Low Voltage Power Line For Dollars > 자유게시판

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FIG. 7 is an illustration of circuit for voltage and current sensing for the emitter follower configuration for a 3-part energy line application. FIG. 6 is an illustration of circuit for voltage sensing transistor within the open collector configuration with a load resistor RL 69. An optical transistor 69 has a base terminal B that's optically coupled to the IF LED 66. The emitter terminal E is linked to the Vss terminal 71. The collector terminal C is connected to the second terminal of a resistor RL sixty nine within the open collector configuration. An optical transistor 12 has a base terminal B that is optically coupled to the IF LED which is a low voltage portion 102. The collector terminal C is linked to the VDD terminal 11. The emitter terminal E is connected to the primary terminal of a resistor RL 13 in an emitter follower configuration. The method includes coupling no less than one resistor to a high voltage portion of the good meter. Using optically coupled isolators, the sensed voltages within the high voltage power lines are optically coupled and electrically isolated to the low voltage circuits. If you reside close to the proposed power strains this may affect property values and be a harmful well being hazard.

The battery backup 36 allows the detection of energy failure within the smart meter 3. The standing of the battery backup 36 is reported in the Status register. The smart meter three includes a power supply 35, a battery backup 36, a liquid crystal display or LCD show 37, a RF controller System-on-Chip (SOC) 38, and voltage and current sensors 39. The battery backup 36 supplies a non-interruptible energy supply in the occasion of a power failure. The good meter system 50 comprises a local server 1 connected to a coordinator 2 and smart meters 3 (smart meter 1-N). In a single embodiment, the native server 1 is related to the coordinator 2 through wires. On this embodiment, the local server 1 points a command to the coordinator 2 which executes the command by sending a corresponding information packet wirelessly to the good meters three by a radio frequency (RF) link, e.g. ZigBee which will or may not assist an business standard corresponding to IEEE 802.14.5. Then the smart meters three ship an appropriate response again to the coordinator 2 by the same RF hyperlink. The current invention is related usually to meters for measuring energy and extra notably to a wise meter system.

The strategy additionally consists of optically coupling the high voltage portion to a low voltage portion of the smart meter. The method consists of coupling a resistor voltage divider to a high voltage portion of the good meter. In sensible meter system voltage and current sensing, electrical isolation between the excessive voltage and the low voltage domains is critical. Although the electric companies claim that these high voltage transmission lines are protected for the general public, they emit an immense quantity of electro-magnetic radiation. The first terminal of a small shunt resistor RS 7 is linked in series with the new line of energy line pair 6 which is a high voltage portion 100; the opposite power line 5 is the impartial or floor line. An optical transistor 57 has a base terminal B that's optically coupled to the IF LED which is a low voltage portion 102. The collector terminal C is linked to the VDD terminal 56. The emitter terminal E is related to the first terminal of a resistor RL 58 in the emitter follower configuration. FIG. Three is an illustration of circuit design for a current sensing portion of voltage and present sensors 39 in the sensible meter three of FIG. 2 for a single-section power line system.

The circuit SI1 seventy three senses the current of L1 phase; the circuit SV1 74, senses the voltage of L1 section; the circuit SI2 75, senses the present of L2 phase; the circuit SV2 76, senses the voltage of L2 section; the circuit SI3 77, senses the current of L3 phase; the circuit SV3 78, senses the voltage of L3 section. One common manner to attain that is to use voltage and current transformers. The next description is introduced to enable one of ordinary ability in the art to make and use the invention and is provided within the context of a patent application and its necessities. Although the present invention has been described in accordance with the embodiments shown, one among strange ability within the art will readily recognize that there could be variations to the embodiments and those variations can be inside the spirit and scope of the current invention. A key characteristic of the current invention is that there is no such thing as a need for a transformer when sensing voltage and present. A transformer-much less technique and system for voltage and current sensing using voltage drops across resistors is disclosed.