformer may be evaluated to determine if the unexpected voltage is due to a load on the transformer. If a load did not result in the unexpected secondary voltage, power diversion may be reported.

Techniques for identifying electrical theft are described herein. In an example, a secondary voltage of a transformer may be inferred by repeated voltage and current measurement at each meter associated with the transformer. A difference in measured voltage values, divided by a difference in measured current values, estimates impedance at the meter. The calculated impedance, together with measured voltage and current values, determine a voltage at the transformer secondary. Such voltages calculated by each meter associated with a transformer may be averaged, to indicate the transformer secondary voltage. A transformer having lower-than-expected secondary voltage is identified, based in part on comparison to the secondary voltages of other transformers. Each meter associated with the identified transformer may be evaluated to determine if the unexpected voltage is due to a load on the transformer. If a load did not result in the unexpected secondary voltage, power diversion may be reported.

A control device configured to communicate with a first projector which projects a first image in a first projection area, and a second projector which projects a second image in a second projection area having a first overlap area overlapping the first projection area to make the first projector and the second projector perform an edge blending process includes a reception section for receiving input of designation information including a direction in which an overlap width, a generation section for generating first overlap information including information representing first side in the first overlap area and information representing the overlap width of the first overlap area, and second overlap information including information representing second side in the first overlap area and the information, and a transmission section for transmitting the first overlap information to the first projector, and the second overlap information to the second projector.

A control device configured to communicate with a first projector which projects a first image in a first projection area, and a second projector which projects a second image in a second projection area having a first overlap area overlapping the first projection area to make the first projector and the second projector perform an edge blending process includes a reception section for receiving input of designation information including a direction in which an overlap width, a generation section for generating first overlap information including information representing first side in the first overlap area and information representing the overlap width of the first overlap area, and second overlap information including information representing second side in the first overlap area and the information, and a transmission section for transmitting the first overlap information to the first projector, and the second overlap information to the second projector.

This disclosure relates to a method and apparatuses for detecting and reporting suspected tampering of an energy meter to a utility. The method and apparatus uses a plurality of sensors to obtain data relating to one or more input parameters based on the type of input signal. The input parameters are mapped with a tamper type to provide a classification of one or more output parameters. The output parameters are compared to one or more operating conditions of the energy meter to identify one or more suspected tampers. Any suspected tampers are reported to the utility.