安规网

 找回密码
 注册安规
安规论坛 | 仪器设备 | 求职招聘 | 国家标准 公告 | 教程 | 家电 | 灯具 | 环保 | ITAV 签到 充值 在线 打卡 设备 好友| 帖子| 空间| 日志| 相册
IP淋雨机 | 证书查询 | 规范下载 | 资质查询 招聘 | 考试 | 线缆 | 玩具 | 标准 | 综 合 红包 邮箱 打卡 工资 禁言 分享| 记录| 道具| 勋章| 任务
水平垂直燃烧机 | 针焰 | 灼热丝 | 漏电起痕
IP防水防尘设备|拉力机|恒温恒湿|标准试验指
灯头量规|插头量规|静风烤箱|电池设备|球压
万年历 | 距元旦节还有
自2007年5月10日,安规网已运行
IP淋雨设备| 恒温恒湿箱| 拉力机| 医疗检测设备沙特Saber 埃及COI 中东GCC|CoC直接发证机构水平垂直燃烧机|灼热丝|针焰试验机|漏电起痕试验机
灯头量规|试验指|插头插座量规|灯具检测设备耐划痕试验机|可程式恒温恒湿试验箱 | 耦合器设备广东安规-原厂生产-满足标准-审核无忧
查看: 890|回复: 0

[CONT] DSH 613 The air speed in the low temperature test cabinet for testing voltage ma

[复制链接]
发表于 2012-9-4 14:02 | 显示全部楼层 |阅读模式
广东安规检测
有限公司提供:
DSH 613
, R: d" E2 \# q

9 x& M2 F$ {/ S* ^0 [7 [$ H; ~/ O- Y7 g
The air speed in the low temperature test cabinet for testing voltage maintained thermal cut-out
/ x$ ]/ O" ^& Y: h; _. A/ |
17.16.1084 f+ P" ]3 T* K: [) c5 Q1 u0 h7 ^
60730-2-9(ed.1)  n3 f! n4 A+ l% V- n0 g
% k' d! O/ Q( o; N5 O
Question:+ I9 t' G& R$ v; X4 x; m/ [
In practice, it is found that the test results were dramatically affected by the air speed of the cabinet when conducting the test of clause 17.16.108 of IEC 60730-2-9:2004, Ed. 2.2 in operated condition.& B5 K$ J7 h# l0 j' `) O! O# ?; a. p' n
In the operated condition the contacts of the voltage maintained thermal cut-out remain open position by the heat generated by the PTC element. The faster the air speed in the test cabinet, the more heat generated by the PTC taken away by the air flow. This will reduce the temperature of the thermal cut-out which will make the thermal cut-out close.
  O( \* G, q4 H, q' D2 {4 nDecision:) x" {' [  K% E: C' _
The test should be conducted in a static-air test cabinet or in a box which protects the samples from the air flow." [" v) i4 ]$ F2 _2 w
The required temperature (- 20°C) should be measured 50 mm beside the test samples (similar to the requirements according to clause 14.7 of IEC 60730-1)% m7 s9 B* p- k1 N" `; `  c
During the examination of several samples in the test cabinet or box it is to be observed that the samples don't affect themselves among each other.* s" H* ?* J$ [5 F; c  i8 U

6 D: |" N4 s2 y( A9 Z. {- M. J- b& A2 @& F; l! C

- a8 r- Z3 z7 V( x0 i. b

本帖子中包含更多资源

您需要 登录 才可以下载或查看,没有账号?注册安规

x
您需要登录后才可以回帖 登录 | 注册安规

本版积分规则

关闭

安规网为您推荐上一条 /1 下一条

QQ|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网 ( 粤ICP13023453-10 )

GMT+8, 2024-12-28 12:19 , Processed in 0.088222 second(s), 26 queries .

Powered by Discuz! X3.4

© 2001-2023 Discuz! Team.

快速回复 返回顶部 返回列表