These voltages are optically coupled and electrically remoted to the inputs of the low voltage circuits by utilizing low voltage power line optically coupled isolators. Furthermore, the cost of resistors and isolators are much less as in comparison with that of the transformers. In addition, the transformer-much less approach is the smaller size as in contrast with that of transformers to allow a compact form issue design. Some great benefits of this transformer-much less method as in comparison with the transformer approach are direct sensing of current and voltage that enables AC energy and vitality measurements for non-resistive hundreds, tamper proof for secure energy measurements, compact sizes, and low prices. The circuit designs for voltage and current sensing's and electrical isolation are disclosed. FIG. 5 is an illustration of circuit for voltage sensing transistor in an emitter follower configuration with a load resistor linked to the emitter. FIG. 1 is an illustration of the sensible meter system 50 in accordance with an embodiment. The system and technique must be easily carried out, cost efficient and adaptable to current programs. The tactic consists of coupling at the very least one resistor to a high voltage portion of the good meter. Accordingly, many modifications may be made by certainly one of ordinary talent in the artwork without departing from the spirit and scope of the current invention.
A key feature of the current invention is that there is no want for a transformer when sensing voltage and present. 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's optically coupled to the IF LED 66. The emitter terminal E is linked to the Vss terminal 71. The collector terminal C is linked to the second terminal of a resistor RL sixty nine in the open collector configuration. FIG. Four is an illustration of circuit for present sensing for the open collector configuration with a load resistor linked to the collector. FIG. 3 is an illustration of circuit design for current sensing transistor in an emitter follower configuration with load resistor related to the emitter. FIG. 3 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 energy line system. The database might be analyzed to determine optimum power usage and distribution. In so doing, resistors might be utilized to supply the current or voltage sensing properties of the smart meter.
By eliminating the transformer the good meter will be bodily smaller, much less costly and is not going to be tampered as within the case when the transformer core is positioned in a saturation situation. FIG. 2 is an illustration of a smart meter three in accordance with an embodiment. FIG. 1 is an illustration of smart meter system. FIG. 2 is an illustration of a wise meter in accordance with an embodiment. In a primary facet a way of sensing current inside a smart meter is disclosed. The method contains coupling a resistor voltage divider to a high voltage portion of the sensible meter. The tactic additionally includes optically coupling the high voltage portion to a low voltage portion of the good meter. Using optically coupled isolators, the sensed voltages within the high voltage energy lines are optically coupled and electrically isolated to the low voltage circuits. Circuits for the voltage and present sensing methodology are described utilizing resistors and optically coupled isolators. A transformer-much less method and system for voltage and current sensing using voltage drops throughout resistors is disclosed.
The current invention is related typically to meters for measuring power and more notably to a wise meter system. The primary terminal of a small shunt resistor RS 7 is related in series with the recent line of power line pair 6 which is a excessive voltage portion 100; the other energy line 5 is the impartial or floor line. The battery backup 36 enables the detection of energy failure in the smart meter 3. The status of the battery backup 36 is reported within the Status register. There may be a need to boost system efficiency, reliability, testability and manufacturability of the smart meter during the product production and prototyping. The good meter system 50 includes a local server 1 related to a coordinator 2 and smart meters three (smart meter 1-N). In a single embodiment, the local server 1 is linked to the coordinator 2 through wires. The smart meter system 50 is a many-to-one information communication topology. This is made potential by optically isolating a excessive voltage portion of the smart meter from a low voltage portion. An optical transistor 57 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 connected to the VDD terminal 56. The emitter terminal E is connected to the primary terminal of a resistor RL 58 within the emitter follower configuration.
Smart Meter Voltage Sensing using Optically Coupled Isolators
by Hiram Sharwood (2025-01-30)
By eliminating the transformer the good meter will be bodily smaller, much less costly and is not going to be tampered as within the case when the transformer core is positioned in a saturation situation. FIG. 2 is an illustration of a smart meter three in accordance with an embodiment. FIG. 1 is an illustration of smart meter system. FIG. 2 is an illustration of a wise meter in accordance with an embodiment. In a primary facet a way of sensing current inside a smart meter is disclosed. The method contains coupling a resistor voltage divider to a high voltage portion of the sensible meter. The tactic additionally includes optically coupling the high voltage portion to a low voltage portion of the good meter. Using optically coupled isolators, the sensed voltages within the high voltage energy lines are optically coupled and electrically isolated to the low voltage circuits. Circuits for the voltage and present sensing methodology are described utilizing resistors and optically coupled isolators. A transformer-much less method and system for voltage and current sensing using voltage drops throughout resistors is disclosed.
The current invention is related typically to meters for measuring power and more notably to a wise meter system. The primary terminal of a small shunt resistor RS 7 is related in series with the recent line of power line pair 6 which is a excessive voltage portion 100; the other energy line 5 is the impartial or floor line. The battery backup 36 enables the detection of energy failure in the smart meter 3. The status of the battery backup 36 is reported within the Status register. There may be a need to boost system efficiency, reliability, testability and manufacturability of the smart meter during the product production and prototyping. The good meter system 50 includes a local server 1 related to a coordinator 2 and smart meters three (smart meter 1-N). In a single embodiment, the local server 1 is linked to the coordinator 2 through wires. The smart meter system 50 is a many-to-one information communication topology. This is made potential by optically isolating a excessive voltage portion of the smart meter from a low voltage portion. An optical transistor 57 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 connected to the VDD terminal 56. The emitter terminal E is connected to the primary terminal of a resistor RL 58 within the emitter follower configuration.