电子课件-《电工英语(第三版)》-A01-3750-电工英语电子课件unit3.ppt

1、ELECTRICAL ENGLISH英语英语电工Unit 1 Job and WorkplaceUnit 2 Electrical Tools and MaterialsUnit 3 House WiringUnit 4 Measuring InstrumentContents Unit 5 Motors and TransformersLesson7 Reading DiagramsLesson 8 Installing Entrance EquipmentLesson 9 Installing CablesUnit 3 House WiringLesson7 Reading Diagram

2、sGoal Learn useful expressions for using wiring planLook and Study DialogueReadingFurther StudyWords and Phrases Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study73Words and PhrasesA.Look up the phrases below in a dictionary.Match the symbols with the phrases.Unit 3 Lesson 4 Look and Stu

3、dy Dialogue Reading Further Study73Words and PhrasesA.Look up the phrases below in a dictionary.Match the symbols with the phrases.1 three wires;2 ceiling lamp fixture 3 double-pole switch;4 wiring concealed in ceiling or wall;5 special-purpose connection,tv;6 three-way switch;7 duplex receptacle ou

4、tlet;wiring concealed in ceiling or wallduplex receptacle outletspecial-purpose connection,tvThree wiresdouble-pole switchthree-way switchceiling lamp fixture Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study73Words and PhrasesB.Look up the words and phrases below in a dictionary.Fill in

5、 the blanks with both Chinese and English answers according to the pictures.consumer unit；MCB；RCD；dwelling；wall outlet；architect；circuit diagram；lighting fixture；electrical symbol1._2._3._RCD漏电保护器MCB微型断路器consumer unit用户电箱 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study73Words and Phras

6、esB.Look up the words and phrases below in a dictionary.Fill in the blanks with both Chinese and English answers according to the pictures.consumer unit；MCB；RCD；dwelling；wall outlet；architect；circuit diagram；lighting fixture；electrical symbol4._5._6._architect建筑师dwelling住处wall outlet墙壁插座 Unit 3 Less

7、on 4 Look and Study Dialogue Reading Further Study73Words and PhrasesB.Look up the words and phrases below in a dictionary.Fill in the blanks with both Chinese and English answers according to the pictures.consumer unit；MCB；RCD；dwelling；wall outlet；architect；circuit diagram；lighting fixture；electric

8、al symbol7._8._9._circuit diagram电路图electrical symbol电气符号lighting fixture灯具 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study73Words and PhrasesJim（A）初次实际安装总配电箱，向Carole（B）请教安装要求的问题。A:Hi,Carole.Good afternoon!B:Hey,Jim!Good afternoon.Whats the problem?A:I have something I need to discuss

9、with you.Do you understand the installation instructions of consumer unit thoroughly?B:Almost.A:Why must the installation height be from 0.45m to 1.2m above the floor level?Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study73Words and PhrasesJim（A）初次实际安装总配电箱，向Carole（B）请教安装要求的问题。B:This pro

10、vision is made for people to gain access to the facilities.The equipments include the consumer unit,as it contains devices such as MCB and RCD that may need operation or resetting by the user of the dwelling.A:Oh,I see.B:Is it necessary to have RCD protection?A:Yes.It protects the circuits supplying

11、 of socket outlets and the cables buried in the wall.B:OK,I see.Thanks a lot.Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study73Words and PhrasesA.Listen to the dialogue again and answer the questions.1.The installation height of consumer unit is made for people to gain access to .2.prot

12、ects the circuits supplying of socket outlets and the cables buried in the wall.facilitiesRCD Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study73Words and PhrasesB.Reorder the letters with your partner.LettersWordsset re ket c so pp su ly s ac ces tec pro t cir cui t n con tai er consum

13、consumerresetsocketsupplyaccessprotectcircuitcontain Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study73Words and Phrases布线平面图布线平面图A necessary part of any set of drawing for construction of a building is the wiring plan.Architects,electrical designers,and contractors use floor-plan diagr

14、ams to locate components of the buildings electrical system,such as receptacle outlets,switches,lighting fixtures,and other wiring devices.These devices and wiring arrangements are represented by means of symbols.The living-room plan shows two three-way switching arrangement.In one Unit 3 Lesson 4 L

15、ook and Study Dialogue Reading Further Study73Words and Phrases布线平面图布线平面图arrangement,a ceiling outlet is switched from two door locations.Similarly,two receptacle outlets on the north wall are switched from two separate locations.The connection between switch and ceiling outlet is drawn with a mediu

16、m weight solid line,indicating that the connection(conduit or cable)is to be concealed in the wall or ceiling above.The cross lines indicate the conductors in the conduit or cable.If cross lines are omitted,two wires are understood to be in the connection.Unit 3 Lesson 4 Look and Study Dialogue Read

17、ing Further Study73Words and PhrasesA.Match the English with the Chinese.Draw lines.B.Choose the best answer1.Electrical designers use floor-plan diagrams to components of the buildings electrical system.A.buy;B.repair;C.locate;D.install2.Electrical devices and wiring arrangements on floor-plan diag

18、rams are represented by means of .A.line;B.picture;C.symbol;D.photo3.The cross lines on diagrams indicate .A.the conductors.B.the conduits;C.The cables;D.the conductors in the conduit or cablea set of drawings 三路开关a floor-plan 一套图纸by means of words 建筑平面图a three-way switching 通过语言CCD Unit 3 Lesson 4

19、Look and Study Dialogue Reading Further Study73Words and PhrasesC.Learn the important grammar and phrase in the text.1.such as 例如Architects electrical designers,and contractors use floor-plan diagrams to locate components of the buildings electrical system,such as receptacle outlets,switches,lightin

20、g fixtures,and other wiring devices.建筑师、电气工程设计师和承建商使用建筑平面图规划建筑电气系统中各设备位置，如插座插口、开关、灯具及其他布线设备。练习：它可以广泛应用于家电设备、电子产品、汽车等行业。提示：apply,industry,motorcycle英文：2.by means of用，依靠These devices and wiring arrangements are represented by means of symbols.这些设备和线缆的布置通过符号表示出来。练习：公司通过二维线路图控制电气系统。提示：control,2D line英文：

21、It can be applied in various industries,such as household appliances,electronics,motorcycle,automobile.Companies control an electric system by means of 2D line diagrams.Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study73Words and PhrasesThree Way Switches.THREE WAY SWITCHES are so called

22、 because they have three connected（连接的）points inside them.If two 3-way switches are arranged,the lights can be turned on or off at either end of the circuit.CIRCUIT DIAGRAM below shows the layout(布局)of one of the off positions.You can see that the circuit is open and so no current can flow.If the po

23、sitions of both switches were reversed（反置）then it would still be an open circuit（开路）.There are also two ways for the circuit to be closed:both switches in the up position or both switches in the down position.Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study73Words and Phrasesconsumer kn

24、sju:m n.消费者，用户thoroughly rli adv.彻底地provision prvin n.规定,条款,条件access kses n.进入facility fsiliti n.设施，设备contain kntein vt.包含operation,prein n.操作reset,ri:set vt.重置dwelling dweli n.住处protection prutekn n.保护protect prutekt vt.保护circuit s:kit n.电路，回路supply splai vt.供给，提供socket skit n.插孔，插座outlet autlet n.

25、出口socket outlet插座bury beri vt.掩埋,埋藏set set n.一套drawing dr:i n.图画construction knstrkn n.建造,建设;建筑业；建造物,建筑物；plan pln n.平面图architect:kitekt n.建筑师designer dizain n.设计师floor-plan建筑平面图locate lukeit vt.定位 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study73Words and Phrasescomponent kmpunnt n.成分，

26、组件receptacle riseptkl n.插座fixture fikst n.固定装置arrangement reindmnt n.布置symbol simbl n.符号ceiling si:li n.天花板locations lukens n.位置，地点similarly similli adv.同样地separate sepreit adj.单独的，分开的weight weit n.重量indicate indikeit vt.表明，象征；指示conceal knsi:l vt.隐藏cross kr:s adj.交叉的omit umit vt.省略 consumer unit总配（用

27、户）电箱floor level 楼面gain access to接近，可以使用MCB(Miniature Circuit Breaker)小型断路器RCD(residual current device)漏电保护器socket outlet插座a set of一套floor plan建筑平面图lighting fixture 灯具by means of通过，借助于three-way switching 三路开关Lesson 8 Installing Entrance EquipmentGoal Learn useful expressions for installing entrance d

28、evicesLook and Study DialogueReadingFurther StudyWords and Phrases Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and PhrasesA.Look up the phrases below in a dictionary.Fill the blanks with the right numbers.weather head;service entrance cable;power pole;main service panel;elec

29、tric meter;meter box123456 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and PhrasesB.Look up the words and phrases below in a dictionary.Fill in the blanks with both Chinese and English answers according to the pictures.voltage tester;continuity tester;fish tape；transformer;g

30、round rod;breaker box1._2._3._fish tape穿线钢带continuity tester断路探查器voltage tester电压检测器 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and PhrasesB.Look up the words and phrases below in a dictionary.Fill in the blanks with both Chinese and English answers according to the picture

31、s.voltage tester;continuity tester;fish tape；transformer;ground rod;breaker box4._5._8._transformer变压器breaker box开关盒ground rod接地棒 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and Phrases两个电工要进行室内布线工作，开始检查工具和材料准备情况。A:I think Ive got all the wiring materials and tools.B:Good,th

32、e materials are ready,but wed better check the tools again to make sure.We mustnt forget anything;otherwise the time limit for the project will be delayed.You tell me what weve got and Ill make sure weve got it.A:OK.Weve got two household toolboxes.B:Right,weve got them.Now whats the next tool?A:A 3

33、001 voltage continuity tester.Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and Phrases两个电工要进行室内布线工作，开始检查工具和材料准备情况。B:Weve certainly got the tester.Its so special you cant miss it!A:The next tool is a wire stripper.B:Right,weve got it.And the last one?A:The last one is a fish t

34、ape.B:Ok,weve got that,too.Now we can get started.Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and PhrasesA.Listen to the dialogue again and circle Yes or No.1.They are checking the tools for wiring.Yes No2.They check the tools again because the time limit for the project has

35、 been delayed.Yes No3.They miss a continuity tester.Yes NoYesNoNo Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and PhrasesB.Reorder the letters with your partner.LettersWordslay de t li mi box tool er strip striperdelaylimittoolbox Unit 3 Lesson 4 Look and Study Dialogue Read

36、ing Further Study83Words and Phrases进户装置安装进户装置安装The power companys overhead service lines feed the transformer to step down the voltage to feed your home.It then travels to the weather head which is attached to a conduit connected to a meter box.Two 120 volt wires and a grounded neutral wire feed th

37、e meter through the weather head.The power company is responsible for power to the meter and the homeowner takes it from there.Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and Phrases进户装置安装进户装置安装The electric meter is attached to the service entrance pipe and is usually attach

38、ed to the side of your house.It may be attached to the power companys power pole also.It can be fed overhead or underground.The service must be connected to a ground rod outside the house.The electrical panel,breaker box,fuse box or service panel is the next device in line.This panels job is to dist

39、ribute power throughout your home and disconnect power from the incoming feed.The power comes in to a main breaker,individual breakers then is distributed to individual circuits(called branch circuits)throughout your home.Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and Phras

40、esA.Match the English with the Chinese.Draw lines.step down the voltage 分配功率branch circuit 降低电压grounded neutral wire 总开关distribute power 接地的中性线main breaker 支路 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and PhrasesB.Choose the best answer1.to step down the voltage to feed yo

41、ur home.2.wires and a grounded neutral wire feed the meter.3.The electric meter attached to .4.The service must be connected to outside the house.5.distribute power throughout your home.The power companys overhead service lines feed the transformerTwo 120 voltthe service entrance pipea ground rod Th

42、e panels job is to Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and PhrasesC.Learn the important grammar and phrase in the text.1.feed A（with B）/feed B（into A）供给、供应The power companys overhead service lines feed the transformer to step down the voltage to feed your home.电力公司的架

43、空线路输送电能至变压器，再降压至住宅用电电压。练习：the electricity line is fed with power through an underground cable./Power is fed into the electricity line through an underground cable.中文：2.be attached to把固定，把附（在上）The electric meter is attached to the service entrance pipe电表安装在进户端的的配管上练习：电源插头需要由电气技术人员安装在机器上。提示：plug,techn

44、icians英文：电线经过地下供电。A power plug has to be attached to the machine by electric technicians.Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and PhrasesInstalling An Electrical Distribution Sub-PanelThe primary purpose of an electrical sub-panel is to provide you with additional ele

45、ctrical circuits.It does not change the total amount of power available to the home.The primary difference between a main electrical distribution panel and a sub-panel is in the main disconnector(独立的隔离开关).Modern electrical distribution panels have a main disconnector circuit breaker built into them.

46、Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and Phrasesotherwise waiz adv.否则limit limit n.界限，限度delay dilei vi.延期，耽搁toolbox tu:l,bks n.工具箱continuity,kntinju:iti n.连续性tester test n.试验装置，检测器stripper strip n.剥离器tape teip n.带子overhead uvhed adj.高架的feed fi:d vt.供给transformer trnsf

47、:m n.变压器attach tt vt.附着connect knekt vt.连接meter mi:t n.仪表volt vlt n.伏特grounded graundid adj.接地的neutral nju:trl adj.中立的，中性的homeowner hum,un n.私房屋主entrance entrns n.入口pipe paip n.管pole pul n.杆rod rd n.棒breaker breik n.断路器distribute distribju:t vt.分配throughout ru:aut prep.遍及disconnect,disknekt vt.断开inc

48、oming in,kmi adj.引入的main mein adj.主要的individual,individjul adj.单独的branch br:nt n.分支 Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study83Words and Phrasesmake sure确定time limit期限continuity tester断路探查器wire stripper剥线器fish tape穿线钢带get started行动起来step down逐步减低weather head防水罩meter box 表箱service

49、 entrance总进户端ground rod接地棒power pole电线杆breaker box开关盒fuse box保险丝盒service panel配电箱branch circuit 支路Lesson 9 Installing CablesGoal Learn useful expression for installing cablesLook and Study DialogueReadingFurther StudyWords and Phrases Unit 3 Lesson 4 Look and Study Dialogue Reading Further Study93Wo

50、rds and PhrasesLook up the words and phrases below in a dictionary.Fill in the blanks with both Chinese and English answers according to the pictures.1._2._3._kitchenettewater heatercable racewaycable raceway电缆通道kitchenette小厨房water heater热水器 Unit 3 Lesson 4 Look and Study Dialogue Reading Further St