Fault Monitoring for Overhead Fault Indicators using Ultra Low Power Reference Design


Design files


Fault Indicators (FI) are devices installed at certain distance on overhead power lines in electric power distribution networks to detect and indicate the occurence of faults. The benefit is reduction in outage times by identifying the fault zone easily.  The TIDA-00807 reference design features an ultra‐low power MCU and discrete analog front end to monitor and measure the current and voltage parameters where it is installed.In addition, a self‐test mechanism comprising of a DAC and Hall Switch can be configured to execute a diagnostic program that permits the system to test itself.

  • Current voltage measurement range: 0.5-100A, 50-300V
  • Measurement accuracy: ≤±2%
  • Multiple gain stage and ADC channels used for covering wide curent and voltage range
  • Dual rail, configurable DC-DC converter (with integrated load switch) adds flexibility with power savings
  • MCU selected based on ultra-low power consumption, small pin count and footprint
  • Self test - fault current simulation using DAC and self test magnet detection using hall switch
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.


Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDRMK3.ZIP (2091 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

MSP430 microcontrollers

MSP430FR57288 MHz MCU with 16KB FRAM, 1KB SRAM, 10-bit ADC , comparator, UART/SPI/I2C, timer

Data sheet: PDF | HTML
Analog switches & muxes

SN74LVC1G31575-V, 2:1 (SPDT), 1-channel general-purpose analog switch

Data sheet: PDF | HTML
Buck converters (integrated switch)

TPS627402.2V-5.5V input, ultra-low-power 300mA step-down buck DCDC converter with 360nA Iq

Data sheet: PDF | HTML
Hall-effect latches & switches

DRV5032Low power (5 Hz, <1µA), low voltage (up to 5.5V) switch

Data sheet: PDF | HTML
Precision DACs (≤10 MSPS)

DAC101C08110-Bit Micro Power Digital-to-Analog Converter with an I2C-Compatible Interface

Data sheet: PDF | HTML
Precision op amps (Vos<1mV)

OPA2317Dual, Low Offset, Rail-to-Rail I/O Operational Amplifier

Data sheet: PDF | HTML
Shunt voltage references

LM4041-NFixed & adjustable, 45-µA, precision micropower shunt voltage reference

Data sheet: PDF

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Technical documentation

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Type Title Date
* Design guide Fault Monitoring for Overhead Fault Indicators Ultra-Low-Power Design Guide (Rev. A) May 19, 2017
Technical article Benefits of using Sub-1 GHz connectivity for grid asset monitoring, protection and control May 28, 2020

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