[KongchangAI]
Unverified90% confidenceDecision RuleTime unknown

电源SPD选型需遵循分级保护:进户总配电箱选T1类(Iimp≥12.5kA,10/350μs波形),楼层分配电箱选T2类(In≥20kA,8/20μs波形),末端敏感设备选T3类,仅靠一级防护会因残压过高损坏后端设备

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