标题: 电源的压敏电阻在申请LVD 时候怎样满足要求?? [打印本页] 作者: wolfxu 时间: 2010-4-22 16:26 标题: 电源的压敏电阻在申请LVD 时候怎样满足要求?? 各位电源做LVD,在L,N之间有一个压敏电阻。这个压敏电阻只是UL认证的可以满足要求吗???( F; S2 H. z) t$ e! B
关键元件清单中要管控哪些信息? 9 N, D0 b, O; i要满足标准EN60950-1的哪个章节呢?- U. L+ E, e, }+ @3 u
有知道的同行可否指点????作者: jqheart 时间: 2010-4-22 16:48
放在电源配件列表中,就应符合电源的标准, 4 F2 P9 `! ~) L; f当然首先应符合压敏电阻的标准要求. [s:8] % M; b1 _. @/ |' _, J' u
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但有些欧洲认证机构不接受UL部件证书作者: bowking 时间: 2010-4-22 17:54
一般壓敏電阻像我門公司是有廠商提供了 UL CSA VDE 所以要認證的國家應該就有北美 歐洲皆可使用 * ^5 v5 q4 J( R% g" M4 V 0 Y/ [ A! w O% K控管訊息一般就是 電阻值和耐壓~: Y+ x3 a) x0 Q) l) [' P( O+ K4 M
6 G1 k/ U# p% w5 N m1 j I9 Y這應該算是單體零件的認證 950並不會特別指出吧作者: yczhoujj 时间: 2010-4-22 21:40
need to note the clause below:- `7 S: O3 }) N' g3 `$ l
IEC60950:$ o e- n' X+ _' h- w% E6 g' F
1.5.9.2 Protection of VDRs ' j# M% J# {; }" KFor protection against7 X B1 o2 x- _/ _: E: p* I; B9 g
− temporary overvoltages above the maximum continuous voltage, * H; t' p5 H0 M$ O− thermal overload due to leakage current within the VDR, and( E# f- f/ P, |* R. c) O ^6 w, F" L
− burning and bursting of the VDR in the event of a short-circuit fault,6 D" X z. c" W: @
an interrupting means having an adequate breaking capacity shall be connected in series with 3 [ U" K- \' {. l5 cthe VDR. This requirement does not apply to a VDR in a LIMITED CURRENT CIRCUIT.& \. q2 I. p; o( M
8 R2 s0 P$ \0 V" L: b& UIEC60065:/ i7 ^2 V3 t( ~# a' X: E% A, a% j" Y
– thermal stress 3 t3 m; @7 w8 H' ~6 `$ L" XFor apparatus with nominal MAINS voltage of <150 V, the apparatus and a test resistor 3 O) u3 Y5 Q: D ?connected in series with the apparatus shall be energised from an a.c. source of 250 V. - S9 \6 o" q' mThe voltage source shall be applied for 4 h or until the circuit path through the varistor! C) N( G) b5 z2 O
opens for each of the test series resistance values: 2 000 Ω, 500 Ω, 250 Ω, 50 Ω. A 9 B. c; c8 `% j9 _' z( a( eseparate apparatus shall be used for each resistor value, unless damage from the previous & n( o, O. {* Ktest has been repaired./ @4 m0 R( f5 P$ w8 J
At the end of each test, the apparatus shall comply with clause 11.作者: junpi 时间: 2010-4-23 00:14
压敏电阻需要满足3个条件:' J7 f+ Q. w# B. N* |; j
1. 符合IEC61051-2要求,正常工作时温度不超过85度; 5 z# X: u3 q$ b. ~) ]. o" o2. 电压至少为1.2times设备额定输入电压;; ?7 Q3 L+ S; D! Q/ r
3. 通过6KV/3kA的脉冲测试作者: wolfxu 时间: 2010-4-23 17:50