标题: 关于UL电水壶的电气结构问题 [打印本页] 作者: prod10 时间: 2010-12-5 00:10 标题: 关于UL电水壶的电气结构问题 本厂有款产品使用Strix温控器的,底座是PCB程序控制,带保温功能的,但是UL那边说结构需要增加一个温度Fuse熔断保护,才合格;但我不知道这是那个标准条款提出的,请指点;若是CSA标准提及的,请指出具体条款出处。谢谢。作者: liscsupor 时间: 2010-12-5 09:23
可以直接咨询负责项目的工程师啊!作者: tiny 时间: 2010-12-5 19:30
没看过ul标准,但从你的描述来看。应该是跟iec60335中19.5的要求一样的,两个温控装置分别在器具的发热元件两侧才行。否则作软件评估。作者: Liu 时间: 2010-12-5 19:44
是否是指UL499的18 Overcurrent Protection of Conductors and Heating Elements? . J: V' H# O4 p6 ^7 }那个不是温度保险,是电流保险。 7 {( Q% J5 |$ G9 `+ N# W. e* K& e# m: \* O$ }2 B: ^6 S" w* {' Y" n5 g
加拿大要求是:CAN/CSA-C22.2 No. 64-M91 (Reaffirmed 1999) 7 k+ v% Z( V; f. z4.13 Protection Against Overheating7 w3 Y* {9 P( w7 t8 B
4.13.14 F: v+ u3 W' [/ u; @. x$ F
Unless they can operate safely when dry, appliances intended to heat liquids that may be inadvertently operated when dry shall be provided with a protective device or devices that will open the power supply or reduce the power input to the heating element to prevent unsafe temperatures from being attained when the appliance is operated at the test voltage under such abnormal conditions. % O$ _8 d# K( e THeating elements shall not be considered as protective devices