Energy meter with power quality monitoring systems and methods
First Claim
1. A system for monitoring power quality events of electrical energy provided to an energy meter via a service type, comprising:
- storage means for storing reference information reflective of at least one service type;
means for measuring characteristics of said electrical energy over a predetermined and tunable time period; and
means for retrieving said reference information from said storage means and comparing said measured characteristics to said reference information for the service type to determine the occurrence of power quality events.
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Accused Products
Abstract
A system for monitoring power quality events of electrical energy provided to an energy meter via a service type comprises a memory for storing reference information reflective of different service types, a digital signal processor for measuring characteristics of the electrical energy, and a microcontroller for retrieving the reference information from the memory and comparing the measured characteristics to the reference information for the service type to determine the occurrence of power quality events. For each power quality event, at least one of a start time, a stop time, a duration, a measured phase, a magnitude of a measured quantity, and a predisturbance value, and a cumulative total of the power quality events is recorded.
213 Citations
49 Claims
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1. A system for monitoring power quality events of electrical energy provided to an energy meter via a service type, comprising:
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storage means for storing reference information reflective of at least one service type;
means for measuring characteristics of said electrical energy over a predetermined and tunable time period; and
means for retrieving said reference information from said storage means and comparing said measured characteristics to said reference information for the service type to determine the occurrence of power quality events. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A process for monitoring power quality events in electrical energy provided to an energy meter via a service type, comprising the steps of:
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storing reference information in a memory reflective of at least one service type;
measuring characteristics of said electrical energy provided to the energy meter over a predetermined and tunable time period; and
retrieving said reference information from said memory and comparing said measured characteristics to said reference information for the service type to determine the occurrence of power quality events. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31)
accessing said power factor limits in said power factor test limit table in a first direction when said service type is multiphase and has an ABC rotation; and
accessing said power factor limits in said power factor test limit table in a second direction when said service type said service type is multiphase has a CBA rotation, said second direction opposite said first direction.
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31. The process according to claim 22, wherein said step of comparing said measured characteristics comprises comparing said reference information and said measured characteristics using programmable comparison routines.
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32. A system for monitoring power quality events of electrical energy provided to an energy meter via a service type, comprising:
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a first storage device for storing reference information reflective of at least one service type;
a digital signal processor for measuring characteristics of said electrical energy over a predetermined and tunable time period; and
a microcontroller for retrieving said reference information from said first storage device and comparing said measured characteristics to said reference information for the service type to determine the occurrence of power quality events. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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Specification