TIDA-00128 Reference Design

Texas Instruments

Low-Power: Low-Noise 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 op amp based design acts as current monitoring for over-current earth fault relays. Utilizing a low cost op amp: this design provides a pick-up (A) accuracy ±10 % and time delay (s) accuracy 0 to -20%. Additionally: this design takes harsh environment conditions in mind with features such as ambient insensitivity from  -10 to 70 °C and high electromagnetic immunity. Finally the analog front end of this design seemlessly interfaces to TI MSP430 MCU for quicker evaluation and faster time-to-market.

Features
  • Pick-up accuracy at ±10 % and time delay accuracy at 0 to -20% offer wide range of adjustment for maximum flexibilityAmbient insensitivity from -10 to +70 °C for global design and worldwide acceptanceExcellent trip time repeatabilityWide input DC-DC converter with under voltage and overcurrent protectionSelf-power (CT powered) supply with reduced CT loading and Power lossRobust design that prevents phase reversal in overdrive conditions and high electrostatic discharge (ESD) protection (4-kV HBM)
Applications
  • Fault indicator (FI)
  • Battery energy storage system
  • Residential breakers
  • Remote power distribution automation
  • Grid asset monitoring
  • Binary input module
  • Compact relay
  • Contractor circuit
  • Substation automation
  • Circuit breaker (ACB
  • MCCB
  • VCB)
  • Smart electrical panel
Product Categories
  • Amplifiers

Parts

Part Number Name Companion Part
CSD17571Q2 CSD17571Q2 Buy Datasheet
ISO1176 ISO1176 Buy Datasheet
LM293 LM293 Buy Datasheet
LM5017 LM5017 Buy Datasheet
LM62 LM62 Buy Datasheet
OPA4314 OPA4314 Buy Datasheet
TPS55010 TPS55010 Buy Datasheet

Software

Bill Of Materials

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Schematic

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Test Data

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Other Documents

Title Updated Type Size (KB)
TIDA-00128 Gerber 26 Feb 2014 ZIP 287
TIDA-00128 PCB 26 Feb 2014 PDF 2328
TIDA-00128 BOM 26 Feb 2014 PDF 204
TIDA-00128 Schematic 26 Feb 2014 PDF 426