| 摘要 |
FIELD: electrical engineering. ^ SUBSTANCE: method can be used tracking arcs in cable, in particular, in cable of aircraft board system. AC registered signal I(t) is read out discretely in time and angular function I(k) is determined by means of interpolation of definite number of read-out values y(k). Angular function I (k) models ac characteristic and is used for derivation of ac real-valued frequency omega. By comparing real-valued frequency omega with preset frequency omega' it is possible to judge on origin of alarm electric arc ISA, IGA. Then the warning signal Sarc can be generated if necessary. Device for arc tracking is integrated mainly in protective switch for aircraft board system, so it can be used for detecting and switching off electric arcs induced in cable of aircraft board system. ^ EFFECT: improved reliability of protection. ^ 17 cl, 6 dwg |
