UL认证变压器绕组温升问题
UL60065温升对变压器绕组的判定:是否需要按照变压器的绝缘系统来判定?因为UL和IEC/EN有差异,有观点认为是“只认变压器绝缘系统,不认铜线材质等级的,即即是我的铜线是130度的,如果变压器没有绝缘系统认证,那按照75K来判定”。但是标准里面的表格提到Coil winding wires and insulation systems,所以个人理解是对于铜线可以认铜线材质等级,不需要一定要按照变压器的绝缘系统来判定,大家的意见呢?这是个好问题,有没有高手来解答。 没有UL1446绝缘系统的认证的话默认是Class A系统 fasten 发表于 2012-7-2 10:02 http://bbs.angui.org/static/image/common/back.gif
没有UL1446绝缘系统的认证的话默认是Class A系统
有UL 1446的认证,不过是OBMW2 E239508, 2UEW。所以还是觉得是可以认可铜线本身的材质等级130度,即按照95K去判定,去除热带环境以及热电偶测量误差,75K的温升即可。 canghai 发表于 2012-7-2 10:33 static/image/common/back.gif
有UL 1446的认证,不过是OBMW2 E239508, 2UEW。所以还是觉得是可以认可铜线本身的材质等级130度,即按照 ...
OBMW2.E239508
Magnet Wire - Component
SHANTOU SHENGANG ELECTRICAL INDUSTRIAL CO LTD E239508
你这个是漆包线的部件认证,不是绝缘系统的认证。 fasten 发表于 2012-7-2 10:40 static/image/common/back.gif
OBMW2.E239508
Magnet Wire - Component
SHANTOU SHENGANG ELECTRICAL INDUSTRIAL CO LTD E239508
但是标准里面并没有提到一定是变压器的绝缘系统,而且是描述的铜线and绝缘系统 canghai 发表于 2012-7-2 10:51 static/image/common/back.gif
但是标准里面并没有提到一定是变压器的绝缘系统,而且是描述的铜线and绝缘系统
看看这个CCN的COA:
CONDITIONS OF ACCEPTABILITY
Consideration is to be given to the following Conditions of Acceptability when these components are employed in the end-use equipment:
1. Magnet wire has been investigated and Recognized for use as turn insulation in magnetic devices such as motors, transformers and the like. The use of this wire in applications where the wire alone is being relied upon as insulation between multiple windings, e.g., between the primary and secondary windings of a transformer, or as insulation to ground, has not been investigated. 2. Unless specifically indicated in the individual Recognitions, resistance to oil, chemicals, refrigerants, soaps, x-rays, ultraviolet light and the like, has not been investigated. 要按照绝缘系统来定在! fasten 发表于 2012-7-2 11:16 static/image/common/back.gif
看看这个CCN的COA:
CONDITIONS OF ACCEPTABILITY
多谢回答!这个CCA的COA在哪里可以查到? canghai 发表于 2012-7-2 13:58 static/image/common/back.gif
多谢回答!这个CCA的COA在哪里可以查到?
看综合认证版块的教程。
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