電工作業(yè)

目錄項(xiàng)目一電氣安全基本知識........................................................................................1任務(wù)1.1觸電急救................................................................................................11.1.1觸電與防觸電措施..................................................................................
11.1.2防止觸電的技術(shù)措施..............................................................................81.1.3觸電急救...............................................................................................91.1.4安全用電意義.....................................................................................
121.1.5安全用電標(biāo)志.....................................................................................13任務(wù)1.2電氣火災(zāi)的撲救...................................................................................151.2.1電氣火災(zāi)和爆炸的原因.......................................................................
151.2.2電氣火災(zāi)撲救方法..............................................................................16任務(wù)1.3防雷和接地裝置的運(yùn)行與維護(hù)..............................................................191.3.1雷電現(xiàn)象及危害.................................................................................
191.3.2防雷裝置...............................................................................................211.3.3防雷保護(hù).............................................................................................261.3.4接地裝置的運(yùn)行與維護(hù)........................................................................
291.3.5低壓配電系統(tǒng)的等電位連接..................................................................33項(xiàng)目二變壓器的使用與維護(hù)..................................................................................34任務(wù)2.1變壓器認(rèn)知..........................................................................................
342.1.1變壓器的結(jié)構(gòu)........................................................................................342.1.2變壓器的分類......................................................................................372.1.3變壓器的工作原理...............................................................................
382.1.4變壓器的銘牌數(shù)據(jù)...............................................................................432.1.5單相變壓器的繞組極性及判定...........................................................452.1.6變壓器空載試驗(yàn)和短路試驗(yàn).................................................................
462.1.7變壓器的運(yùn)行特性.................................................................................482.1.8變壓器的損耗、效率及效率特性..........................................................49任務(wù)2.2常用變壓器的使用與維護(hù).....................................................................
512.2.1互感器.................................................................................................512.2.2自耦變壓器...........................................................................................552.2.3三相變壓器..........................................................................................
552.2.4變壓器的維護(hù)及故障分析處理..............................................................58項(xiàng)目三電動機(jī)的使用與維護(hù)..................................................................................64任務(wù)3.1三相異步電動機(jī)的運(yùn)行與維護(hù)..............................................................
643.1.1電動機(jī)的種類......................................................................................643.1.2.三相異步電動機(jī)的結(jié)構(gòu).......................................................................653.1.3三相異步電動機(jī)銘牌上的數(shù)據(jù)..............................................................
693.1.4三相異步電動機(jī)的工作原理..................................................................713.1.5三相異步電動機(jī)的運(yùn)行原理.................................................................753.1.6三相異步電動機(jī)的運(yùn)行特性.................................................................
763.1.7三相電動機(jī)的工作特性........................................................................813.1.9三相感應(yīng)電動機(jī)的調(diào)速........................................................................853.1.10三相異步電動機(jī)的制動......................................................................
87任務(wù)3.2直流電動機(jī)使用與維護(hù).........................................................................913.2.1直流電機(jī)的基本工作原理....................................................................913.2.3直流電機(jī)的額定值及銘牌................................................................
953.2.4直流電機(jī)的電動勢、轉(zhuǎn)矩和功率........................................................973.2.5直流電動機(jī)的工作特性.........................................................993.2.6直流電動機(jī)的起動、調(diào)速與制動........................................................102項(xiàng)目四低壓電器的運(yùn)行與維護(hù).............................................................................
108任務(wù)4.1接觸器的使用與維護(hù)...........................................................................1084.1.1低壓電器的基本知識..........................................................................1084.1.2接觸器...............................................................................................
110任務(wù)4.2繼電器的使用與維護(hù)...........................................................................1184.2.1繼電器...............................................................................................1184.2.2常用電磁式繼電器..............................................................................
119任務(wù)4.3低壓開關(guān)電器的使用與維護(hù)................................................................1284.3.1低壓刀開關(guān)........................................................................................1294.3.2低壓斷路器(自動空氣開關(guān))...............................................................
1314.3.3轉(zhuǎn)換開關(guān)...........................................................................................132任務(wù)4.4熔斷器的使用與維護(hù)...........................................................................1344.4.1熔斷器的性能......................................................................................
1344.4.2熔斷器的種類及用途...........................................................................1344.4.3熔斷器的安秒特性.............................................................................1364.4.4熔斷器的選擇....................................................................................
136任務(wù)4.5主令電器的使用與維護(hù).........................................................................1374.5.1控制按鈕...........................................................................................1374.5.2行程開關(guān)...........................................................................................
139項(xiàng)目五電氣線路運(yùn)行與維護(hù)................................................................................142任務(wù)5.1電動機(jī)基本控制電路的繪制................................................................1425.1.1常用的電氣元件圖形和文字符號........................................................
1425.1.2電氣控制線路圖的繪制原則..............................................................145任務(wù)5.2三相異步電動機(jī)直接起動控制線路的運(yùn)行與維護(hù).................................1485.2.1點(diǎn)動控制線路的運(yùn)行與維護(hù)................................................................1485.2.2自鎖控制線路的運(yùn)行與維護(hù).................................................................
1505.2.3多地控制線路的運(yùn)行與維護(hù).................................................................1525.2.4正反轉(zhuǎn)控制線路的運(yùn)行與維護(hù).............................................................1525.2.5三相異步電動機(jī)順序控制線路的運(yùn)行與維護(hù).......................................154任務(wù)5.3三相異步電動機(jī)降壓起動控制線路的運(yùn)行與維護(hù)...................................
1585.3.1串電阻降壓起動控制線路的運(yùn)行與維護(hù)...............................................1585.3.2星-角降壓起動控制線路的運(yùn)行與維護(hù).................................................1595.3.3自耦變壓器降壓起動控制線路的運(yùn)行與維護(hù)........................................159項(xiàng)目六電力電容器運(yùn)行與維護(hù).............................................................................
161任務(wù)6.1電容器認(rèn)知.........................................................................................1616.1.1并聯(lián)電容器的結(jié)構(gòu)和型號...................................................................1616.1.2并聯(lián)電容器的作用.........................................................................
1626.1.3無功補(bǔ)償?shù)幕驹?.........................................................................1626.1.4電容器的選擇....................................................................................163任務(wù)6.2電容器的運(yùn)行與維護(hù)...........................................................................
1636.2.1電容器的安裝....................................................................................1636.2.2電容器的接線....................................................................................1656.2.3電容器的安全運(yùn)行.............................................................................
1656.2.4電容器的保護(hù)....................................................................................1656.2.5電容器的投入和退出..........................................................................1656.2.6電容器的操作....................................................................................
1666.2.7電容器運(yùn)行中的故障處理...................................................................166