Cov qauv nqi rau kev tswj cov cables yog raws li nram no: Copper Nyhav × Copper Nqe=[(Wire Diameter ÷ 2)^2 × 3.14 × Number of Wires × 8.9 × Tam sim no Copper Nqe] + 10% Tus Nqi Ua Haujlwm.
Kev suav ntawm Control Cable Nqe Nqe:
Hla -sectional Area × 1.83=Copper Luj × Tam sim no Copper Nqe + Tus Nqi ntawm Armor ( Nyhav × 0.4 RMB/jin)=Tus Nqi Nqe + 10% Tus Nqi Ua Haujlwm.
Cable Nqe=Cov nqi tsim khoom + Cov Nqi Them Nqi + Cov se + Cov nuj nqis lag luam + nyiaj tau los.
Tus nqi tsim khoom siv=Tus nqi khoom siv × (1 + Cov Khoom Siv Khoom Siv Khoom Siv) (qhov "Tus Nqi Khoom" yog hais txog tus nqi theoretically xam).
Cov nuj nqis ruaj khov sib txawv nyob ntawm lub tuam txhab tshwj xeeb tab sis feem ntau suav nrog cov nqi tsim khoom, cov nyiaj hli ua haujlwm, cov nqi hluav taws xob, cov nqi kho thiab tu, cov nqi qis, nqi xauj tsev, thiab cov nqi tsheb thauj mus los.
Feem ntau ua txhaum ntawm cov kab hluav taws xob muaj xws li kev puas tsuaj rau cov khoom siv hluav taws xob, kev puas tsuaj hluav taws xob, cov dej noo nkag mus rau hauv cov rwb thaiv tsev, rwb thaiv tsev aging thiab deterioration, overvoltage, thiab cable overheating. Thaum ib qho ntawm cov lus hais saum toj no tshwm sim hauv ib txoj kab, lub hwj chim rau lub faulty cable yuav tsum raug txiav tam sim ntawd. Qhov chaw txhaum yuav tsum raug txheeb xyuas, thiab qhov txhaum nws tus kheej tau tshuaj xyuas thiab tshuaj xyuas. Tom qab ntawd, kev kho thiab kuaj tau ua tiav- hloov lossis tshem cov seem uas puas lawm raws li qhov tsim nyog- thiab cov khoom siv hluav taws xob tsuas yog rov qab los thaum qhov txhaum tau raug tshem tawm tag nrho.
