CENTRO DE CIÊNCIAS EXATAS E TECNOLÓGICAS
ENGENHARIA ELÉTRICA
BÁRBARA VOLTARELLI

ESTUDO DE CASO: ESTUDO DE PROTEÇÃO E
SELETIVIDADE CONTRA SOBRECORRENTE EM UMA
SUBESTAÇÃO INDUSTRIAL 13,8 KV EM ACORDO COM AS
NORMAS ABNT E NTC.

Londrina
2013

BÁRBARA VOLTARELLI

ESTUDO DE CASO: ESTUDO DE PROTEÇÃO E
SELETIVIDADE CONTRA SOBRECORRENTE EM UMA
SUBESTAÇÃO INDUSTRIAL 13,8 KV EM ACORDO COM AS
NORMAS ABNT E NTC.

Trabalho de Conclusão de Curso apresentado à
Universidade Norte do Paraná - UNOPAR, como requisito parcial para a obtenção do título de Bacharel em Engenharia Elétrica.
Orientador: Prof. Msc. Marcelo Rodrigues

Londrina
2013

BÁRBARA VOLTARELLI

ESTUDO DE CASO: ESTUDO DE PROTEÇÃO E
SELETIVIDADE CONTRA …exibir mais conteúdo…

Case Study: Study of protection and selectivity against overcurrent of an industrial substation 13,8 kV complying with standards ABNT and NTC. 2013. 54 páginas. Trabalho de Conclusão de Curso (Graduação em
Engenharia Elétrica) – Centro de Ciências Exatas e Tecnológicas, Universidade
Norte do Paraná, Londrina, 2013.
ABSTRACT

The developed work presents a case study of a step-down substation 13,8kV/380V which suffered an increase in load, which required new adjustments, parameters and sizing of its equipment, all complying with standards (ABNT, IEC, ANSI and NCT), aiming at protection, coordination and selectivity of the system. As protection, one secondary overcurrent timed and instantaneous relay was utilized. Through the values of short-circuit currents, obtained by calculation, the equipment involved was dimensioned, set the relay from their operation curves and obtained values of maximal short-circuit currents in different points of installation, being able to define the appropriate equipment to support the conditions to be submitted in system, so as to be insightful and quickly stop abnormal currents, acting in a selective manner in eliminating the irregular conditions causing the event. For the protection adjustment, the monophasic and three-phase short-circuit currents were considered. The work brings explanations about methods of calculations, equipment definitions, and types of substations, design standards, calculations, drafting and