aerobotics

Leakage current measurement reference design for determining insulation resistance

TIDA-00440

Overview

This TI design provides a reference solution for measuring insulation resistance up to 100MΩ. The design features an on-board isolated 500Vdc power supply and isolated signal conditioning circuitry for measuring leakage current. This design is useful for finding leaks due to insulation breakdown in transformers and motor windings.

characteristic

● Leakage current measurement circuit with options for programmable current sense amplifier and switchable shunt resistor
●Measurement range: 0 to 100MΩ, accuracy 5% (uncalibrated)
● Derived from IEEE 43-2000 ("Recommended Practice for Insulation Resistance Testing of Rotating Electrical Machines")
● Test voltage level
● Onboard isolated 500V power supply for measuring insulation resistance
● Provides on-board calibration resistors
● Provide hardware support for "Start of Frame Detection", so IEEE1588 PTP can be implemented

Backlog Impt notice changes Backlog Impt notice changes end

Blockdiagram

Design Files

Documentation

Leakage Current Measurement Ref Design for Determining Insulation Resistance

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Update:2025-06-21 22:56:49

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