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wongxx008 发表于 2017-5-2 15:31
2 ] N$ u6 b N; x有2种直流输出,一种是12V 8.3A带保护器,还有一种是USB形式的输出,线也是接在前面这个绕组上的,电压3v ... 7 G9 J5 Q6 s: K3 y2 A
7.2.1 是这样描述的:
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Overcurrent protection shall be provided where the current in any circuit can exceed either the rating of any component or the current carrying capacity of the conductors, whichever is the lesser value. The ratings or settings to be selected are detailed in 7.2.10.
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有要求每个回路都要加过流保护吗?
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问题是当无的所谓 USB 当过载或短路时, 你的回路上零会否过热或超出正常容额定工作参数? |
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