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Separate backup fuse not required

Document   •   May 20, 2016 13:45 BST

End devices are protected from surge voltage damage by means of type 3 device protection, and to do this, the device protector has to be protected with a suitable overcurrent protection device. Because the new type 3 arresters from Phoenix Contact’s SEC product family already have this protection built in, there is no need for a separate backup fuse.
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