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??? " u3 `- y( v: f" d4 s2 K关键元件清单中要管控哪些信息？ ) R! h- N+ H2 t/ i" Z0 `4 `8 ?
要满足标准EN60950-1的哪个章节呢？* g+ `$ k8 S; J, p
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, " L6 ^& Y* M+ I2 _) Y
当然首先应符合压敏电阻的标准要求. [s:8] / x, H/ Z7 q3 \* X( m x % w6 b& |# t3 Y1 X/ E/ [8 B- t8 a! l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 , X p+ _+ B' f! T3 N0 F; R$ P2 \4 q; ]* q4 S
控管訊息一般就是 電阻值和耐壓~6 e2 w# y% r+ J* |- g4 D
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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:4 w2 i& L- J6 I% E- }
IEC60950:; g- O! u9 W0 }$ f% V8 ?! m! ]
1.5.9.2 Protection of VDRs: d( p8 q7 }2 y( C* X# m
For protection against 8 \& N' P& k7 X# U− temporary overvoltages above the maximum continuous voltage, # b: x: L* T" x5 w− thermal overload due to leakage current within the VDR, and+ ^9 z: g/ ]" a) Y& O7 _
− burning and bursting of the VDR in the event of a short-circuit fault, " R+ l' Z, _. ` O# Zan interrupting means having an adequate breaking capacity shall be connected in series with / c" U( L( b1 u: P+ X! lthe VDR. This requirement does not apply to a VDR in a LIMITED CURRENT CIRCUIT. 9 c7 w& P" ~9 z% G( M1 b+ G( y6 ]1 q2 V
IEC60065:, _" i% w# V Y/ A, C% k
– thermal stress _3 ?5 R( Y2 {* }; jFor apparatus with nominal MAINS voltage of <150 V, the apparatus and a test resistor( T% c5 S' ?) g& J2 K
connected in series with the apparatus shall be energised from an a.c. source of 250 V. ' g& g6 E( x ^9 S J+ D j- {The voltage source shall be applied for 4 h or until the circuit path through the varistor' `+ U; w, G8 x# N6 A; c6 @: w
opens for each of the test series resistance values: 2 000 Ω, 500 Ω, 250 Ω, 50 Ω. A$ o' f' @+ }) U+ B1 Y
separate apparatus shall be used for each resistor value, unless damage from the previous) ^7 m4 O5 t( U6 y( T/ o8 d
test has been repaired. 8 I. \6 v1 w7 e b2 eAt 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：1 z! M0 g- a* u g) i6 j
1. 符合IEC61051-2要求,正常工作时温度不超过85度; ) Z6 k/ z, H# E5 j* V) J2. 电压至少为1.2times设备额定输入电压; & P+ k/ M: N. h; C e+ B3. 通过6KV/3kA的脉冲测试作者: wolfxu 时间: 2010-4-23 17:50
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