电气间隔和爬电距离

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查询 /EN/INSTITUTE/ONLINESERVICE/VDE-APPROVED-PRODUCTS/Pages/Online

2、-Search.aspxUL查询/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm IEC/EN标准版本区别：-IEC/EN 60335-1:家用电器产品通用标准-IEC,Amendment:标准的修订版本 1) A1:2003,说明2003年对标准进行了修订，版本编号:A1 2) 同一版本IEC标准只允许两次修订,之后将颁布新版本标准. IEC 60335-1:2001(Fourth ed)+A1:2004+A2:2006 (现在IEC 60335-1 更新到IEC 60335-1:2010 (Five ed)-EN标准的修订版本(标准有效期 DOP

3、和DOW 确定) 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）:根据IEC标准,转化为国家标准的最后期限,也即是EN新标准颁布日期.DOW:旧标准被替代的最后期限,即产品在这之前必须完成标准更新. (如 dow:2007-10-1,则是2007-10-1前需要作标准更新.)如果在新版本的标准中声明了旧版本标准的DOW，则旧版本的标准在DOW后自动失效。无论是否到了证书声明的有效期，根据旧版本标准的证书和报告也自动失

4、效。如需延期，必须进行标准升级，根据新版本的标准要求重新申请证书。EN60335-1:2002/A14如下面DOW：2013-05-01，即是A13标准将于2013-05-01自动失效，A14开始强制执行.EN60335-1:2002/A15如下面DOW：2014-05-02，即是A14标准将于2014-05-02自动失效，A15开始强制执行.Cls 29,Creepage distances, clearances distances and through insulation电气间隙决定某一电气间歇是否满足标准所允许的最小要求须要确定以下四个参数:- 绝缘种类,即你所要判的地方是基本/加

5、强/功能/附加绝缘里的那一种.-额定脉冲电压(Rated Impluse Voltage)过电压类别(Over Voltage Category)和工作电压决定该电路的额定脉冲电压.-污染等级(1,2,3)-产品工作电压如何确定电气间隔最小值：确定产品适用电压.在本标准范围内的器具一般为II类过电压.污染等级判断,一般参考具体产品所属的专用标准.绝缘种类,即你所要判的地方是基本/加强/功能/附加绝缘里的那一种.在测量电气间隙时,裸露导体上施加2N的外力;可触及外壳施加30N的外力.如果结构距离受磨损，变形，部件运动或装配影响时，电气间隔要增加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.爬电距离决定某一爬电距离是否满足标准所允许的最小要求须要确定以下四个参数: -绝缘种类,即你所要判的地方是

9、基本/加强/功能/附加绝缘里的那一种. -产品工作电压. -污染等级(1,2,3) -材料的漏电起痕指数.材料组别: a.material group I: 600=CTI b.material group II: 400=CTI600 c.material group IIIa: 175=CTI400 d.material group IIIb: 100=CTI175在测量爬电距离时,裸露导体上施加2N的外力;可触及外壳施加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.并不是三类结构或者SELV部分是可以安全触及或者不带电的.如果强电与SELV电路之间少于8mm距离,是不能触及，并认为是live parts.如低压电子线路并没有与危险带电体有效安全隔离，该电子线路必须与可触及表面之间应满足双重绝缘和加强绝缘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.不同极性的带电线路之间应满足功能绝缘.The transistor leads limitation of creepage distance.如功能绝缘被短路时，产品仍符合Cls 19，无危险发生，其