abb低壓vincent雷電保護的類型

1、1Furseroduction 介紹Pouring Molten Metal澆注熔融金屬Furseroduction 介紹SCasting殼牌鑄造Furseroduction 介紹The Foundry鑄工廠Furseroduction 介紹Furse the brand of Thomas & Betts 通貝公司NOTTINGHAM UKFurse 工廠-拿丁堡,英國Furseroduction 介紹TOTAL SOLUTION CONCEPT 全保護模式綜合的防護方案雷電保護的類型Presen ion - Protection against lightningDate October

2、Agenda for Greater China國際標準 62305:2006基本防雷要素 -1部分風(fēng)險評估 -2部分防雷與接地系統(tǒng) -3部分防雷器系類 -4部分2Furseroduction 介紹Conform Pros順應(yīng)步驟Furseroduction 介紹Conform Machine順應(yīng)機械Furseroduction 介紹Upcaster：Continuous Cast連續(xù)澆鑄Furseroduction 介紹Copproduction銅制品Furseroduction 介紹Concrete Earth Pit Production混凝土基坑生產(chǎn)Furseroduction 介紹F

3、inished Components成品組件3SPD Components AssemblySPD TestingFurseroduction 介紹防雷器- 檢驗IEC規(guī)定：采用10/350s 波形模擬直接雷擊Impulse Test Classification IEC 61643 11Type 1: 12.5ode 10/350s currentFurseroduction 介紹防雷器FRUSE防雷器殘壓測試- 檢驗Let-through Waveform Performance6 KV 1.2/50 S Voltage Test Waveform3 KA 8/20 S Current T

4、est WaveformLet-through must be RT62305:2 Risk Management 風(fēng)險評估管理方式Following primary risks (Rn) relate to corresponding types of loss (L) 基本方式來測定損失R1 risk of loss of human life人類生命R2 risk of loss of servito the public公共場所R3 risk of loss of cultural heritage古跡R4 risk of loss of economic value 經(jīng)濟財務(wù)8623

5、05-3 Direct Strike Protection 防雷與接地防雷級層部Faraday Cage 62305 principleBS 6651:1999過時(英國標準)BS EN /IEC62305:2006先進(國際標準)Two levels of lightning protection ordinary and high risk 兩級防護Four levels of Lightning Protection System (LPS)I-IV 分為四級防護Class防雷級層部Mesh Size (m x m)pacing (m)Rolling Sphere (m)I5 x 510

6、20II10 x 101030III15 x 151545IV20 x 20206062305-3 Direct Strike Protection 防雷與接地法拉第籠Follows Faraday Cage principle- Benjamin Frlin4 classes of structural LP 分為四級防護2 types of earthing arrangements兩方面（接地網(wǎng)絡(luò)）focus on importance of equipotential bonding聯(lián)合接地（并聯(lián)至同一接地匯流排上）現(xiàn)代雷電保護encourages use of natural met

7、alwork的發(fā)明者1706-1790使用接地點鋼筋連接62305-3 Direct Strike Protection 防雷與接地雷導(dǎo)致建BSEN 62305-3 Physical damage to筑物損壞structures and life hazard和生命危險性Relates directly to major part 根據(jù)標準 of BS6651 Year of1992 and 199962305-3 Direct Strike Protection 防雷與接地防雷與接地廠品系統(tǒng)防熱焊接廠品系類62305-3 Direct Strike Protection 防雷與接地Part

8、 3: Physical damage to structures andlife hazard雷導(dǎo)致建筑物損壞和生命危險性62305:2 Risk Management 風(fēng)險評估管理方式風(fēng)險計算方式(分析研究)962305-3 Direct Strike Protection 防雷與接地Eg.Protection angle method: LPL 4530530H = 20 mtr避雷針方法LPL 4eg. 防雷防護第四級62305-3 Direct Strike Protection 防雷與接地Air Termination System法拉第籠子方法（直接雷擊侵入）Protective

9、 methods for determiningition of air termination systemProtective angle method避雷針62305-3 Direct Strike Protection 防雷與接地Rolling sphere method 滾球方法RView on arrow ABView on arrow BA62305-3 Direct Strike Protection 防雷與接地Rolling sphere method 滾球方法RView on arrow AABView on arrow B62305-3 Direct Strike Pro

10、tection 防雷與接地Air Termination SystemProtective methods for determiningition of air termination systemRolling sphere method 滾球方法Air termination requiredRR - Rad us o the ol ing sphe eNO PRO EC EDNO PRO EC ED RADIUSOF PHERE 60m00 mZONE OF PRO EC ION62305-3 Direct Strike Protection 防雷與接地Air Termination

11、System3 basic protective methods for determiningition of air termination system法拉第籠子方法（直接雷擊侵入）Rolling sphere method 滾球理論方法Protective angle method 避雷針Mesh method 避雷網(wǎng)格1062305-3 Direct Strike Protection 防雷與接地雷擊的具體分布比例Percentage Distributionof Strike Po s雷擊損壞的位置20001995(A) 尖點或拐角90%80%(B) 水平/傾斜的邊緣5%10%(C

12、) 垂直邊緣2%5%(D) 平面 A附近1%5%(E) 其他位置0%N/A62305-3 Direct Strike Protection 防雷與接地雷擊的Distribution of Lightning Strike Po s分布點62305-3 Direct Strike Protection 防雷與接地符合國際標準Mesh method Most Common used in BS6651 and now BSEN/IEC 62305Down conduc or DCDC Vertical air termination (bare vertical rod)避雷網(wǎng)格at 10m er

13、vals or strike plates at 5mervalsConcealed conductorVertical air ermination or strike plateDCDCHorizontal conductorRoof pitchDCDCLPL四級防護Mesh size (m x m)I5 x 5II10 x 10III15 x 15IV20 x 2062305-3 Direct Strike Protection 防雷與接地Air Termination System法拉第籠子方法（直接雷擊侵入）Protective methods for determiningitio

14、n of air termination systemMesh methodZ e e避雷網(wǎng)格 2 m x 2 m A Te m as a 2 m e va s62305-3 Direct Strike Protection 防雷與接地避雷針方法Protective angle methodh1hh2Variable angles depending on height to reference plane and class of LPS62305-3 Direct Strike Protection 防雷與接地度 alpha807060504030IV20IIIIIIClass of LP

15、S1000 2102030405060h m高度Note 1 Not applicab eyond the va ues marked withOnly ro ling sphere and mesh methods apply hese cases.Note 2 h is the height of air-termination above the reference plane of the area to be protected. Note 3 The angle will not change for values of h below 2m.計算方式 Determination

16、of protective angle 避雷針1162305-3 Direct Strike Protection 防雷與接地引下線Down ConductorsLateral connections (coronal rings) by fortuitous metalwork or external conductors connected toat regularervalspacing corresponds with relevant class of LPSClass of LPS防雷級層部Typical distan(m)I10II10III15IV2062305-3 Direc

17、t Strike Protection 防雷與接地Where to apply installation安裝防雷系統(tǒng)-鋼筋/鐵合金主部分62305-3 Direct Strike Protection 防雷與接地Where to apply installation:Natural Metallic Structure避雷方法:屋頂/鋼筋/鐵合金62305-3 Direct Strike Protection 防雷與接地Natural Steel I-Beam /Reinforcing Steel避雷方法:屋頂/鋼筋/鐵合金62305-3 Direct Strike Protection 防雷

18、與接地Natural Metal Roof避雷方法:屋頂/鋼筋/鐵合金Class ofMaterialThickness(1)Thickness(2)LPSt (mm)t (mm)I to IVLead-2.0Steel (stainless, galvanized)40.5Copper50.5Aluminium70.65Zinc-0.7NOTE 1: thickness t prevents puncture, hot spot or ignition.NOTE 2: thickness t only for metal sheets if it is not important to pr

19、event puncture, hot spot or ignition problems.62305-3 Direct Strike Protection 防雷與接地Air Termination System法拉第籠子方法（直接雷擊侵入）Protective methods for determining the natural components1262305-3 Direct Strike Protection 防雷與接地Earth termination network Function接地網(wǎng)絡(luò)功能-dissipate discharge safelyo ground全電流到地62

20、305-3 Direct Strike Protection 防雷與接地接地理論 兩方式樣（接地網(wǎng)絡(luò)）Earth TerminationType A arrangementSystemrods or horizontal conductor electrodes直接或橫接（方法地網(wǎng)絡(luò)）Type B arrangementring conductor or foundation earth electrode地網(wǎng)或地基的鋪設(shè)62305-3 Direct Strike Protection 防雷與接地Natural components “New approach”within concrete

21、(rebar)新Steel reinforcementCl ed cable to rebar鋼connection筋Stranded copper cable(70mm 2PVC insulated)連Cast in, non-接ferrous bondingpo方式Bonding conductor62305-3 Direct Strike Protection 防雷與接地使用焊有銅線的接地點鋼筋連接在一起連接器尾端已焊有銅線(70mm2)接地點銅帶62305-3 Direct Strike Protection 防雷與接地Down Conductors 引下線Natural Compon

22、ents使用焊有銅線的接地點鋼筋連接在一起62305-3 Direct Strike Protection 防雷與接地Lightning equipotential bonding聯(lián)合接地Protection measures for roof mounted equipment containing electrical equipmentAlready caused some debateApply BS6651, bond metal casingo air termination system direct strike casing may/may not be punctured

23、(thickness)“Not addressed” partial lightning currents or induced overvoltages entering structure via metallic servi1362305-3 Direct Strike Protection 防雷與接地銅包鋼接地棒切面視圖62305-3 Direct Strike Protection 防雷與接地接地棒之間的距離不得小于打入地底的深度62305-3 Direct Strike Protection 防雷與接地Most common form- copperbond earth/groun

24、d rod (Type A method BSEN62305)銅包鋼接地棒Tested to BSEN50164:Part 2銅包鋼接地棒 電鍍62305-3 Direct Strike Protection 防雷與接地Earth/ground rods: connected to each down conductor接地極- 連接到每個引下線62305-3 Direct Strike Protection 防雷與接地Step Voltage Potential站感應(yīng)雷 能輸入高電壓62305-3 Direct Strike Protection 防雷與接地站感應(yīng)雷能輸入高電壓1462305

25、-3 Direct Strike Protection 防雷與接地Where to apply installation地網(wǎng)或地基的鋪設(shè)Type B Arrangement62305-3 Direct Strike Protection 防雷與接地Where to apply installation地網(wǎng)或地基的鋪設(shè)Type B Arrangement62305-3 Direct Strike Protection 防雷與接地Type B Arrangement地網(wǎng)或地基的鋪設(shè)Ring conductor, sited around periphery of structure 80% of

26、its length in contact with soil80%地基粘在土下Minimum length of earth electrode (500 ohm metres) shall be 5m最短的地基62305-3 Direct Strike Protection 防雷與接地Type A Arrangement直Total number of rods/earth electrodes should not be接lessn two或橫Minimum 地棒長度 length of earth rod ( 土壤接500 ohm metres) shall be minimum 最短

27、2.5m方Disregard, provided overall value lessn 10 ohms法Conversely add further sections ofbine with type B arrangement to achieve 10 ohms62305-3 Direct Strike Protection 防雷與接地Where to apply installation地網(wǎng)的鋪設(shè)62305-3 Direct Strike Protection 防雷與接地Earth electrode conductor laid out地網(wǎng)的鋪設(shè)1562305-3 Direct St

28、rike Protection 防雷與接地Soil Conditioning Bentonite土壤“接地粉”62305-3 Direct Strike Protection 防雷與接地土壤“接地粉” - 高效率Soil Conditioning Agents Against High Soil Resistivity62305-3 Direct Strike Protection 防雷與接地土壤計算方式62305-3 Direct Strike Protection 防雷與接地量測土壤 人FrWENNER (scientific pr 1915)62305-3 Direct Strike P

29、rotection 防雷與接地如何量測土壤的種類How do we measure soil resistivity?62305-3 Direct Strike Protection 防雷與接地影響電阻率的Soil resistivity may effect due toType of soils 土壤的種類Moisture contains 土壤含水量Salt contains 鹽的成分Temperature effect 土壤的溫度1662305-3: BSEN 50164Furse have completed in ex s of:150, 100 kA impulse tests4

30、50 hours of salt spray testing1050 hours of Sulphur Dioxide testing 150 hours of Ammonia testing0防雷與接地的組件BRITISHBS EN5016 -1 20Lightning protection components (LPC)-Part 1 Requirements for connect on componentsThe Eu op an S anda d EN 50164-1 1999 has he ta us of a B t h S anda d62305-3: BSEN 50164P

31、ass Criteria通過考驗方式A connection component is deemed to have passed the test after all of the previous treatments / measures, if:導(dǎo)體電阻Is a contactwithin limits.配件損壞It is visually sound.配件松開Is a loosening torque within limits.62305-3 Direct Strike Protection 防雷與接地Lightning Protection Components防雷的組件BS E

32、N 62305 used in LPS components BS EN/IEC 50164 series of standards國際標準62305-3 Direct Strike Protection 防雷與接地Lightning Protection Components防雷與接地的組件62305-3 Direct Strike Protection 防雷與接地土壤“接地粉”+ 石灰Soil Conditioning FurseCEM62305-3 Direct Strike Protection 防雷與接地TYPICAL INSTALLATION案例:土壤“接地粉”62305-3: B

33、SEN 13601BSEN13601:2002 Copper Rod/T/Bar/Wire feneral electrical pur eFurse have completed IN-HOUSE ex s of:BRIT SH STANDARDBS EN 13601 2002Full range eg. 50mm x 6mm or 25mm x 3mm Copper t conductors testsCopper and copper alloys -Copper rod bar and wire for general electrical pu銅膠帶The Eu op an S an

34、da d EN 13601 2002 has he st tus of a B t sh S anda d1762305-3 高溫熔焊放熱焊接Exothermic Welding System62305-3: BSEN 50164接地的組件62305-3: BSEN 50164BSEN50164:Part 2: Requirements for conductors and earth electrodesFurse have completed IN-HOUSE ex s of: Air termination conductors, air termination rods, earth

35、lead in rods, down and earth conductorstestsEarth rods and jo s for earth rods testing銅膠帶銅包鋼接地棒 BRITISH RD BS ENSTANDA50164 2 20Lightning protection components (LPC)-Part 2 Requirements for conductors and earth electrodeT e Eu opean S anda d EN 50 64-2 2002 has the s a us of a B t h S anda d62305-3:

36、 BSEN 50164防雷的組件62305-3: BSEN 50164避雷針的組件1862305-3 高溫熔焊How to make a如何操作FurseWeld ConnectionStep 4Step 5Step 6關(guān)上蓋子，從旁化學(xué)過程會安全當(dāng)溶焊完成以后，邊用點點火地在模進行應(yīng)用刮刀和刷子清，在原始粉末上潔模具，方便下次發(fā)出火花的焊接工作62305-3 高溫熔焊How to make a如何操作FurseWeld ConnectionStep 1Step 2Step 3為確保模具的干旱度 將金屬盤放置 將化學(xué)粉末倒入模應(yīng)預(yù)先進行加熱或焊 于模具的底部，并把起火粉接測試，然后將干凈末撒播

37、在模具的邊的導(dǎo)體放在模緣62305-3 高溫熔焊Equipment & AcsoriesHandle Clder Box & CartridgesMouldMould BrushFl GunMould Scr rRetaining DiscCab rushFile Card Brush高溫熔焊產(chǎn)品- 配件62305-3 高溫熔焊Furseweld Vs連接操作比率Other ConnectionsType ofConnection by Pre reConnection byConnection byConditions(eg. CompresBrazing orFurseweld高溫熔焊Co

38、nnectors & MechanicalConnectors)SolderingExothermic WeldingMechanicalModerateStrongVery StrongStrength 器械耐力CorroModerateLow Lowest 抗腐Contact SurfaceLimitedGoodBest接點ContactContactContactWithstandingAboutAboutMore Temp 溫度350 Deg C500 Deg C1000 Deg CCurrent CarryingVeryCapacity 涌電流ModerateGoodBestCond

39、uctivityGoodBetterBest導(dǎo)線載流62305-3 高溫熔焊放熱焊接 如何操作How FurseWeld WorksMould1. 模具Crucible2. 裝藥槽Tap Hole3. 溶液通道Weld4. 焊接點Conductor Cable 5. 銅線Conductor Rod 6. 接地棒Retaining Disc7. 熱熔片Weldder8. 焊粉Startingder 9. 引火粉62305-3 高溫熔焊FurseWeld Pros 放熱焊接連接方式Known generally as Exothermic Welding.Simple & Self-contain

40、ed method of forming high quality electrical connections.Requires no externaler or heat source.Com act Pro s makin it Vortable.Connections are made inside a semi permanent graphite mould.Uses the reaction ofder Copper Oxide & Aluminium.FURSEWELD放熱焊接是一種化學(xué)放熱反應(yīng)他是一個簡單又方便的焊接方實際溫度高于1800攝氏度19地鐵高溫熔焊 -方案Rail

41、 Bonds地鐵高溫熔焊 -方案Rail Earthing Arrangement地鐵高溫熔焊 -方案Rail track bonding地鐵高溫熔焊 -方案Rail track bonding地鐵高溫熔焊 -方案Rail Application62305-3 高溫熔焊Using Furseweld with other Furse Products使用焊有銅線的接地點鋼筋連接在一起20高電壓變電站-方案Pure of Earth Grid網(wǎng)絡(luò)高壓電流 故障a) provide defined path for fault current from fault toasso ted syste

42、m neutral高電壓變電站-方案電壓變電站接地計算方式(分析研究)Nowadays for Complex/largelants- use software to mearth grid高電壓變電站-方案SUBSION EARTHING (GROUNDING)接地網(wǎng)絡(luò)62305-3地鐵高溫熔焊 -方案Rail Bond地鐵高溫熔焊 -方案Rail track bonding21高電壓變電站-方案高電壓ROEP = Ig . RgCurrent flowingo grid - criticalIf Ig quoted 20kA Then 430v = 20kA . Rg Rg = 0.021

43、5高電壓變電站-方案熱和冷地高電壓地區(qū)ROEP 430V HOTSITE(A MING FAULTCLEARING 0.2S) EDGE OF SITE.EARTHROEPGRID CONDUCTORSPOTENTIAL ON THE SOIL SURFACEFALLSTO ZERO AFTER A CERTAIN DISTANCEAWAYFROM THE SITE.高電壓變電站-方案ROEP (voltage on buried earth conductor with respect to remote earth) 規(guī)定熱和冷 COLD HOTCOLD HOT(fast response

44、 protection 0.2s)高電壓變電站-方案Some utilities keen to classify HOT and COLD sites in accordance with ernationalmunications Union(ITU) limits規(guī)定熱和冷高電壓地區(qū)高電壓變電站-方案- IEEE Standard 80 Guidefor Safety in AC Subs ion Grounding-EATS 41-24-BS 7430-BS 7375Standards規(guī)定標準高電壓變電站-方案對摸和站腳室高壓高壓電流 傳達b)limit ROEP voltage on

45、 buriied earth conductor with respect to remote eartder fault conditions to a safe valuet can be transferred outside site boundaryc)limit potential difference on and adjacent to site - ensure safety to people/livestock22高電壓 變電站-方案RequirementDesignsoil resistivityParametersearth fault grid current/du

46、rationshort circuit current/durationprotection clearing timeshighlayer details (if used)site size高電壓 變電站-方案Design-Asymmetrical conductor/rod layout based on multilayer soil m高電壓變電站-方案SoftwareMALT module of CDEGS(other modules - MALZ mhigh frequency faults etc)S 案分析高電壓變電站-方案高壓電流 故障eg Fault current -

47、25kA for 1 secConnectormax temp C溫度Bolted 250Brazed 450Exothermic 7001083Conductor size (mm)斷面圖高電壓變電站-方案Connections Grid System連接Exothermic weldedBrazedpres高電壓變電站-方案Earth/Ground electrode grid地網(wǎng)的鋪設(shè)Conductor: copper material- Stranded eg.120mmsqSolid Circular eg.120mmsqTeg.50mm x 6mm23Apparent Resist

48、ivity (Ohm metres)高電壓 變電站-方案Protection clearing timesIf classifying HOT or COLD then ITU value (430v or 650v) determined by protection clearing timeHigh layer detailsTypically crushed rock/Tarmac etcused for raising tolerable levels of step and touch voltage高電壓 變電站-方案Minimum Conductor Size Ansi/IEEE

49、 Std 80: 2000 TCAP 10 4 K 0 Tm If Amm 2 ln tc r r K 0 Ta Ifr.m.s. Fault current in kA.Amm2Conductor cross section m2.Tmum allowable temperature in C.TaAmbient temperature in C.TrReference temperature for material constants in C.oThermal coefficient of resistivity at 0 C.rThermal coefficient of resis

50、tivity at reference temperature Tr .rResistivity of the ground conductor at reference temperature Tr in cm.Ko1/o at 0 C.tcTime of current flow in seconds.TCAPThermal capacity factor from Table 1, in J/cm3/ C.高電壓 變電站-方案Short circuit current/durationum single phase to ground short circuit current- wha

51、t equipment usually rated toThese values - used for sizing of conductor高電壓 變電站-方案Earth fault grid current/durationproportion of current flowing to ground via earthing grid thus contributing to ROEPused in calculation of step, touch and transferred potentials高電壓 變電站-方案Graphical Represenion of Multila

52、yer Soil102Resistivity MThickness of upper layer, d1 0.42 m Resistivity of upper layer, 1 40.3 m10Thickness of middle layer, d2 0.68 mResistivity of middle layer, 2 2.6 m Resistivity of lower layer, 3 5.7 m01010-10010102Average er Electrode Spacing (metres)高電壓 變電站-方案Soil Resistivityreadings / spacin

53、gs up to 50m various locations around sitesoftware soil m24高電壓 變電站-方案3d View of Touch Potentials Created by an Earth Fault1 0 8 Legend2 4 Touch4 77 0 Potential9 3(Volts)Tolerable Touch Voltage (70 kg on soi ) 96.3 Volts5 60 2高電壓 變電站-方案2d View of Touch Potentials Created by an Earth FaultGROUND EQUIP

54、MENTAND GRID ATEPR 227 VGRID CONDUCTORSVt 57 VPOTENTIAL ON THESOIL 170 VPOTENTIAL ON THESOIL SURFACE.高電壓 變電站-方案3d View of Surface Potentials Created by an Earth FaultLegendSurface Potential (Vo ts)Rise of Earth Potential (ROEP) 227 Volts229 4221 5213 6205 6197 7189 88173 9166 00150 1142 23126 3118 4

55、110 5102 594 686 778 862 9高電壓 變電站-方案2d View of Surface Potentials Created by an Earth FaultPOTENTIAL ON THE SOIL ATTHIS PO217 VPOTENTIAL ON THE SOIL ATTHIS PO170 VGROUND LEVEL EARTH GRID ATEPR 227 VVt 10 V GRD CONDUCTORSVt 57 VPOTENTIAL ON THESOIL SURFACE.高電壓 變電站-方案Finalized design, will displace ea

56、rth grid around site-identify if site is HOT/COLDidentify tolerable step and touch voltagescompile 3D contour maps showing the contours of ROEP, step and touchitions高電壓 變電站-方案Site sizeArea available for earth grid network2562305-4 防雷器系類瞬態(tài)過電壓Lightning Surge TheoryResistive間接雷擊(電感耦合)間接雷擊(電阻耦合)Inductiv

57、ePRINCIPAL COUPLING MODES雷電是怎樣引起瞬態(tài)過電壓的？62305-4 防雷器系類What Transient Over-voltage are NOT !62305-4 防雷器系類瞬態(tài)過電壓防護的基本方法Part 4: Electrical & electronicsystems withinstructures防雷器系類高電壓 變電站-方案Fence Earthing (Safe Design)FENCE EARTHED SEPARA FROM EARTH GRIDSAFE (OUTSDE SITE)SAFE ( NSIDE SITE)GROUND LEVELGRID

58、 CONDUCTORSPOTENTIAL = 1350 VPOTENTIAL = 930 V290 VPOTENTIAL = 6 0 VPOTENTIAL PROFILETOLERABLE TOUCH VOLTAGE = 70 V20 V高電壓 變電站-方案Fence Earthing (Unsafe Design)FENCE DIRECTLY CONNECTED TO EARTH GRIDUNSAFE (OUTSIDE SITE)SAFE ( NSDE SITE)GROUND LEVELEARTH POTENTIAL RISE (EPR) = 1666 VGRD CONDUCTORS100

59、VPOTENTIAL = 1566 V946 VPOTENTIAL PROFILEPOTENTIAL = 720 VTOLERABLE TOUCH VOLTAGE = 704 V高電壓 變電站-方案3d View of Step Potentials Created by an Earth FaultLegendStep Potential (Vo ts)Tolerable Step Voltage (70 kg on soil) 113.5 Volts7 677 306 946 576 215 845 485 114 754 384 023 653 292 922 562 191 831 4

60、60 730 002662305-4 防雷器系類法拉第籠 毀壞闖進FARADAYS “Holes”打中電纜JUNCTION感BOX應(yīng)輸入高電壓系統(tǒng)ERDATA LINESM demLaptopAC OUTLET62305-4 防雷器系類Equipment is protected by Faradays cage法拉第籠雷電通過接地引下線沒有感應(yīng)到附近的電纜線或信號線的瞬態(tài)過電壓 Laptopupply62305-4 防雷器系類間接雷擊(電容耦合)are protected by Faradays cage法拉第籠62305-4 防雷器系類是雷電與電纜之間的電磁感應(yīng)效應(yīng)INDUCTIVE CO