Masu ba da jan
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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, 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).
2020年8月3日星期一
bas mai fasa bututun mai(2)busar lankwasawa inji turkey
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
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