초록 ▼

A power supply generated through a set of current transformers is disclosed. The current transformers may be removably attached to a primary power line such as a high voltage power line. The power supply may be used to power a device or charge a battery for a device that requires a low voltage input

A power supply generated through a set of current transformers is disclosed. The current transformers may be removably attached to a primary power line such as a high voltage power line. The power supply may be used to power a device or charge a battery for a device that requires a low voltage input. The power supply may be used in underground vaults and pad mounted chambers that contain high voltage power lines. The power supply may generate a low voltage direct current out put that is not available in the vicinity of high voltage power lines in an underground vault or pad mounted chamber.

대표청구항 ▼

What is claimed is: 1. A system comprising: a plurality of current transformers, each adapted to generate an alternating current on a corresponding one of a plurality of secondary lines based on a polyphase current in a primary line, wherein each of the plurality of current transformers is configur

What is claimed is: 1. A system comprising: a plurality of current transformers, each adapted to generate an alternating current on a corresponding one of a plurality of secondary lines based on a polyphase current in a primary line, wherein each of the plurality of current transformers is configured to transform a different phase of a primary line current; a housing; a polyphase rectifier circuit in the housing, the rectifier circuit in electrical communication with each of the plurality of current transformers, the rectifier circuit being adapted to rectify the alternating current on each of the plurality of secondary lines; and a load controller in the housing, the load controller in electrical communication with the rectifier circuit, the load controller to limit current and regulate voltage from the rectifier circuit, the load controller to output a direct current. 2. The system of claim 1, further comprising: a rechargeable battery to receive the direct current. 3. The system of claim 2, further comprising: a temperature compensation circuit to adjust the direct current based on one of an ambient condition and a battery condition. 4. The system of claim 1, wherein the system is autonomous from any power source other than the primary line. 5. The system of claim 1, wherein each of the plurality of current transformers is a split core transformer and attachable to the primary line without altering the primary line. 6. The system of claim 1, further comprising: a remote terminal unit that operates on the direct current. 7. A method comprising: inducing an alternating current on each of a plurality of secondary lines utilizing a corresponding one of a plurality of current transformers coupled to a polyphase primary line, wherein each of the plurality of current transformers is configured to transform a different phase of a primary line current; rectifying the alternating current on each of the plurality of secondary lines; and limiting current on each of the plurality of secondary lines to output a direct current at a constant voltage for at least one of charging a battery or operating a device. 8. The method of claim 7, further comprising: regulating the voltage of the direct current. 9. The method of claim 7, further comprising: attaching each of the plurality of current transformers to the primary line without altering the primary line. 10. The method of claim 7, further comprising: altering the direct output based on one of ambient conditions and battery condition. 11. The method of claim 8, wherein regulating the voltage provides an approximately 12 volt direct current output. 12. The system of claim 1, wherein the housing comprises a hermetically sealed housing. 13. The method of claim 7, wherein the limiting current on each of the plurality of secondary lines to output a direct current at a constant voltage for at least one of charging a battery or operating a device comprises limiting current on each of the plurality of secondary lines to output a direct current at a constant voltage for operating a device, the device being autonomous from any power source other than the primary line and the plurality of secondary lines. 14. A system comprising: a first current transformer configured to generate a first alternating current on a secondary line based on a current in a primary line, the primary line carrying a primary line current at a voltage of between about 15 kilovolts and 35 kilovolts; a housing; a rectifier circuit in the housing, the rectifier circuit in electrical communication with the first current transformer and configured to rectify the first alternating current on the secondary line; a load controller in the housing, the load controller in electrical communication with the rectifier circuit, the load controller configured to limit current and regulate voltage from the rectifier circuit and output a direct current; and a device for monitoring or controlling the primary line or another device located near the system, the device receiving the direct current output of the load controller, wherein the system is autonomous from any power source other than the primary line, and when the primary line current is between about 50 and 600 amperes, the direct current output has a power that is between about 7 watts and 55 watts. 15. The system of claim 14, wherein the device is for monitoring or controlling the primary line or other lines. 16. The system of claim 1, wherein a voltage on the primary line is between about 15 kilovolts and 35 kilovolts, and when the primary line current is between about 50 amperes and 600 amperes, the direct current has a power that is between about 13 watts and 59 watts when two of the plurality of current transformers are in operation. 17. The system of claim 1, wherein a voltage on the primary line is between about 15 kilovolts and 35 kilovolts, and when the primary line current is between about 50 amperes and 600 amperes, the direct current has a power that is between about 20 watts and 64 watts when three of the plurality of current transformers are in operation. 18. The system of claim 16, wherein the direct output is about 12 volts. 19. The system of claim 17, wherein the direct output is about 12 volts. 20. The method of claim 7, wherein a voltage on the primary line is between about 15 kilovolts and 35 kilovolts, and when the primary line current is between about 50 amperes and 600 amperes, the direct current has a power that is between about 13 watts and 59 watts when two of the plurality of current transformers are in operation. 21. The method of claim 7, wherein a voltage on the primary line is between about 15 kilovolts and 35 kilovolts, and when the primary line current is between about 50 amperes and 600 amperes, the direct current has a power that is between about 20 watts and 64 watts when three of the plurality of current transformers are in operation. 22. The system of claim 1, wherein the housing is: physically separated from the primary line and the plurality of current transformers, and electrically connected to each of the plurality of current transformers via the corresponding one of the plurality of secondary lines. 23. The system of claim 14, further comprising a second current transformer adapted to generate a second alternating current on a second secondary line based on the primary line current, wherein: the primary line current is a polyphase current; each of the first current transformer and the second current transformer is configured to transform a different phase of the primary line current; the rectifier circuit is: a polyphase rectifier circuit, in electrical communication with the second current transformer, and adapted to rectify the second alternating current on the second secondary line; and when the primary line current is between about 50 amperes and 600 amperes, the power of the direct current output is between about 13 watts and 59 watts when the first current transformer and the second current transformer are in operation. 24. The system of claim 23, further comprising a third current transformer adapted to generate a third alternating current on a third secondary line based on the primary line current, wherein: the third current transformer is configured to transform a different phase of the primary line current than the first current transformer and the second current transformer; the rectifier circuit is: in electrical communication with the third current transformer, and adapted to rectify a third alternating current on the third secondary line; and when the primary line current is between about 50 amperes and 600 amperes, the power of the direct current output is between about 20 watts and 64 watts when the first current transformer, the second current transformer, and the third current transformer are in operation.