标题: 关于UL5085-3 第33.1章节的温度要求 [打印本页] 作者: jjlamshushushu 时间: 2014-2-17 09:37 标题: 关于UL5085-3 第33.1章节的温度要求 本帖最后由 jjlamshushushu 于 2014-2-17 09:41 编辑 & Q2 G1 z0 ?$ s5 |: K8 Y6 t1 T! B# a9 T6 L6 f% r h
各位，下面摘录章节的红色字部分如何理解？ t, U4 H2 U; L) F* T比如，变压器的工作环境温度为105°C,那么这个Overheating Test就应该在105°C环境下进行吗？ ( r n. g( T/ U% ^ 在IEC61558里，这点是很明确的，但UL5085-3标准里就不太明白；2 \& |# @" a- S1 a3 C
现在我们有一款UL5085-3的变压器，在25°C下进行冷态短路测试出现冒烟流脓现象（保护装置失灵），# |6 F4 ^" `4 d! s1 @' d7 H. N% @
而在105°C环境温度下进行温升稳定以后再热态短路测试就是正常的（正常保护了），6 O7 Q) k8 I M( x5 U2 Z' e
请问，这种变压器算合格吗？ 欢迎大神们指点迷津，谢谢！！！. q# R8 y0 r7 h% @$ `1 y
--------UL 5085-3 Clause 33 Overload Heating Test ; T" y7 w9 U+ D c33.1 General . B" r% {& G* {& v. E3 n8 e) I33.1.1 The transformer shall be subjected to the overload tests described 2 q+ Z+ Q4 j" x
in Clauses 33.2.1 – 33.2.8, asspecified in Tests in Clause 18. & F, B0 \" `% ^: |6 H, ~; O3 ?A protective device that is relied upon to open the circuit as a result of the4 c" k b" `# {: W1 x7 Q7 c7 `( |
tests shall be one that has been investigated for this purpose. $ `! S M' e0 G- R+ T/ Y3 \7 X33.1.2 The temperature rises specified shall be based on an assumed ambient temperature of 25°C/ [, c' X1 Z$ E, K
(77°F), but a test may be conducted at any ambient temperature of 21 – 30°C (70 – 86°F). # [2 B2 v6 {% N
If the operationof an automatic thermal control during the test limits the temperatures under observation, 0 U6 [$ ~1 {( D9 f5 m
no temperature higher than 25°C plus the specified maximum rise shall be acceptable.2 m0 ?, R( K) S& V6 J/ `% \# I
+ q& e" X1 J, @4 }; q% Q8 o2 O" K6 m h B3 k 作者: jjlamshushushu 时间: 2014-2-17 13:33
This problem is unpopular，作者: jjlamshushushu 时间: 2014-2-17 15:45
顶一下，别沉下去了