The present invention includes a fault indicator (12) for an electrical transmission line (10) comprising: a fault indicator circuit; and a remote communicator operatively coupled to the fault indicator circuit to transmit condition data to a remote location (14), where such condition data includes current load data. The invention also includes a method of monitoring and responding to current faults and load variations across an electrical transmission network (16), the method comprising: insulating two fault indicators (12) in electrical communication with an electrical transmission network (16) and including two-way communication capability: generating, by the two fault directors (12), condition data specific to a respective location of each of the two fault indicators (12), where such condition data includes current load data; transmitting the condition data from the two fault indicators (12) to a remote location (18); receiving, at the remote location (18), the condition data transmitted from the two fault indicators (12); and, monitoring and processing the condition data received.

Transmission/distribution line fault indicator with remote polling and current sensing and reporting capability

Power quality detection, monitoring, reporting, recording and communication in a revenue accuracy electrical power meter is disclosed. Transient events are detected by monitoring the wave shape of the electrical power and comparing deviations to a known threshold. Sags and Swells are detected by computing root mean square value over a rolling window and comparing the computed value with a known threshold. Harmonic frequencies and symmetrical components are quantified by a known algorithm and compared with a known threshold. Incoming waveforms are stored to memory. All recorded and computed data is moved to non-volatile storage via direct memory access transfer in the event that a power quality event jeopardizes the operating power of the meter. Further, the meter provides a power supply utilizing high and low capacitive storage banks to supply sufficient energy to survive short duration power quality events which jeopardize the meter's operating power.

Revenue meter with power quality features

A system and method for transmitting data from a utility meter, such as a power meter, is disclosed. A microprocessor housed inside the power meter obtains readings of various power indicia, stores the readings in memory, and determines an efficient means of formatting the data for transmission to a remote host computer for further processing and use. The data is selectively compressed to minimize the amount and size of data that needs to be transmitted. The microprocessor is mounted on a circuit board assembly within the power meter housing and interfaces between the meter board of the power meter and a transmitter. The transmitter communicates the formatted and potentially compressed data from the power meter to the remote host computer wirelessly or via hard-wired communication lines. The various power indicia include power usage or power quality information.

System and methods for wirelessly transmitting data from a utility meter

A-base revenue meter with power quality features

An automatic meter reading (AMR) system and a method of operating an AMR system are disclosed. The AMR system stores and transfers consumptive data, demand data, and data archives. The system and method can also provide a demand reset to reduce or eliminate the need to physically visit a remote endpoint device, for example a residential utility meter, to directly connect to the endpoint device for the collection of data. The system and method provide two-way wireless communication between at least one reader and a plurality of remote endpoint devices and are adapted for use with mobile readers. The AMR system and method therefore provide efficient and reliable storage and transfer of data, including high volumes of data, at mobile read rates.

System and method for automatic meter reading with mobile configuration

An electrical utility meter includes measurement error diagnostic capabilities with intelligent communication capabilities. In an exemplary embodiment, the present invention includes an electrical utility meter for measuring energy consumption by a load. The electrical utility meter includes, sensor circuitry, a conversion circuit, a communication circuit, and a controller. The sensor circuitry connects to a meter socket. The meter socket connects to a plurality of power lines that, in turn, connect the load to a source of electrical power. The source of electrical power provides power to the load in a plurality of phases. The sensor circuitry generates voltage and current measurement signals representative of the voltage and current waveforms on the plurality of power lines. The conversion circuit is connected to the sensor circuitry and generates a power consumption measurement, as well as measured phase angle data for the plurality of phases, all of which are generated based on the voltage and current measurement signals. The communication circuit is connected to a remotely located control device. The controller is connected to the memory, the communication circuit, and the conversion circuit. The controller is operable to receive measured phase angle data for the plurality of phases, periodically perform a plurality of diagnostic tests using the measured phase angle data to determine whether a measurement error is present, and provide an alert signal to the communication circuit if a measurement error is present. The communication circuit, upon receiving the alert signal, is operable to obtain information identifying the measurement error and transmit an error signal containing information identifying the measurement error to remotely located control device.

Watt-hour meter with communication on diagnostic error detection

An electrical utility meter includes a controller that determines a list of highest demands using event-triggered windows of time to ensure that only one of the entries on the list corresponds to any one high consumption event. The controller generates a demand value corresponding to the quantity of energy consumed within a demand interval, and then determines whether the demand value for the demand interval is greater than a smallest demand value on a list of highest demands in a memory location. If so, the controller opens a demand window, the demand window having a duration exceeding the demand interval. The controller then obtains a plurality of additional demand values for the duration of the demand window, each of the additional demand values corresponding to one of a plurality of additional demand intervals within the demand window. The controller records in the list of highest demands in the memory location a select one of the demand value and plurality of additional demand values. The select demand value may suitably be the largest demand in the window.

Electrical utility meter with event-triggered window for highest demands logging

A utility meter implementing the ANSI C12.19 standard is able to bypass security processing using Decade4 security tables for a single data access operation. The meter includes a procedure that is executed by a processor in the meter to process requests for security keys. Data internal to the meter is used to generate a security key. The security key is used by the requesting external device and the procedure to generate an access key. The external device sends its access key to the procedure so it may be compared to the internally generated access key. If both access keys are the same, a data access operation performed by the external device is allowed without reference to the Decade4 security tables. Once a timeout or data access operation is performed, subsequent data access operations are subject to processing in accordance with the Decade4 security tables unless another security key is requested for repetition of the process.

System and method for accessing read only ANSI tables in an electricity meter

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Watt-hour meter with communication on diagnostic error detection

Electrical utility meter with event-triggered window for highest demands logging

System and method for accessing read only ANSI tables in an electricity meter