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http://dx.doi.org/10.5139/JKSAS.2017.45.1.71

A Study on Quality Improvement of Electrical Master Box for KUH  

Kim, Young Mok (Defesne Agency for Technology and Quality)
Jun, Byung Kyu (Defesne Agency for Technology and Quality)
Jeong, Sang Gyu (Defesne Agency for Technology and Quality)
Lee, Joo Hyung (Korea Aerospace Industries)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.45, no.1, 2017 , pp. 71-78 More about this Journal
Abstract
The electrical power system of Korean Utility Helicopter(KUH) is designed as a dual control system to enhance the system safety of aircraft and each system is installed separately at left and right of the aircraft. The system is composed of 2 AC generators, 1 APU generator, 2 Transformer Rectifier Units(TRU), AC/DC Electrical Master Box(AC/DC EMB). The AC/DC EMB, consists of 2 AC EMB and 2 DC EMB, is essential equipment which supply and distribute electric power to the aviation electronics and electrical equipment of KUH. There were defects caused by internal short circuit in AC EMB during the first production phase of the KUH. This paper describes the analysis of the defects, troubleshooting process, root cause, and the solution by design change.
Keywords
KUH; Power system; AC EMB; DC EMB; TRU;
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  • Reference
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