TIDA-00128, Low-Power, Low-Noise Analog Front End Design for Circuit Breakers (ACB/MCCB-ETU)

TIDA-00128, Low-Power, Low-Noise Analog Front End Design for Circuit Breakers (ACB/MCCB-ETU). 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 70C and high electromagnetic immunity