中国可靠性论坛

 找回密码
 -注 册-

扫一扫,访问微社区

QQ登录

只需一步,快速开始

搜索
热搜: MTBF GJB MIL FMEA
查看: 694|回复: 0

问两个关于ECAP应力测试的问题

[复制链接]

该用户从未签到

发表于 2018-2-5 11:18:30 | 显示全部楼层 |阅读模式
求高手解答,Damp Heat Steady State Test 和 Pressure relief vent,这两项测试是什么意思?翻译一下,简述一下这两项测试的方法和步骤过程。
Damp Heat Steady State Test
〔Conditions〕
Test temperature : +40±2℃
Relative humidity : 90 to 95%RH
Test time : 250 hours (Endurance time ≤2000H)
: 500 hours (Endurance time>2000H)
After completion of test, the capacitors shall expose in the atmospheric condition for 1 to 2 hours,
and then measurements shall be taken.
〔Criteria〕
Capacitance change : Within ±20% of initial value. (Endurance time≤2000H)
Within ±10% of initial value. (Endurance time>2000H)
Tan δ : Not more than 120% of the specified value
Leakage current : Not more than the specified value
Appearance : No leakage and damaged.
Pressure relief vent
Apply a reverse voltage with the DC current of 1 amp.(DC reverse voltage test)
When the pressure relief vent operated, the capacitor shall not flame although emission of
gas or a part of the inside element is allowable.
If the vent does not operate with the voltage applied for 30 minutes, the test is considered to be passed.
〔Criteria〕
No sparking; No shorting.
No breaking out of electrolyte paper;
Vent opening, no flowing down of electrolyte.
您需要登录后才可以回帖 登录 | -注 册-

本版积分规则

QQ|Archiver|手机版|小黑屋|中国可靠性网 ( 粤ICP备14066057号 )

GMT+8, 2018-11-15 18:00

Powered by Discuz! X3.2

© 2001-2013 Comsenz Inc.

快速回复 返回顶部 返回列表