談天說地主旨 ﹝請按主旨作出回應﹞ | 寄件者 | 傳送日期 |
[#1] USB入牆插座平貴有分別 British General rubbish no brand |
BB1668 會員 113.xxx.xxx.119 |
2020-09-06 03:06 | |
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[#2] USB入牆插座平貴有分別 I didn't watch the complete footage. Anyway, one would disconnect the electronics prior to 500V meggar test.(otherwise, damage) Should test at lower voltage as per industrial practice for complete unit. Got expensive electromagnetic flowmeter, up to 2m dia. electronics were tested only at reduced voltage., say 125V. Otherwise, causing hundreds of thousands to replace. Got Sanwa analogue insulation tester with 125/250/500V range. But what if for first commissioning of the electrical wiring, need 0.5 M minimum 500V for fixed installation? 最後修改時間: 2020-09-06 07:45:42 |
alexanderkoo 正式會員 223.xxx.xxx.64 |
2020-09-06 07:42 |
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