A Study on Improvement of the Specification and Operation Method for Fault Indicator of Distribution Automated Switch

배전자동화 개폐기의 Fault Indicator규격 및 운영기법 개선에 관한 연구

F.I(Fault Indicator) is equipped in automatic switchs for Distibution Automation System(DAS), and plays important role of providing the information for picking out a fault section. The restrictive sentence that F.I doesn't react for the inrush current is in the F.I specification. Nevertheless F.I has sometimes mal-functioned on the DAS in Kang-Dong branch office of KEPCO for latest 2 years. This Paper Proved the causes of the mal-function, and proposed the new F.I specification and operation methods against the mal-function causes.