Lissafin amintaccen bashin Busbar

Lissafin amintaccen bashin Busbar I4 = 2.45Id A cikin dabarar, I4 shine ƙarfin ɗaukar nauyi na yanzu da keɓaɓɓun ƙaramar tagulla mai lamba huɗu (A). Bayani: Kafa biyu da kuma sanduna na jan karfe na nufin cewa akwai banbanci tsakanin albarus ɗin da ke tsakanin firam ɗin biyu. Dangantaka dangantakar tsakanin

bas din a wani zazzabi na 40 ℃ da zazzabi na 25 ℃ shine: I40 = 0.85I25 A cikin dabara, I40 shine ɗaukar ƙarfin bas a halin yanzu a 40 ℃ (A); I25 shine karfin motar bas a halin yanzu a 25 ℃ (A). Dangantaka dangantakar dake tsakanin saukakkun hanyoyin zirga-zirgar tagulla na tagulla da alumuran alummuka na wannan ƙayyadaddun yanayi ɗaya ƙarƙashin yanayin zafin yanayi guda ɗaya: IAl = ICu / 1.3 A cikin dabara, ICu ita ce ke ɗaukar ƙarfin bas ɗin jan ƙarfe; IAl shine ɗaukar ƙarfin motar bas na yanzu. Misali, gwargwadon tsari da aka ambata a sama, ƙarfin ɗaukar nauyi na motar TMY100 × 10 ita ce: Zaɓi ɗaya: 100 × 18.5 = 1850A. Littafin bincike shine 1860A. Wannan bayanan ya samo asali ne daga 'Babban Ka'idodin Na'urar rarraba Wutan Lantarki' wanda Ma'aikatar Ruwa da Wutar Lantarki ta

Masana'antun Masana'antu ta Sin suka bayar. Biyu Layer: 2 (TMY100 × 10) ƙarfin ɗaukar halin yanzu shine: 1850 × 1.58 = 2923 (A); [Binciken littafin shine 2942A]; Yankunan uku: 3 (TMY100 × 10) ƙarfin ɗaukar halin yanzu shine: 1850 × 2 = 3700A [Duba littafin don 3780A] Dukkanin abubuwan lissafin da ke sama suna da kusanci ga bayanai a cikin littafin, kuma ana iya lissafta amintaccen bas ɗin gwargwadon tsarin da aka ambata a sama. Bayanin 3.4 (1) Tsarin ƙididdigar lissafin da ke sama ya dace da sandunan bas na 120 × 12 da ke ƙasa dalla-dalla. (2) Don gwargwadon ƙarfin halin yanzu na bas mai

fasalin jan karfe naushi kayan aiki, ana bada shawara don amfani da ƙarancin tattalin arziki na yanzu don ƙididdige. 4 effectsarfin zafi da warkarwa na rashin lafiyar basbars 4.1 Tasirin zafin bas 4.1.1 Tasirin zafi na mashin yana nufin tasirin zafi wanda mashigar motar zata iya ɗauka a ƙayyadaddun yanayi saboda yawan gudana na yanzu. A cikin juyawa kayan aiki da kayan sarrafawa, yana nufin ƙimar ɗan gajeran gajeran lokaci (IK) wanda basbar ke ɗauka tsakanin lokacin da aka ƙayyade a ƙayyadadden amfani da yanayin aikin. 4.1.2 eterayyade mafi ƙarancin sashin motar bas gwargwadon ƙimar lokacin gajeren lokaci tare da yanzu Dangane da tsari a cikin GB3906-1991 '3.6-40.5kV AC wanda aka kewaye shi da kayan aiki mai sarrafawa' [Shafi F]: S = (I / a) (t / θ) 1/2 don ƙayyade mafi ƙarancin ɓangaren giciye na tashar mota. A cikin dabara: S - imumaramar giciye mashaya, mm2; I-- wanda aka zana wa gajeran lokaci mai tsayayya da na yanzu, A; A-Matsalar abu, jan karfe 13, aluminium shine 8.5; T-- wanda aka yiwa gajeren zango, s; Θ-Yawan zazzabi (K), gabaɗaya 180K ga baƙi masu ɗaukar hoto da 215K na tsawon 4s. Don tsarin 31.5kA / 4S, ƙaramin yanki ɓangaren gwal mai shinge shine: S = (31500/13) × (4/215) 1/2 = 330 mm2 Dangantaka tsakanin ƙaramar giciye-yanki na bas ɗin aluminium da ƙaramar giciye-yanki yanki na motar jan ƙarfe ita ce: SAl = 1.62SCu A cikin dabara, SAl shine mafi girman yanki-yanki na bas ɗin aluminum; SCu shine ƙaramin yanki mai shinge na motar tagulla. Don tsarin 31.5kA / 4S, mafi ƙarancin yanki-yanki yanki na bas ɗin aluminum shine: SAl = 1.62 × 330 = 540 mm2 Dangane da tanade-tanaden 7.4.3 a cikin DL404-1997 'Ka'idodin Fasaha don ba da izini cikin Yanayin Maɗaukaki na Babban Voltage Switchgear', busar ƙasa da kuma ɓangaren ginin mai jagoran da aka haɗa da shi ya kamata su iya yin lissafin kashi 87% na ƙirar da aka kimanta kewaye watse halin yanzu na sunan allo. Minimumarancin yanki mai ƙarancin mashigin ƙasa a ƙarƙashin ɗan gajeren ikon da'irar tsarin (gajeren gajeren zango shine 4S).