Selecting the correct transient protection for your installation is easy:
CATEGORY C / TYPE 1 (Service Entrance)
XAS – 500, 400, 300 KA
CATEGORY B / TYPE 2 (Branch Panel)
XDS – 150 or 200 KA
CATEGORY A / TYPE 3 (Point of Use)
SPDee – 50 KA
XMS – 72 KA