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畢業(yè)論文-永固煤礦3414工作面供電設計(存儲版)

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【正文】 載流部分有過熱的危險,輕者使線路和配電設備壽命降低,重者影響供電系統(tǒng)的安全運行。 溜子道 電源: 表 41電力負荷統(tǒng)計表 設備名稱 規(guī)格型號 數量 備 用 電機功率( kW) 額定電壓( V) 皮帶 DST5022 3 66 660 皮帶 2 15 660 溜子 SGB420/22 1 22 660 溜子 SGB420/40 1 40 660 信號綜保 1 4 660 絞車 3 660 合計 7 (取需用系數 Kx= Cosφ = )則: P=Kx∑ p= =95kW 材料道 線路: 表 42電力負荷統(tǒng)計表 設備名稱 規(guī)格型號 數量 備 用 電機功率( kW) 額定電壓( V) 信號綜保 1 4 660 絞車 3 660 乳化泵 BRW125/ 2 1 37 660 潛水泵 BQS50/25/ 1 660 合計 (取需用系數 Kx= Cosφ = )則: P=Kx∑ p= = (三) 供電系統(tǒng)總電壓損失 : 溜子 道 電源: a、變壓器的電壓損失Δ U變 變壓器的電壓損失計算 Δ UB% =Σ SB /Se(Ur% cosφpj+Ux % sinφpj) 式中: Σ SB — 變壓器二次側實際負荷容量之和, KVA; Se— 變壓器額定容量; Ur%— 變壓器額定負荷時,電阻壓降百分數; Ux% — 變壓器額定負荷時,電抗壓降百分數。 9 即: Δ UY==660=96V Δ U=Δ UY=96V 故本線路的電纜選擇合格 ,能夠滿足運行要求。 Δ UZ= dZe ZfZ SULKP ?? 310?= 10510175 3 ???? ??? V d、總電壓損失Δ U Δ U=Δ UB+Δ UG+Δ UZ= + + = 660V供電系統(tǒng)中允許電壓損失 96V。在畢業(yè)設計期間,他給予了我極大的指導和幫助, 為我指明了方向, 他那認真負責的工作作風、 誨人不倦的精神風范、嚴謹求實的治學態(tài)度給了我很大的鼓舞和激勵。t charge you more than 35% of your pensation if you win the case. you39。s actions. CSKA said they were surprised and disappointed by Toure39。t really grow up, it seems is not so important。也曾經好像已經下定了決心去做某件事,但 更多的時候是最后又打起 了退堂鼓。突然 想到那件藍格子襯衫;那些被折成各種各樣形狀的信紙;那段從街角深巷伊始的友 誼;還有那場還沒有開始就宣告了終結的邂逅計劃 …… 那些年那些天的非做不可, 終于和青春一樣,都將在我們的人生中謝幕。屏住呼吸,生活停滯;呼出呼吸,更多新奇與經歷又將拉開序幕。ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。與其一味顧慮重重,不如從局外人的角度看待決策之事。 Whenever a painful situation arises in your life, try to embrace it instead of running away or trying to mask the hurt. When the sadness strikes, take a deep breath and lean into it. When we run away from sadness that’s unfolding in our lives, it gets stronger and more real. We take an emotion that’s fleeting and make it a solid event, instead of something that passes through us. 當生活中出現痛苦的事情時,別再逃跑或隱藏痛苦,試著擁抱它吧;當悲傷來襲時,試著深呼吸,然后直面它。 Have declared the end of the encounter that haven39。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個人的時候,自己的想法總是特別地清晰。 The end of our life, and can meet many things really do? 而窮盡我們的一生,又能遇到多少事情是真正地非做不可? During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。s 21 win. 18 Michel Platini, president of European football39。t agree with the disciplinary action your employer has taken against you your employer dismisses you and you think that you have been dismissed unfairly. For more informu, take advice from one of the anisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the anisations listed under Further help. ation about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。 b查表得兩相短路電流為: I( 2) d =3380A 工作面最后一臺設備處兩相短路電流 I( 2) d a電纜的實際長度:干線 150米 50mm2;支線電纜 780米 50mm2(折算長度為 930米) b查表得兩相短路電流為: I( 2) d =777A 變電所內 3414 溜子道 電源饋電開關( 66 號)饋電開關整定計算: ∑ Ie=124A 取變電所內饋電開關 過載整定值為: 160A 短路整定值為: 800A 靈敏效驗: K=3380/800=> 合格 工作面斷路開關整定計算: 已知:∑ Ie=124A Iz≤∑ Ie I( 2) d/8 Iz≥ 13 靈敏效驗: 777/8*80= 取斷路開關整定值為: 80A 表 61溜子道 電氣設備整定表 材料道 電源: ①斷路開關處的兩相短路電流 I( 2) d a電纜的實際長度: 150米 50mm2,折算長度為 150米。 取 cosψ pj=, sinψ pj= Ur%= 220 010 ???edSP
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