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: 1454|回复: 0

[UL认证] UL778

[复制链接]
发表于 2008-10-17 14:18 | 显示全部楼层 |阅读模式
广东安规检测
有限公司提供:
UL778中的Dielectric voltage-ithstand:
! r  }5 A; F6 r; t  k35.1.1 A pump shall with stand for 1 minute without breakdown the application of a 60-hertz, essentially sinusoidal potential:% n4 c( }" x5 ]% y2 r, r
a)Between live parts and grounded dead metal and
4 q9 p9 |- ]6 \b)Between the terminals of a capacitor used for radio interference elimination or arc suppression.The test potential shall be as follows:
+ M9 L, c0 |0 W! P1 U2 Z1)One thousand volts for a nonsubmersible pump rated no more than 250 volts, and no more than 1/2 horsepower(373 watt output).
9 K# U% d% v; }9 L2)One thousand volts plus twice the rated voltage for a nonsubmersible pump rated more than 250 volts, or more than 1/2 horsepower.4 p; }9 k; ~2 H* f9 n
3)One thousand volts plus twice the rated voltage for a submersible pump.
$ R' {9 F7 P* C' w0 h1 O8 ]
4 o7 U0 M, Q2 a) B; P35.1.2 The required test potential may be obtained from any convenient source of sufficient capacity at least 500 volt-amperes capable of maintaining the potential at the required test value except during breakdown.The voltage of the source is to be continuously variable.
2 w! r. N6 s9 }: z- _! e9 CException: A 500 volt-ampere or larger capacity transformer need not be used if the transformer is provided with a voltmeter to directly measure the applied output potential.
6 Z4 J" G# `( \4 h3 m" r; v1 V4 Z: p% d0 x6 P2 s/ [
35.1.3 In the case of a DC pump, the test potential is to be direct current.  U4 E* y* W5 p! H, M
8 y5 k2 Y) A( C8 L
看的不是很明白,那位高手幫忙指點指點。
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, 2024-11-26 02:40 , Processed in 0.061087 second(s), 20 queries .

Powered by Discuz! X3.4

© 2001-2023 Discuz! Team.

快速回复 返回顶部 返回列表