Leakage Current Measurement Reference Design for Determining Insulation Resistance

(ACTIVE) TIDA-00440

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Key Document

Description

This TI design provides a reference solution to measure Insulation Resistance up to 100MΩ. It has an on-board isolated 500Vdc 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 100MΩ 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 500V Power Supply to  measure the insulation resistance
  • Provision for Calibration Resistor on board
  • Hardware support for Start-of-Frame Detect allows implement IEEE1588 PTP

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




TI Devices (8)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD13202Q2  N-Channel Power MOSFET, CSD13202Q2, 12V Vds, 9.3mohm Rdson4.5 (max)  Power MOSFET  Sample & Buy Not Available
INA225  36-V Programmable-Gain, Bidirectional, Zero-Drift, High-Speed, Voltage Output Current-Shunt Monitor  Current Sense Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
INA333  Low-Power, Zero-Drift, Precision Instrumentation Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
ISO7640FM  6kVpk Low Power Quad Channels, 150Mbps Digital Isolators  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LM5160A  LM5160A Wide Input 65V, 2A Synchronous Buck / Fly-Buck™ Converter  Step-Down (Buck)  Sample & Buy View Design Kits & Evaluation Modules
LP2985-N  Micropower 150-mA Low-Noise Ultra-Low-Dropout Regulator in SOT-23 packages  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules
TS5A23157  Dual 10-Ohm SPDT Analog Switch  Switches and Multiplexers  Sample & Buy Not Available
UCC28711  Constant-Voltage, Constant-Current PWM Controller with Primary-Side Regulation  Offline and Isolated DC/DC Controllers and Converters  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 2507 30 Apr 2015 4,460
Selection guides (1)
Title Abstract Type Size (KB) Date Views
PDF 1572 29 Mar 2017 12,414
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 897 27 Mar 2015 129
ZIP 6588 27 Mar 2015 94
ZIP 288 27 Mar 2015 61
ZIP 248 27 Mar 2015 51
PDF 68 27 Mar 2015 75
ZIP 847 27 Mar 2015 377


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