[KongchangAI]
Unverified82% confidenceDecision RuleTime unknown

三相系统优先选4P(3+1模式,TN-S系统)或按接地形式匹配保护模式:TN系统用L-N/N-PE共4条路径,TT系统需选带间隙的3+1结构,模式选错会导致漏电保护误动作或防护失效

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82%
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Long-term
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