電氣間隔和爬電距離

1、EN 60335-1Creepage distances, clearances distances Useful websiteTo check the IEC latest standard at: http:/www.iec.ch/searchpub/cur_fut.htmTo check the EN latest standard at:http:/www.cenelec.eu/dyn/www/f?p=104:104:2283954382744111VDE查詢 /EN/INSTITUTE/ONLINESERVICE/VDE-APPROVED-PRODUCTS/Pages/Online

2、-Search.aspxUL查詢/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm IEC/EN標準版本區(qū)別：-IEC/EN 60335-1:家用電器產(chǎn)品通用標準-IEC,Amendment:標準的修訂版本 1) A1:2003,說明2003年對標準進行了修訂，版本編號:A1 2) 同一版本IEC標準只允許兩次修訂,之后將頒布新版本標準. IEC 60335-1:2001(Fourth ed)+A1:2004+A2:2006 (現(xiàn)在IEC 60335-1 更新到IEC 60335-1:2010 (Five ed)-EN標準的修訂版本(標準有效期 DOP

3、和DOW 確定) EN 60335 -1:2002+A11:2004+A1:2004+A12:2006+ A2:2006+A13:2008+A14:2010+A15:2011 什么是DOP/DOWDOP（Date of Publication）:根據(jù)IEC標準,轉(zhuǎn)化為國家標準的最后期限,也即是EN新標準頒布日期.DOW:舊標準被替代的最后期限,即產(chǎn)品在這之前必須完成標準更新. (如 dow:2007-10-1,則是2007-10-1前需要作標準更新.)如果在新版本的標準中聲明了舊版本標準的DOW，則舊版本的標準在DOW后自動失效。無論是否到了證書聲明的有效期，根據(jù)舊版本標準的證書和報告也自動失

4、效。如需延期，必須進行標準升級，根據(jù)新版本的標準要求重新申請證書。EN60335-1:2002/A14如下面DOW：2013-05-01，即是A13標準將于2013-05-01自動失效，A14開始強制執(zhí)行.EN60335-1:2002/A15如下面DOW：2014-05-02，即是A14標準將于2014-05-02自動失效，A15開始強制執(zhí)行.Cls 29,Creepage distances, clearances distances and through insulation電氣間隙決定某一電氣間歇是否滿足標準所允許的最小要求須要確定以下四個參數(shù):- 絕緣種類,即你所要判的地方是基本/加

5、強/功能/附加絕緣里的那一種.-額定脈沖電壓(Rated Impluse Voltage)過電壓類別(Over Voltage Category)和工作電壓決定該電路的額定脈沖電壓.-污染等級(1,2,3)-產(chǎn)品工作電壓如何確定電氣間隔最小值：確定產(chǎn)品適用電壓.在本標準范圍內(nèi)的器具一般為II類過電壓.污染等級判斷,一般參考具體產(chǎn)品所屬的專用標準.絕緣種類,即你所要判的地方是基本/加強/功能/附加絕緣里的那一種.在測量電氣間隙時,裸露導體上施加2N的外力;可觸及外殼施加30N的外力.如果結構距離受磨損，變形，部件運動或裝配影響時，電氣間隔要增加0.5mm.According to tabel 1

6、5 and tabel 16,comfirmed basic insulation,supplement insulation,reinforced insulation&functional insulation of minimum Clearances distances (such as,working voltage: 220-240V,overvolatge category II) as below:Insulation typeDistanceBasic insulation1.5mmSupplementary insulation1.5mmReinforced insulat

7、ion3mmFunctional insulation1.5mmExample for basic insulation(1.5mm)The terminals of tubular sheathed heating elements counted 1mm, if the microenvironment is pollution degree 1.Example for supplement insulation(1.5mm)The minimum clearance is same as the basic insulationExample for reinforced insulat

8、ion(3mm)The reinforced insulation using the next step for rated impulse voltage. Example for functional insulation(1.5mm) The functional insulation is between live parts of different potential.The minimum clearance is same as the basic insulation.爬電距離決定某一爬電距離是否滿足標準所允許的最小要求須要確定以下四個參數(shù): -絕緣種類,即你所要判的地方是

9、基本/加強/功能/附加絕緣里的那一種. -產(chǎn)品工作電壓. -污染等級(1,2,3) -材料的漏電起痕指數(shù).材料組別: a.material group I: 600=CTI b.material group II: 400=CTI600 c.material group IIIa: 175=CTI400 d.material group IIIb: 100=CTI175在測量爬電距離時,裸露導體上施加2N的外力;可觸及外殼施加30N的外力.According to tabel 17 and tabel 18,comfirmed basic insulation,supplement insul

10、ation,reinforced insulation&functional insulation of minimum creepage distances (such as at pollution degree 3,material group:IIIa/IIIb,working voltage:220-240V) as below:Insulation typeDistanceBasic insulation4mmSupplementary insulation4mmReinforced insulation8mmFunctional insulation3.2mmThe windin

11、g wire touch the motor or less specified min creepage distances core by test finger(test probe B) with 2N force.Example for basic insulationNote1:Creepage distance of winding need not be greater than the associated clearance specified in table 161.5mm4mmExample for supplement insulation The creepage

12、 distance of supplementary insulation was between internal wire and accessible enclouse. Internal wire can be touched.(0mm)Example for reinforced insulationThe creepage distances of reinforced insulation shall not less than 8mm.As result, the creepage distance was measured 7.5mm between leads of neo

13、n lamp and the lamp cover joint.并不是三類結構或者SELV部分是可以安全觸及或者不帶電的.如果強電與SELV電路之間少于8mm距離,是不能觸及，并認為是live parts.如低壓電子線路并沒有與危險帶電體有效安全隔離，該電子線路必須與可觸及表面之間應滿足雙重絕緣和加強絕緣Example for functional insulationNote 1:Creepage distances may be reduced if the appliance complies with clause 19 with the functional insulation short-circuited. For example: Electronic component.不同極性的帶電線路之間應滿足功能絕緣.The transistor leads limitation of creepage distance.如功能絕緣被短路時，產(chǎn)品仍符合Cls 19，無危險發(fā)生，其