EN60335-1:2002认证问题！！

小胖tommy

广东安规检测
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    现在俺手头有个产品要做这个认证，第三方发回一个整改报告，判定俺fuse不应放在varistor后，说是依据啥决议规定varistor也要做故障实验，请问这个是一定要遵守的嘛？？

xiaodeng

是的。因为在你短路varistor的时候没有任何的保护，相当于短路L-N，短路电网， 所以在CTL决议里面规定， 必须放在保险丝后面。

yaotongsuo

Decision:  

a)  Varistors across the mains. Accepted by all countries (when the varistor is separately certified)
& b& |: j" D" L+ |. R
, L. o& [+ i& H* r4 a* M8 k& e/ W6 Fb)  Varistors across the mains with a protective device to guard against short-circuit.
2 ^. r1 k5 R/ D     Accepted by all countries (whether the varistor is separately certified or not)

liscsupor

yaotongsuo 发表于 2013-1-12 09:19
Decision:  
& t( I; l9 W+ l" [/ K
a)  Varistors across the mains. Accepted by all countries (when the varistor is separ ...

决议编号是多少啊？

moon1939

不需要看决议，看19章节就可以判varistor不可以放在fuse之前，varistor在一般情况下只能作为功能绝缘。

liscsupor

moon1939 发表于 2013-1-12 14:21
不需要看决议，看19章节就可以判varistor不可以放在fuse之前，varistor在一般情况下只能作为功能绝缘。

正因为是功能绝缘，需要进行19.11的试验。
安全标准并没有直接确定VDR布置位置，试验证明将VDR放在FUSE后，是符合标准的要求。如果有明确的决议文件，则可起到设计指导的作用。

小胖tommy

liscsupor 发表于 2013-1-12 14:49
正因为是功能绝缘，需要进行19.11的试验。
7 y& {7 m5 `8 \+ v  a安全标准并没有直接确定VDR布置位置，试验证明将VDR放在FUSE后 ...

' s% Z( u2 Q5 V8 k那这条是必须强制遵守的吗？还是说我可以打擦边球？？

fasten

http://bbs.angui.org/thread-104454-1-1.html
Varistors (VDR’s) across the mains
5 _1 N' F! E" ~
) n  u5 H& X0 h: J5 N
Question:
Reports from different Testing Laboratories and clients expose essential differences in interpretation and testing practice between laboratories and/or Certification Bodies.
Actually, the practice of one Certification Body is now being a market factor.
Based on above concerns we ask for clarification:
1: Shall Cl. 19.11 be strictly followed or can solutions given under 2. be accepted.
2: Can any of the decisions (made by OSM/EE) be accepted?
- A: VDR’s across the mains are accepted if the VDR is separately certified according to IEC 61051-1 or according to CECC 42200.
* R, E4 i4 {1 y7 V; q. D( x- B: VDR across the mains with a protective device to guard against short-circuit is acceptable.
+ K( m7 b. w& }$ L+ D% E- C: If A and B are acceptable, should, because of the fact that VDR’s may burn or burst during life-time due to an increasing temperature stress caused by increase of leakage current with a number of switching cycles in the VDR, a thermal interrupting device on the VDR connected in series with the VDR be required.
1 P% [, d9 Q3 ]* u2 oDecision:
1. VDR’s are not short-circuited if they are used within their manufacturer’s declared specification, when tested according to Sub-clause 19.11.2 of IEC60335-1(1991).
4 t( T8 T+ `. E" o5 a5 u2. VDR’s are short-circuited regardless of compliance with IEC61051-1, when tested according to Subclause 19.11.2 of IEC60335-1(2001).

liscsupor

小胖tommy 发表于 2013-1-12 20:07
4 H" F0 _3 ~$ B3 ]那这条是必须强制遵守的吗？还是说我可以打擦边球？？

1、建议设计前应考虑这个问题。
2、如果由于结构等因素无法将VDR放置在FUSE之后，可将VDR两引脚相连的铜铂走线设计很细（即薄弱环节部分）。在VDR短路时，由细的铜铂起FUSE作用；但应注意19.1注2的要求。

liscsupor

fasten 发表于 2013-1-12 20:49
http://bbs.angui.org/thread-104454-1-1.html
4 v; x) T5 R% E5 R* o( eVaristors (VDR’s) across the mains

谢谢！
决议是DSH-568。