TIDA-00440
Leakage Current Measurement Reference Design for Determining Insulation Resistance
TIDA-00440
Overview
This reference design measures insulation resistance up to 100 MΩ. It has an on-board isolated 500-Vdc power supply and an isolated signal conditioning circuit to measure the leakage current. This design is useful to find leakage due to insulation breakdown in transformer and motor windings.
Features
- Leakage current measurement circuit with option for programmable current sense amplifier and switchable shunt resistors
- Range of measurement: 0 to 100 MΩ with accuracy of 5% (un-calibrated)
- Test voltage level derived from IEEE 43-2000 (recommended practice for testing insulation resistance of rotating machinery)
- On-board isolated 500-V power supply to measure insulation resistance
- Provision for calibration resistor on board
- Hardware support for start-of-frame detect allows implement IEEE1588 PTP
Industrial
- Flat panel display (FPD) test
- Hydraulic/Pneumatic actuator drive
- IGBT-based servo power stage
- IPM-based servo power stage
- Isolated AC drive power stage
- Multi-axis servo drive
- Multi-axis servo power stage
- Off-highway vehicles control systems
- Off-highway vehicles sensor systems
- Parametric measurement unit (PMU)
- Power analyzer
- Servo drive active frontend
- Single-axis servo drive
- Traction drive
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.
TIDU873A.PDF (2507 K)
Reference design overview and verified performance test data
TIDRDQ1.ZIP (847 K)
Detailed schematic diagram for design layout and components
TIDRDQ2.PDF (68 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRDQ3.ZIP (248 K)
Detailed overview of design layout for component placement
TIDRDQ6.ZIP (6588 K)
Files used for 3D models or 2D drawings of IC components
TIDCA04.ZIP (897 K)
Design file that contains information on physical board layer of design PCB
TIDRDQ5.ZIP (288 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
MOSFETs
CSD13202Q2 — 12-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 9.3 mOhm
Data sheet: PDF | HTMLStart development
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Leakage Current Measurement for Determining Insulation Resistance Design Guide (Rev. A) | Apr. 30, 2015 | |
| Selection guide | Current Sense Amplifiers (Rev. E) | Sep. 20, 2021 | ||
| Technical article | How to detect insulation failures in electrical equipment – part 2 | PDF | HTML | May 02, 2016 |
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