【正文】 KVA； Se— 變壓器額定容量； Ur%— 變壓器額定負(fù)荷時，電阻壓降百分?jǐn)?shù)； Ux％ — 變壓器額定負(fù)荷時，電抗壓降百分?jǐn)?shù)。負(fù)荷計算偏大，則造成設(shè)備的浪費和投資的增大。 礦井采用三路 6kv 電源供電，一、二路電源來自淮北礦務(wù) 局石臺煤礦 35kv 變電所兩段不同的 6kv母線 ，線路長度均為 。 （一）、設(shè)計依據(jù) 中華人民共和國建設(shè)部及國家技術(shù)監(jiān)督局聯(lián)合發(fā)布的《礦山電力設(shè)計規(guī)范》。通過對永固煤礦 3414工作面 的負(fù)荷統(tǒng)計，用需用系數(shù)法進行負(fù)荷計算 ，為電氣設(shè)備的選擇及校驗提供了數(shù)據(jù)。 （三）礦井基礎(chǔ)資料 永固煤礦位于安徽省蕭縣境內(nèi)，行政區(qū)劃屬永固鎮(zhèn)，即閘河煤田中部：在蕭縣東南16 km。 礦井抽風(fēng)機、主提升機、主排水泵等重要負(fù)荷均采用雙回路供電。該公式對用電設(shè)備組、車間變電站乃至一個企業(yè)變電站的負(fù)荷計算都適用。 取 cosψ pj=, sinψ pj= Ur%= 220 010 ???edSP ? ? ? ? %%% 2222 ????? rdx UUU Δ UB％ =β (Ur% cosφpj+Ux ％ sinφpj) =（ ＋ ） = 100 %2 BeB UUU ??? =690 ? b、干線電纜的電壓損失Δ U 干 10 干線電纜中的電壓損失值的計算 Δ UG= GeGxe SULKP ? 310?? 式中： SG干線電纜導(dǎo)線截面， mm2； LG干線 電纜長度， m； ΣPe 電纜負(fù)荷的總額定功率， KW； γ 電導(dǎo)率 m/Ωmm 2。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。 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。 Have declared the end of the encounter that haven39。與其一味顧慮重重，不如從局外人的角度看待決策之事。屏住呼吸，生活停滯；呼出呼吸，更多新奇與經(jīng)歷又將拉開序幕。也曾經(jīng)好像已經(jīng)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。s actions. CSKA said they were surprised and disappointed by Toure39。在畢業(yè)設(shè)計期間，他給予了我極大的指導(dǎo)和幫助， 為我指明了方向， 他那認(rèn)真負(fù)責(zé)的工作作風(fēng)、 誨人不倦的精神風(fēng)范、嚴(yán)謹(jǐn)求實的治學(xué)態(tài)度給了我很大的鼓舞和激勵。 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。負(fù)荷計算過小，則依此選用的設(shè)備和載流部分有過熱的危險，輕者使線路和配電設(shè)備壽命降低，重者影響供電系統(tǒng)的安全運行。設(shè)計生產(chǎn)能力 9 萬噸 /年， 2022 年經(jīng)安徽省經(jīng)濟委員會及安徽省煤炭安全監(jiān)察局核定生產(chǎn)能力為 18萬噸 /年。按安裝地點、運行環(huán)境和使用要求對電氣設(shè)備的規(guī)格型號進行選擇，并對它們進行動穩(wěn)定和熱穩(wěn)定校驗。 根據(jù)煤礦供電系統(tǒng)的特點，制定了 3414工作面 的供電方案。北以 18 勘探線為界，南至 12 勘探線。井下采掘工作面供電電壓為 660V，采掘工作面采用 專用線路供電，局扇另設(shè)一條備用電源，工作面主局扇電源和備用局扇電源分別由不同的變壓器供電。對不同性質(zhì)的用電設(shè)備、不同車間或企業(yè)的需用系數(shù)值，經(jīng)過幾十年的統(tǒng)計和積累，數(shù)值比較完整和準(zhǔn)確 ，查取方便，因而為我國設(shè)計部門廣泛采用。 Δ UG= GeGxe SULKP ? 310??= 3 ??? ??? c、支線電纜的電壓損失Δ U支 支線電纜中的電壓損失值的計算 Δ UZ= dZe ZfZ SU LKP ??310? 式中： SZ— 電纜導(dǎo)線截面， mm2； LZ— 支線電纜長度， m； PZ— 電動機的額定功率，KW； Kf— 負(fù)荷率； ηd — 電動機效率。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as a damagesbased agreement. In England and Wales, your solicitor can39。 Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isn39。t start planning... Those years, those days of do, finally, like youth, will end in our life. 此刻，天空是陰暗的，空氣里有著剛下過雨之后的清新因子。 From: The supersonic descent could happen as early as Sunda. The weatheThe balloon will slowly drift to the edge of space at 120,000 feet (Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform. Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he39。如果我們一味逃避生活中的悲傷，悲傷只會變得更強 烈更真實 —— 悲傷原本只是稍縱即逝的情緒，我們卻固執(zhí)地耿耿于懷 By utilizing our breath we soften our experiences. If we dam them up, our lives will stagnate, but when we keep them flowing, we allow more newness and greater experiences to 。想要的，不想要的， 界限明確，好像沒有什么可以撼動自己。s governing body, has also ordered an immediate investigation into the referee39。 b查表得兩相短路電流為： I（ 2） d =3380A ② 材料道 最后一臺設(shè)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 510米 50mm2（ 折算長度為 660米） b查表得兩相短路電流