Where To start With Low Voltage Power Line? > 자유게시판

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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 sixty nine has a base terminal B that is optically coupled to the IF LED 66. The emitter terminal E is linked to the Vss terminal 71. The collector terminal C is related to the second terminal of a resistor RL sixty nine in the open collector configuration. FIG. 4 is an illustration of circuit for present sensing for the open collector configuration with a load resistor related to the collector. One frequent method to realize that is to use voltage and current transformers. Although the present invention has been described in accordance with the embodiments proven, one in every of strange talent within the artwork will readily recognize that there could possibly be variations to the embodiments and those variations would be inside the spirit and scope of the current invention.

FIG. 1 is an illustration of the sensible meter system 50 in accordance with an embodiment. FIG. Three is an illustration of circuit design for a current sensing portion of voltage and present sensors 39 within the smart meter 3 of FIG. 2 for a single-phase power line system. The sensible meter three comprises a energy provide 35, a battery backup 36, a liquid crystal show or LCD display 37, a RF controller System-on-Chip (SOC) 38, and voltage and present sensors 39. The battery backup 36 supplies a non-interruptible energy provide within the occasion of a power failure. In a first side a technique of sensing present within a sensible meter is disclosed. Circuits for the voltage and present sensing methodology are described using resistors and optically coupled isolators. Furthermore, the price of resistors and isolators are much less as compared to that of the transformers. In so doing, resistors might be utilized to offer the present or voltage sensing properties of the good meter. In a second side, a way of sensing voltage inside a smart meter is disclosed. Accordingly, what is required is a system and methodology that addresses such needs.

There's a need to boost system efficiency, reliability, testability and manufacturability of the smart meter during the product manufacturing and prototyping. The smart meter system 50 includes a neighborhood server 1 linked to a coordinator 2 and sensible meters three (smart meter 1-N). In a single embodiment, the native server 1 is connected 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 data packet wirelessly to the smart meters three by a radio frequency (RF) link, e.g. ZigBee that will or might not help an business commonplace akin to IEEE 802.14.5. Then the sensible meters three send an acceptable response back to the coordinator 2 by the identical RF link. The present invention is expounded usually to meters for measuring energy and more notably to a sensible meter system. To describe the features of the current invention in additional element refer now to the following description in conjunction with the accompanying Figures.

"That's something that National Grid is evaluating right now in terms of now we have communication panels which are at the seaside house at this time, just explaining the problems concerning the cable problem, of a no anchor zone that you just see on the market, low voltage power line and trying to stop one thing from occurring that we wouldn't want to occur," Roberge said. No. 14/330,765, filed on Jul. 14, 2014, Jul. 14, 2014, now U.S. A smart meter system voltage and current sensing are carried out as voltage drops throughout a shunt resistor in sequence with the power line or from a voltage divider linked across the facility strains. A transformer-less methodology and system for voltage and current sensing utilizing voltage drops across resistors is disclosed. Some great benefits of this transformer-less methodology as in comparison with the transformer method are direct sensing of current and voltage that allows AC power and power measurements for non-resistive masses, tamper proof for secure energy measurements, compact sizes, and low costs.