Chapter 246

Simple energy-tripped circuit breaker with automatic delayed retry

Tim Regan

Abstract

A simple energy-tripped circuit breaker with automatic delayed retry is described.

Keywords

Circuit breaker

LT6108-2 current sense amplifier

LTC6994-2 Timerblox delay timer

Introduction

A circuit breaker protects sensitive load circuits from excessive current flow by opening the power supply when the current reaches a predetermined level. The simplest circuit breaker is a fuse, but blown fuses require physical replacement. An electronic circuit breaker provides the same measure of circuit protection as a fuse without the single-use problem. Nevertheless, an electronic circuit breaker with a fixed trip current threshold, while effective ...

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