Research and Design of Three-Phase Inconsistent Protection Circuit for Circuit Breaker Based on Chip Technology

Abstract

The typical configuration of inconsistent protection of circuit breaker is that the auxiliary switch of circuit breaker is connected in series and parallel with start-up time relay, and the outlet relay is tripped by delay start-up. In order to improve the reliability of circuit breaker, this paper presents a new design idea of inconsistent protection of circuit breaker based on chip technology, and presents a phased digitized site designed with circuit breaker mechanism as a whole. The overall architecture scheme mainly consists of module and general control module. The phase-separated digitized local module realizes on-site acquisition of circuit breaker position and optical fiber transmission. The main control module realizes ontology inconsistent logic operation, exit and communication with spacer layer. The design scheme uses chip processing instead of traditional relay and optical fiber transmission instead of traditional cable, effectively avoiding relay and circuit differences. The misoperation often caused can greatly improve the reliability of inconsistent protection of circuit breaker.