Energy management of an electronic device using multiple electric power sources. The electric power sources may include a parasitic electric power source, a rechargeable electric power source, an intermittent electric power source, and a continuous electric power source. The electronic device furthe
Energy management of an electronic device using multiple electric power sources. The electric power sources may include a parasitic electric power source, a rechargeable electric power source, an intermittent electric power source, and a continuous electric power source. The electronic device further may include a power supply for receiving the electric power from the source(s) and supplying electric power to the various components of the electronic device that require power. The electronic device may include a source selector for controlling which power source supplies electric power to the power supply. Energy management of the electronic device may be configured to use a permanently exhaustible power source such as a battery only when other power sources are unavailable.
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1. A power management system for an electronic device, comprising: a parasitic electric power source comprising a parasitic electrical connection to an electric power transmission or distribution conductor;a rechargeable power source;a power supply in electrical communication with the parasitic elec
1. A power management system for an electronic device, comprising: a parasitic electric power source comprising a parasitic electrical connection to an electric power transmission or distribution conductor;a rechargeable power source;a power supply in electrical communication with the parasitic electric power source and the rechargeable power source for supplying electric power to the electronic device, and,a power source selector selecting between the parasitic and rechargable power source for providing electrical power to the electronic device and to control charging of the rechargeable power source;a function selector supplying continuous power to a processor, and selecting power sinks for delivery of electric power to the selected power sinks of the electronic device upon availability of the parasitic electric power source;wherein the power source selector is configured to select the rechargeable power source to supply electric power only within a first predetermined temperature range. 2. The power management system of claim 1, wherein the parasitic electric power source comprises inductive coupling with the electric power conductor. 3. The power management system of claim 1, wherein the parasitic electric power source comprises capacitive coupling with the electric power conductor. 4. The power management system of claim 1, further comprising a continuous electric power source comprising a battery; and wherein the power selector selects the continuous electric power when electric power provided by the parasitic power source and the rechargeable power source are inadequate. 5. The power management system of claim 4, wherein the battery is internal to the electronic device. 6. The power management system of claim 4, wherein the battery is external to the electronic device. 7. The power management system of claim 1, wherein the power source selector is configured to select the parasitic power source unless the electric power provided by the parasitic power source is inadequate. 8. The power management system of claim 1, wherein the rechargeable power source comprises at least one selected from the group consisting of: a rechargeable battery, a capacitor, a supercapacitor, and combinations thereof. 9. The power management system of claim 1, further comprising an intermittent power source selected from the group consisting of: a photovoltaic cell, a thermoelectric generator, a piezoelectric generator, a wind turbine, a pyroelectric generator, and combinations thereof. 10. The system of claim 1, wherein the electronic device comprises a faulted circuit indicator. 11. The system of claim 1, wherein the function selector is configured to disable certain functions performed by the electronic device depending on the power source selected by the power source selector. 12. The system of claim 1, wherein the power source selector is configured to select based on a number of charge/discharge cycles of the rechargeable power source. 13. The power management system of claim 1, wherein the first predetermined temperature range comprises about −20° C. to about 60° C. 14. The power management system of claim 1, wherein the function selector is configured to select the rechargeable power source as a sink for delivery of electric power to charge the rechargeable power source under a second predetermined temperature range. 15. The power management system of claim 14, wherein the second predetermined temperature range comprises about 0° C. to about 45° C. 16. A faulted circuit indicator for monitoring and indicating faults on an electric power conductor, comprising: a signal acquisition circuit in communication with the electric power conductor for obtaining a signal from the electric power conductor;a microprocessor in communication with the signal acquisition circuit;a parasitic electric power source in communication with the electric power conductor for parasitically obtaining electric power from the electric power conductor;a continuous electric power source;a power supply in communication with the parasitic power source and the continuous electric power source for supplying electric power to the microprocessor; and, a function selector supplying continuous power to the microprocessor and selecting power sinks for delivery of electric power to the selected power sinks of the electronic device upon availability of the parasitic electric power source;wherein the faulted circuit indicator selectively disables a function of the microprocessor and at least one of the selected power sinks when the parasitic electric power supply is unavailable. 17. The faulted circuit indicator of claim 16, wherein the parasitic power source comprises inductive coupling with the electric power conductor. 18. The faulted circuit indicator of claim 16, wherein the parasitic power source comprises capacitive coupling with the electric power conductor. 19. The faulted circuit indicator of claim 16, wherein the continuous electric power source comprises one selected from the group consisting of: an internal battery, an external battery, another electronic device, and combinations thereof. 20. The faulted circuit indicator of claim 16, further comprising a power source selector configured to select between the parasitic and continuous power source for providing electrical power to the microprocessor. 21. The faulted circuit indicator of claim 20, wherein the power source selector is configured to select the parasitic power source unless the electric power provided by the parasitic power source is inadequate. 22. The faulted circuit indicator of claim 20, wherein the power source selector is further configured to select no power source. 23. The faulted circuit indicator of claim 20, wherein the function selector is configured to disable certain functions performed by the electronic device depending on the power source selected by the power source selector. 24. The faulted circuit indicator of claim 20, wherein the faulted circuit indicator is configured to power select functions with select power sources. 25. The faulted circuit indicator of claim 16, further comprising a rechargeable power source. 26. The faulted circuit indicator of claim 25, wherein the rechargeable power source comprises at least one selected from the group consisting of: a rechargeable battery, a capacitor, a supercapacitor, and combinations thereof. 27. The faulted circuit indicator of claim 25, further comprising a power source selector configured to select between the parasitic, rechargeable, and continuous power source for providing electrical power to the electronic device and for controlling charging of the rechargeable power source. 28. The faulted circuit indicator of claim 27, wherein the rechargeable power source comprises a rechargeable battery, and the power source selector is configured to allow charging of the rechargeable battery only under predetermined ambient temperature conditions. 29. The faulted circuit indicator of claim 27, wherein the rechargeable power source comprises a rechargeable battery, and the power source selector is configured to select the rechargeable battery to supply electric power only under predetermined ambient temperature conditions. 30. The faulted circuit indicator of claim 27, wherein the power source selector is configured to select based on a number of charge/discharge cycles of the rechargeable power source. 31. The faulted circuit indicator of claim 16, further comprising an intermittent power source selected from the group consisting of: a photovoltaic cell, a thermoelectric generator, a piezoelectric generator, a wind turbine, a pyroelectric generator, and combinations thereof. 32. The faulted circuit indicator of claim 31, further comprising a power source selector configured to select between the parasitic power source, the continuous power source, and the intermittent power source. 33. A monitoring device for monitoring the status of electrical power equipment, comprising: a signal acquisition circuit in communication with the electric power equipment for obtaining a signal from the electric power equipment and for detecting a fault condition based on an electric current flow through the electric power equipment;a microprocessor in communication with the signal acquisition circuit;a primary power acquisition circuit in electrical communication with the electric power equipment for obtaining electric power from the electric power equipment;a continuous electric power source;a fault communication circuit configured to provide one of a visual indication of the fault condition and an audible indication of the fault condition;a power supply in communication with the primary power acquisition circuit and the continuous electric power source for supplying electric power to the microprocessor; and, a function selector supplying continuous power to the microprocessor, and selecting power sinks for delivery of electric power to the selected power sinks of the electronic device upon availability of the primary power acquisition circuit;wherein the function selector is further configured to selectively supply power to the fault communication circuit from the continuous electric power source upon detection of the fault condition by the signal acquisition circuit and unavailability of the primary power acquisition circuit. 34. The monitoring device of claim 33, wherein the electric power equipment comprises a transformer and the primary power acquisition circuit comprises an electrical connection to a low side of the transformer. 35. The monitoring device of claim 34, wherein the signal acquisition circuit is in communication with a high side of the transformer. 36. The monitoring device of claim 33, further comprising a power source selector configured to select between the primary and continuous power sources. 37. The monitoring device of claim 36, wherein the power source selector is configured to select based on the availability of power from the primary and continuous power sources. 38. The monitoring device of claim 36, further comprising a rechargeable power source, and the power source selector is further configured to select among the primary, continuous, and rechargeable power sources. 39. The monitoring device of claim 36, further comprising an intermittent power source, and the power source selector is further configured to select among the primary, continuous, and intermittent power sources. 40. The monitoring device of claim 36, wherein the source selector is configured to select based on an ambient temperature. 41. A power management system for an electronic device, comprising: an intermittent power source;a rechargeable continuous electric power source;a power supply in electrical communication with the intermittent power source and the rechargeable continuous electric power source for supplying electric power to the electronic device;a power source selector in communication with the intermittent power source, the rechargeable continuous electric power source, and the power supply, for selectively switching between the intermittent power source and the rechargeable continuous electric power source;a function selector supplying continuous power to a processor, and selecting power sinks for delivery of electric power to the selected power sinks of the electronic device upon availability of the intermittent power source;wherein the power source selector is configured to select the rechargeable power source to supply electric power only within a first predetermined temperature range. 42. The power management system of claim 41, wherein the electronic device comprises a faulted circuit indicator. 43. The power management system of claim 41, wherein the intermittent power source comprises one selected from the group consisting of: a photovoltaic cell, a thermoelectric generator, a piezoelectric generator, a wind turbine, a pyroelectric generator, and combinations thereof. 44. The power management system of claim 41, wherein the second power source comprises one selected from the group consisting of: a parasitic power source, a rechargeable power source, a continuous power source, and combinations thereof. 45. A power management system for an electronic device, comprising: a parasitic electric power source comprising a parasitic electrical connection to an electric power transmission or distribution conductor;a primary cell configured to provide a first source of continuous electrical power;a rechargeable power source configured to provide a second source of continuous electrical power;a power supply in electrical communication with the parasitic electric power source, the primary cell, and the rechargeable power source;a power source selector configured to select between the parasitic electric power source, the primary cell, and the rechargeable power source; and,a function selector configured to selectively provide power to a plurality of power sinks, the function selector further configured to maximize the availability of a continuous supply power to a processor by selectively drawing power: first from the parasitic electric power source when power from the parasitic electric power source is available;second from the rechargeable power source when power from the parasitic electric power source is unavailable; andthird from the primary cell;wherein the plurality of power sinks comprise the processor and the rechargeable power source. 46. The power management system of claim 45, further comprising circuitry configured to maintain a flow of power to the processor during a time in which the function selector switches from drawing power from one of the parasitic electric power source, the rechargeable power source, and the primary cell. 47. The power management system of claim 45, wherein the plurality of power sinks further comprise at least one of a visual display and an audible indicator. 48. The power management system of claim 47, wherein at least one of the visual display and the audible indicator are configured to provide an indication of a faulted circuit associated with the electric power transmission or distribution conductor.
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