access icon openaccess Analysis of the coupling effects on main feeder in more electrical aircraft

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 02/02/2018, Accepted 02/02/2018, Published 05/02/2018

Isolation distance is an important consideration in aircraft wiring for coupling effect. according to electrical wiring interconnect system (EWIS) isolation requirements specified in SAE 50881D and airworthiness regulations CCAR 25.1707, explicit isolation distances are not specified. Aircraft wiring is complex or diverse. In order to evaluate coupling effects between the main feeder and signal wire, the three-phase-seven-wire main feeder with 230 VAC, 250 kVA was chosen as the simulation object. The impedance model of three-phase feeder is given with which the coupling effects can be analysed in theory at first. The coupling voltage amplitude is the main evaluation index. In the simulation process, the following cases are chosen: different distances between signal wire and main feeder; signal wire lies in the different phase of the main feeder; isolation distance analysis with types of loads; there exits arc faults on main feeder. Based on the analysis of the simulation results, proposed methods to reduce the coupling effects between wires are given. Through the work in this study, it has some guiding significance for wire or cable laying.

Inspec keywords: electromagnetic coupling; aircraft; wires (electric); arcs (electric); aircraft power systems; wiring

Other keywords: electrical aircraft; aircraft wiring; isolation distance analysis; EWIS isolation requirements; impedance model; airworthiness regulations; coupling effect; SAE 50881D; three-phase-seven-wire main feeder; signal wire; arc faults; cable laying; coupling voltage amplitude; apparent power 250.0 kVA; CCAR 25.1707; simulation object; evaluation index

Subjects: Wires and cables; Aerospace power systems; Mechanical components; Engineering materials; Aerospace industry

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