摘要:
One embodiment describes a utility metering system (10). The utility metering system includes a utility meter (16) that is communicatively coupled to a utility service provider (14), in which the utility meter includes firmware (24). The utility meter (16) stores a firmware update downloaded from the utility service provider (14), determines a particular time to update the firmware (24) with the firmware update, in which the particular time is determined based at least in part on historical time of use data, time of use pricing rates, or a combination thereof. The historical time of use data includes utility consumption by a consumer over time and the time of use pricing rates includes the price per unit of utility charged to the consumer. Additionally, the utility meter (16) updates the firmware (24) at the particular time.
摘要:
Line voltage and line current signals are sensed (110,120) on a power line having at least one conducting path (220 A-C). The sensed line voltages and line currents are converted (320) into a digital signal. A phase-to-neutral voltage signal and phase current signal are computed (330) from the digital signal to thereby define a phase of the power line. An interval of orthogonality is determined from the sensed voltage and current signals, coinciding with passage of an integral number of cycles of a fundamental frequency reference signal which is computed from the computed phase-to-neutral voltage signal. A vector metering quantity is computed for the determined interval of orthogonality from the computed phase-to-neutral voltage signal and the computed phase current signal. The vector metering quantities to be computed may be identified and computed based upon an associated detent. The vector metering quantity is also computed based on an identified circuit topology.
摘要:
A system includes a utility meter 30. The utility meter 30 includes a sensor 60, 61 configured to detect a utility usage, a processor 46 configured to determine an ambient temperature of the utility meter 30, and a memory 48 configured to store a data collection system 70. The data collection system 70 is configured to be utilized by the processor 46 to store the utility usage at least partially according to the ambient temperature of the utility meter 30.
摘要:
A method (144) for locating a ground fault in an electrical power distribution system (12) includes providing a plurality of current sensors (14, 16, 17, 18, 20, 22) at a plurality of locations in the electrical power distribution system (12). The method (144) further includes detecting a ground fault in the electrical power distribution system (12). Current is monitored at a plurality of locations in the electrical power distribution system (12) via the current sensors (14, 16, 17, 18, 20, 22) and a test signal is introduced into the electrical power distribution system (12) via a test signal generating device (44). The plurality of locations are monitored (62) to locate the ground fault between a location at which the test signal is detected and a downstream location at which the test signal is not detected.
摘要:
A system is provided with a utility meter 18. The utility meter 18 includes a memory 26 storing a table 30, wherein the table 30 specifies modifiable data that may be modified when the utility meter 18 is sealed and non-modifiable data that may not be modified when the utility meter 18 is sealed. The utility meter 18 also includes a processing device 24 configured to access the table stored on the memory 26 or another memory to determine whether specific data stored on the memory 26 or another memory may be modified when the utility meter 18 is sealed.
摘要:
The present invention, in one embodiment, comprises an energy meter capable of converting from one mode of operation to another mode of operation. In the one embodiment, the present invention comprises means for measuring energy consumption, and means for converting operation of the measuring means from a first mode to a second mode.
摘要:
The present invention, in one embodiment, comprises an energy meter capable of converting from one mode of operation to another mode of operation. In the one embodiment, the present invention comprises means for measuring energy consumption, and means for converting operation of the measuring means from a first mode to a second mode.