Zero drift PGA based Analog Front End Design for Circuit Breakers (ACB/MCCB-ETU)
Description
This reference design is intended for use in molded case circuit breakers (MCCB) electronic trip units. The programmable gain amplifier based design acts as the current monitoring for over-current earth fault relays. Utilizing a zero drift programmable amplifier: this design provides a ±10 % pick-up (A) accuracy and time delay (s) accuracy of 0 to -20%. Additionally: this solution was designed to handle harsh environment conditions by including features such as ambient insensitivity from -10 to 70 ⁰C and high electromagnetic immunity. Finally the analog front end of this design interfaces seemlessly with the TI MSP430 MCU for quicker evaluation and faster time-to-market.
Features
- Architecture enables the customer to easily create multiple circuit breaker models with different current rangesUsing programmable gain control: fault current sensing range can be increased to > 10 times Ir and Lower total manufacturing cost with reduced component count and less calibration time vs. discrete opamp based electromechanical solutionRobust design with ambient insensitivity from -10 to +70 °C and better trip time repeatability vs. discrete opamp based electromechanical solutionWide input DC-DC converter with under voltage and overcurrent protectionSelf-power (CT powered) supply with reduced CT loading and lower power loss
Applications
- Residential breakers
- Grid asset monitoring
- Compact relay
- Circuit breaker (ACB
- MCCB
- VCB)
- Smart electrical panel
Product Categories
- Amplifiers
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| Download the bill of materials for TIDA-00130 | Download |
Test Data
Get results faster with test and simulation data that's been verified.
Download the test file for TIDA-00130| Title | Updated | Type | Size (KB) | |
|---|---|---|---|---|
| TIDA-00130 PCB | 18 Mar 2014 | 2355 | ||
| TIDA-00130 BOM | 18 Mar 2014 | 207 | ||
| TIDA-00130 Schematic | 18 Mar 2014 | 421 |