Grounding System Design Of Surge Protector
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According to national standards GB2887-2000 "Electronic Computer Field Standard" and GB50174-2008 "Computer Room Design Specifications," computer room surge protective device should have the following four types of grounding: DC, AC operating, AC protection for computer systems, grounding, and lightning protection.
The resistance of each grounding system for surge protector is as follows.
The DC current of computer system equipment is less than 1 Ω compared to the card cache.
The exchange card must be greater than 4 Ω for redemption.
If you do not want to include lightning protection for surge protection device, the card must be 10 Ω higher than the redemption card.
Cards with an omega greater than 4 can be redeemed at the exchange location.
