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[UL认证] 整机中的变压器要求

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发表于 2009-4-22 11:02 | 显示全部楼层 |阅读模式
广东安规检测
有限公司提供:
我们的产品准备做UL认证,采用标准为UL61010-1,该标准和IEC61010-1是协调标准。产品里边准备放置一个变压器,用于将220VAC电源转换为110Vac电压给内部供电。想知道这个变压器是否必须有认证?如果需要的话,应该符合哪个标准呢?放在设备里,是不是还要随整机做一些测试?还是说不需要认证,只要随机做一些测试就可以了呢?
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大家讨论一下~~我想,应该可以借鉴IEC60335、IEC60959等整机产品认证的经验吧。
发表于 2009-4-22 11:05 | 显示全部楼层
变压器可以不用有认证可以随机测试.
发表于 2009-4-22 11:10 | 显示全部楼层
UL认证中的变压器要求有单独的认证的。
发表于 2009-4-22 11:21 | 显示全部楼层
整機中變壓器沒有做認證吧,或者從買變壓器供應商提供此方面證明就可以被認證工程師承認吧。
发表于 2009-4-22 11:29 | 显示全部楼层
有认证当然更好,没有的话,可以随机测试,但内部材料应有UL认证。
 楼主| 发表于 2009-4-22 11:37 | 显示全部楼层
附上标准原文供大家参考、讨论:# L  f' K" i$ \8 i: ~9 J) U

& U* S! M/ ?0 a2 J/ f5 FUL61010-1(基本等同IEC61010-1)% H7 a* @: S0 z  |, r9 |

* K' x* \) I' k4 ]4.4 Testing in SINGLE FAULT CONDITION
0 I" j3 N; T; [% E。。。。。! y* m& t2 o* p) R
4.4.2 Application of fault conditions+ t9 S- _7 o5 x$ m4 z) Y" g
。。。。。
, a& ^: U5 `- t4 D4.4.2.6 MAINS transformers
& c8 r  n0 W: b* NThe secondary windings of MAINS transformers shall be short-circuited as specified in 4.4.2.6.1, and
/ O/ a) L  I8 m2 o& _# X/ Hoverloaded as specified in 4.4.2.6.2+ x: K+ z& h! z# f* C
A transformer damaged during one test may be repaired or replaced before the next test.0 X2 {( t1 w0 a. w
Tests for MAINS transformers tested as separate components are specified in 14.7.
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) ^7 U5 X# D  H# ~8 O' M6 H14 Components
8 y1 P: C$ X% d1 e4 L14.1 General
8 V  E1 u2 m9 P( g5 i5 qIf safety is involved, components shall be used in accordance with their specified RATINGS unless a specific
( ]+ P$ A* d) J! Y" {/ e: j; u5 _exception is made. They shall conform with one of the following:. }0 {9 ~) i& C0 s  I
a) applicable safety requirements of a relevant IEC standard. Conformity with other% c" F- F. L* x) Y1 O# ?: l
requirements of the component standard is not required. If necessary for the application,) k$ ^) d3 _% p% H  v# x9 _
components shall be subjected to the tests of this standard, except that it is not necessary to
- d+ Z, m# j+ S. B* h2 Z7 p6 P* K9 Qcarry out identical or equivalent tests already performed to check conformity with the component
( [6 t5 b2 l# z( T3 b" bstandard;: u4 m6 e: G" D2 t, o# X+ S
b) the requirements of this standard and, where necessary for the application, any additional
6 e  n: p& S( q3 x0 Gapplicable safety requirements of the relevant IEC component standard;
5 \' d( E1 D) O; `) ^c) if there is no relevant IEC standard, the requirements of this standard;
3 y; ]2 y2 u; }) d6 Pd) applicable safety requirements of a non-IEC standard which are at least as high as those of: g' g2 H) f, q' H" T3 Z% g- m
the relevant IEC standard, provided that the component has been approved to the non-IEC1 K, {1 k: Q, c1 |. v7 m! h
standard by a recognized testing authority.
; s$ E6 U& s- G! T/ HNOTE Tests performed by a recognized testing authority which confirm conformity with applicable safety, I' g( i0 B/ U! M7 R! o
requirements need not be retested, even if the tests were performed using a standard other than an IEC standard.: o8 _9 L1 a5 B& @3 ]0 [
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Figure 10 is a flow chart showing methods of conformity verification.5 E$ H" s) t) N: ?+ N+ c
Conformity is checked by inspection and, if necessary, by test. No further tests are required for motors
3 c1 T& i6 v! G. Z, d+ s- Y! a% b/ Tand transformers that have passed the applicable tests of 4.4.2.4, 4.4.2.6, 14.2 and 14.7. (注:4.4.2.4是关于电机的故障测试,14.2是关于电机的部件测试)* x$ b/ r0 V/ f6 f  Z0 j
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。。。。。。; a1 j* a8 q+ [+ ~3 L
14.7 MAINS transformers tested outside equipment6 K' K' S9 T6 V& v! W( j
MAINS transformers tested outside the equipment (see 4.4.2.6) shall be tested in the same conditions as
+ f2 G: O/ Y# kexist inside the equipment if these could affect the test results.
  h! X% h1 G" t0 W0 T- F! KConformity is checked by the short-circuit and overload tests specified in 4.4.2.6, followed by the test of
0 z/ k3 ?6 R( x4 l, {4 \4.4.4.1 b) and c). If there is any doubt whether a transformer would pass the other tests specified in 4.4.4
3 y$ z: S7 c, h/ V: B  pand 10.2 when installed in the equipment, the tests are repeated with the transformer installed in the
1 n- h; d* t, kequipment.
 楼主| 发表于 2009-4-22 11:42 | 显示全部楼层
从以上标准原文看,我感觉好像是需要有认证,除此以外,还要做4.4.2.6中规定的故障试验,即短路和过载。如果没有认证的话,除了要做4.4.2.6中的故障试验外,还要做变压器相关标准中规定的测试和评估,如材料认证审核、绝缘等。
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4 J: r) g2 v0 Q, k; t大家怎么看?
发表于 2009-4-22 11:44 | 显示全部楼层
我们这的是随机认证..但做的不是UL. B8 ~) o( f9 S* h+ s
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 楼主| 发表于 2009-4-22 11:49 | 显示全部楼层
楼上的,你说的“随机认证”,是否包含按照变压器的标准测相应内容?
发表于 2009-4-23 11:41 | 显示全部楼层
变压器一般随机测试就可以了,一般高于A级绝缘的,绝缘系统需要认证。如果有温保,则需单独提供认证证书。
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