Low-Cost Three-Phase Electricity Meter Reference Design
Texas Instruments
Description
The design implements a basic three-phase electric meter system using the MSP430F449 smart meter SoC: the LMV324 precision op amps: and TPS76333 LDO regulator . It meets all of the requirements for ANSI C12.20 and IEC-62053 Class 0.5 meters.The MSP430F449 SoC is a low-cost option for engineers developing polyphase energy measurement systems for utility meters and industrial applications. . The LMV324 op amps are used for conditioning the voltage and current signals coming from the current transformers. The design uses a capacitive-drop power supply based on the TPS76333 to provide a low-cost power supply solution. Hardware and software design files are provided to enable calculation of various parameters for three-phase energy measurement: such as RMS current & voltage: active and reactive power and energies: power factor and frequency. With this design developers can quickly determine that the MSP430F449 e-meter SoC meets the requirements for their low-cost smart e-meter.
End equipment reference diagrams
| Application area | End equipment |
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https://www.ti.com/solution/grid-asset-monitoring#referencedesigns |
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Features
Three-phase electricity meter that meets Class 0.5 accuracy requirements from ANSI and IEC TI Energy Library firmware calculates all energy measurement parameters including active and reactive power and energy: RMS current and voltage: power factor: and line frequency Built-in 160-segment display Powered from three-phase line voltage
Applications
- Grid asset monitoring
- Compact relay
Product categories
- MSP430 microcontrollers
