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1、.電氣設(shè)備與電纜選擇規(guī)范一、開(kāi)關(guān)的選擇(一)一般要求:開(kāi)關(guān)的短路保護(hù)應(yīng)在短路電流對(duì)導(dǎo)體和連接件產(chǎn)生的熱效應(yīng)和機(jī)械力造成危害之前分?jǐn)嘣撾娏?。開(kāi)關(guān)的過(guò)負(fù)載保護(hù)應(yīng)在過(guò)負(fù)載電流引起的導(dǎo)體溫升對(duì)導(dǎo)體的絕緣、接頭、端子或周圍的物質(zhì)造成危害之前分?jǐn)嘣撨^(guò)負(fù)載電流。(二)短路保護(hù)應(yīng)滿足的條件:1.分?jǐn)嗄芰Σ粦?yīng)小于保護(hù)電器安裝處的預(yù)期短路電流。2.應(yīng)在短路電流使導(dǎo)體達(dá)到允許的極限溫度之前分?jǐn)嘣摱搪冯娏鳌?.保護(hù)電動(dòng)機(jī)時(shí)必須滿足電動(dòng)機(jī)的啟動(dòng)電流。(三)過(guò)負(fù)載保護(hù)應(yīng)滿足的條件:1.保護(hù)電動(dòng)機(jī)時(shí)應(yīng)在電動(dòng)機(jī)電流超過(guò)額定電流時(shí)間在
2、電動(dòng)機(jī)使用壽命造成嚴(yán)重影響之前分?jǐn)嚯妱?dòng)機(jī)電源。2.對(duì)于突然斷電比過(guò)負(fù)載造成的損失更大的線路,如消防水泵之類的負(fù)荷,其過(guò)負(fù)載保護(hù)應(yīng)作用于信號(hào)而不應(yīng)作用于切斷電路。(四)接地故障保護(hù):1.當(dāng)發(fā)生帶電導(dǎo)體與外露可導(dǎo)電部分、裝置外可導(dǎo)電部分、PE線、PEN線、大地等之間的接地故障時(shí),保護(hù)電器必須自動(dòng)切斷該故障電路,以防止人身間接電擊、電氣火災(zāi)等事故。(五)常用電動(dòng)機(jī)的額定參數(shù)表:Y系列型號(hào)額定功率額定電流轉(zhuǎn)速堵轉(zhuǎn)轉(zhuǎn)矩堵轉(zhuǎn)電流最大轉(zhuǎn)矩重量額定轉(zhuǎn)矩額定電流額定轉(zhuǎn)矩kWAr/min倍倍倍kgY80M1-20.751
3、.828302.26.52.317Y80M2-21.12.528302.27.02.318Y90S-21.53.428402.27.02.322..Y90L-22.24.828402.27.02.325Y100L-236.428802.27.02.334Y112M-248.228902.27.02.345Y132S1-25.511.129002.07.02.367Y132S2-27.51529002.07.02.372Y160M1-21121.829302.07.02.3115Y160M2-21529
4、.429302.07.02.3125Y160L-218.535.529302.07.02.2145Y180M-22242.229402.07.02.2173Y200L1-23056.929502.07.02.2232Y200L2-23769.829502.07.02.2250Y225M-2458429702.07.02.2312Y250M-25510329702.07.02.2387Y80M1-40.551.513902.46.02.317Y80M2-40.75213902.36.02.317Y90S
5、-41.12.714002.36.52.325Y90L-41.53.714002.36.52.326Y100L1-42.2514302.27.02.334Y100L2-436.814302.27.02.335Y112M-448.814402.27.02.347Y132S-45.511.614402.27.02.368Y132M-47.515.414402.27.02.379Y160M-41122.614602.27.02.3122Y160L-41530.314602.27.02.3142Y180M-4
6、18.535.914702.07.02.2174Y180L-42242.514702.07.02.2192Y200L-43056.814702.07.02.2253Y225S-43770.414801.97.02.2294Y225M-44584.214801.97.02.2327Y250M-45510314802.07.02.2381Y90S-60.752.39102.05.52.221Y90L-61.13.29102.05.52.224Y100L-61.549402.06.02.235Y112M-6
7、2.25.69402.06.02.245Y132S-637.29602.06.52.266Y132M1-649.49602.06.52.275Y132M2-65.512.69602.06.52.285Y160M-67.5179702.06.52.0116Y160L-61124.69702.06.52.0139Y180M-61531.49701.86.52.0182Y200L1-618.537.79701.86.52.0228Y200L2-62244.69801.86.52.0246Y225M-6305
8、9.59801.76.52.0294..Y250M-637729801.86.52.0395Y280S-64585.49801.86.52.0505Y280M-6551049801.86.52.056Y132S-82.25.87102.05.52.066Y132M-837.77102.05.52.076Y160M1-849.97202.06.02.0105Y160M2-85.513.37202.06.02.0115Y160L-87.517.77202.0