I know there are lots of TVSS or SPD's (Transient Voltage Surge Suppressor or Surge Protection Device) on the market. But there has to be one that tops them all. I want to protect a service that has 480/277V,WYE, 3ph, 4W. I am looking at the incoming power switchgear which is 4000A. I could go downstream and protect field devices as well but I want to start at my incoming power.
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