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question about GPU plugs

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Old 1st Jun 2010, 23:55
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Question question about GPU plugs

Hello,
Could someone provide me with the explanation as to why on a GPU plug there are 2 anti flash pins for 3 phase AC current while there is only one for DC current ?
Thanks
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Old 2nd Jun 2010, 02:07
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Because the ground power breaker is controlled with DC therefore you need a separate DC interlock supply for the AC plug, hence the two pins. Power goes in, power comes out!
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Old 2nd Jun 2010, 02:30
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seems obvious now thx for the answer
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