Abstract:
Provided are a connection error detecting apparatus and method. The connection error detecting apparatus, which detects connection errors for each rating of a smart meter, comprises: a parameter calculating unit for calculating connection error detecting parameters including an actual three-phase voltage value, an actual three-phase current value, an effective amount of three-phase power, and an ineffective amount of three-phase power; and a connection error determining unit for setting connection error criteria for detecting connection errors for each rating of the smart meter, and detecting the connection errors for each rating by determining whether or not any one of the connection error detecting parameters satisfies the connection error criteria.
Abstract:
A power meter for measuring power parameters on one or more electrical power lines/loads is configured to include a revenue class metering module and a power quality metering module. The revenue class metering module and the power quality metering module may use the same measured voltage and current signals to generate revenue accurate power consumption information and power quality information, respectively. The power meter may also include a plurality of filters configured to attenuate high frequency signals included in the voltage and current signals. Each of the filters may be configured with a corner frequency, gain and signal propagation delay that is substantially equal. The filtered current and voltage signals may be received and processed by the revenue class metering module, and the power quality metering module to generate revenue accurate power consumption information and power quality information, respectively. Alternatively, the filtered current and voltage signals may be received and processed by the power quality metering module to generate power quality information, and unfiltered current and voltage signals may be received and processed by the revenue class metering module to generate revenue accurate power consumption information.
Abstract:
Systems and methods for faster, safer and lower cost means of interconnecting local generation or power monitoring systems to a residential or commercial electric power system so that the connection is made via a direct connection to the power meter socket on the consumer side of the meter. The breaker for the system is collocated with the interconnection. Further modern energy management system typically require measurement of an entire premise's power and energy load, requiring additional power measurement probes and communications wiring. Instead of being connected to a new, upgraded breaker in the main service panel on the consumer side of the meter which often requires extensive and time consuming work to do as well as additional potential complications, embodiments of the invention may allow for a quick interconnection by inserting an attachment underneath the existing standardized meter for simplified power connection, measurement and communications.
Abstract:
A meter device for measuring electrical energy is provided. The meter device includes circuitry for measuring at least one parameter of electrical energy provided to the meter device. A storage device is provided for storing at least one calibration factor for compensating for errors associated with at least one of at least one external current transformer (CT) and at least one external potential transformer (PT) that operates on the electrical energy provided to the meter device. At least one processor is provided for processing the at least one calibration factor for adjusting the measuring for compensating for the errors when measuring the at least one parameter of electrical energy.
Abstract:
The present invention is a meter for recording voltage and current on a transformer. The device has a housing with a body portion and a lever portion, the lever portion being movable between a closed position wherein the lever portion abuts the body portion and an open position wherein the lever portion is positioned away from the body portion. The device includes a pair of current sensors each current sensor being divided into two corresponding sensor fractions with one fraction of each sensor formed on the body portion of the housing and the other corresponding fraction formed on the lever portion of the housing. The fractions of each sensors are constructed such that each of the current sensors have a central opening dimensioned to receive one of the transformer terminals when the lever portion of the housing is in its first position. The current sensors are positioned on the housing such that the meter can be mounted to the terminals of the transformer. The device also includes two voltage leads which can be attached to the transformers terminals. An instrumentation module is contained in the housing and is coupled to the current sensors and the voltage leads, the instrumentation module being adapted and configured to record voltage and current measurements from the current sensors and voltage leads. The instrumentation module includes a signal processing module for processing the voltage and current signals to provide other information such as energy and accumulated in-phase current 90 data. Finally, the device includes a communications module coupled to the instrumentation module for communicating the voltage and current measurements and the derived data to a remote user.
Abstract:
A method and apparatus measures electrical power usage and quality, while mitigating the effects of noise on measured signals or parameters. Specifically, a digital electrical power and energy meter employs a method in which a processor averages a parameter, such as voltage or current, over a plurality of cycles of a time-varying signal, such as an AC electrical signal. The method employed by the meter samples a parameter over the plurality of cycles and computes the average of the samples corresponding to the same phase angle of the signal to produce an average signal.
Abstract:
A meter device for measuring electrical energy is provided. The meter device includes circuitry for measuring at least one parameter of electrical energy provided to the meter device. A storage device is provided for storing at least one calibration factor for compensating for errors associated with at least one of at least one external current transformer (CT) and at least one external potential transformer (PT) that operates on the electrical energy provided to the meter device. At least one processor is provided for processing the at least one calibration factor for adjusting the measuring for compensating for the errors when measuring the at least one parameter of electrical energy.
Abstract:
A concealed pinhole camera assembly for video surveillance is described where the image sensor is mounted opposite a pinhole opening in the face plate for a wall plug or switch, mounted in turn on an electrical junction box. The pinhole opening is located in the position normally occupied by a mounting screw, thus concealing its location. An additional mounting mechanism may be utilized to secure the face plate and camera assembly to the junction box.
Abstract:
A system is described that enables the user to deal with an intrusion into their home without having to personally confront the intruder. Given the night-time nature of many intruder events, a display and control unit is disclosed that is suitable for residing on a bedside table, typically in the Master Bedroom, performing a remote viewing and control function. Various locations within the particular home are represented by buttons such that the user can easily choose the location(s) to be viewed and can verify, among other things, the presence of an intruder. Motion detection is various rooms may be included and viewing can be enhanced by lights controlled from this unit. User interface features are included that are simple to operate when the user is half-awake. Surveillance and control features may be combined with common bedside appliance functions including a clock-radio, a television, or a telephone.
Abstract:
An electric-information measurement/acquisition system comprising a sensor unit, a measurement unit, and an acquisition unit. The sensor unit includes sensors for detecting properties such as the voltage, current, temperature, and moisture,. The measurement unit includes: an A/D conversion unit for performing A/D conversion of the properties thus obtained at a predetermined first cycle; a first computing unit for performing computation at the predetermined first cycle and a predetermined second cycle so as to obtain intermediate data including the accumulated values of the averages of the properties including power-consumption data; and a transmission/reception unit for transmitting the intermediate data according to a request from the acquisition unit at a predetermined third cycle. The acquisition unit performs computation processing and correction processing for the intermediate data obtained from the multiple measurement units, thereby obtaining the properties thereof in a final format.