Relé digital para proteção contra sobrecorrente e monitoramento da operação de motores de indução

• Ano de defesa: 2005
• Autor(a) principal: Paula, Leonardo Costa de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; BR; Programa de Pós-graduação em Engenharia Elétrica; Engenharias; UFU
• Palavras-chave em Português: Motor de indução; Relé inteligente; Proteção digital; Motores elétricos de indução; Relés elétricos; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: https://repositorio.ufu.br/handle/123456789/14400

This work describes a micro controlled-based device for over current protection and online monitoring of induction motor operation, able to replace with some advantages the traditional over current thermal relays. It allows real time monitoring of induction machine currents and over current protection, with programmable current x time characteristic. The typical current x time thermal relay curve can be easily programmed in this device and both the curve and setting points of operation can be altered online with the motor in operation. The device has a network communication interface for remote control and operation monitoring in a remote PC. Due to the programmable characteristic, the hardware can be used for different ranges of motor sizes and rated powers. The work shows details of design and programming, and presents experimental results obtained with a prototype developed in laboratory.