UL1993 对于PCB的间隙要求
UL1993对于PCB的间隙没有要求，满足耐压测试即可？ 有呀in primary circuits,1.5mm minimum spacing are maintained through air and 3.0mm minimum spacing are maintained over surfaces between the current-acrrying parts of opposite polarity on PCB of power unit.And 1.2mm minimum spacing are maintained through air and over surfaces of insulating material between current-carrying parts of opposite polarity and between such current-acrrying parts and dead-metal prats or low voltage isolated circuits. 引用第1楼babyliss于2011-06-16 14:49发表的:
有呀
in primary circuits,1.5mm minimum spacing are maintained through air and 3.0mm minimum spacing are maintained over surfaces between the current-acrrying parts of opposite polarity on PCB of power unit.And 1.2mm minimum spacing are maintained through air and over surfaces of insulating material between current-carrying parts of opposite polarity and between such current-acrrying parts and dead-metal prats or low voltage isolated circuits.
是啊，我就觉得奇怪啊，我是在以份培训资料里看到说满足耐压就可以了 有要求，电气间隙，和爬电距离都有要求，不只是满足耐压 babyliss 发表于 2011-6-16 14:49 static/image/common/back.gif
有呀
in primary circuits,1.5mm minimum spacing are maintained through air and 3.0mm minimum spacing...
这个是哪个标准的啊 hzj101988 发表于 2013-5-23 17:27 static/image/common/back.gif
这个是哪个标准的啊
服了你，这个也被你翻出来了
LED灯泡的PCB没有距离要求，满足耐压即可 UL 1993
A ballast for high-intensity discharge lamps shall comply with the
requirements of UL 1029 and UL 935.
6.4.2 A ballast not previously investigated as described in Clause 6.4.1 shall be evaluated in the device.
The construction requirements of UL 935 or CSA C22.2 No. 74 or NOM-058-SCFI shall apply. See the
appropriate standard for details on coil insulation materials, thermal and overcurrent protective
components, printed wiring boards, and spacing of electrical parts on the printed wiring board.
clause 6.6 and table 6.1.
and LED lamp for ul 8750clause 7.7 and table 7.4。
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