整机中的变压器要求

水晶葡萄 · 发表于 2009-4-22 11:02

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？

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。

luqing_sz · 发表于 2009-4-22 11:05

变压器可以不用有认证可以随机测试.

小鸭的天空 · 发表于 2009-4-22 11:10

UL认证中的变压器要求有单独的认证的。

CLOUDY · 发表于 2009-4-22 11:21

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。

someone · 发表于 2009-4-22 11:29

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。

水晶葡萄 · 发表于 2009-4-22 11:37

附上标准原文供大家参考、讨论：

UL61010-1(基本等同IEC61010-1)

4.4 Testing in SINGLE FAULT CONDITION
。。。。。
4.4.2 Application of fault conditions
。。。。。
4.4.2.6 MAINS transformers
The secondary windings of MAINS transformers shall be short-circuited as speciﬁed in 4.4.2.6.1, and
overloaded as speciﬁed in 4.4.2.6.2
A transformer damaged during one test may be repaired or replaced before the next test.
Tests for MAINS transformers tested as separate components are speciﬁed in 14.7.
。。。。。

14 Components
14.1 General
If safety is involved, components shall be used in accordance with their speciﬁed RATINGS unless a speciﬁc
exception is made. They shall conform with one of the following:
a) applicable safety requirements of a relevant IEC standard. Conformity with other
requirements of the component standard is not required. If necessary for the application,
components shall be subjected to the tests of this standard, except that it is not necessary to
carry out identical or equivalent tests already performed to check conformity with the component
standard;
b) the requirements of this standard and, where necessary for the application, any additional
applicable safety requirements of the relevant IEC component standard;
c) if there is no relevant IEC standard, the requirements of this standard;
d) applicable safety requirements of a non-IEC standard which are at least as high as those of
the relevant IEC standard, provided that the component has been approved to the non-IEC
standard by a recognized testing authority.
NOTE Tests performed by a recognized testing authority which conﬁrm conformity with applicable safety
requirements need not be retested, even if the tests were performed using a standard other than an IEC standard.

Figure 10 is a ﬂow chart showing methods of conformity veriﬁcation.
Conformity is checked by inspection and, if necessary, by test. No further tests are required for motors
and 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）

。。。。。。
14.7 MAINS transformers tested outside equipment
MAINS transformers tested outside the equipment (see 4.4.2.6) shall be tested in the same conditions as
exist inside the equipment if these could affect the test results.
Conformity is checked by the short-circuit and overload tests speciﬁed in 4.4.2.6, followed by the test of
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
and 10.2 when installed in the equipment, the tests are repeated with the transformer installed in the
equipment.

水晶葡萄 · 发表于 2009-4-22 11:42

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。

大家怎么看？

houn · 发表于 2009-4-22 11:44

我们这的是随机认证..但做的不是UL

水晶葡萄 · 发表于 2009-4-22 11:49

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？

xuxl1234 · 发表于 2009-4-23 11:41

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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[UL认证] 整机中的变压器要求

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