LINK BOX
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Link boxes are used at the end of cable termination to gain easy access to the cable metallic sheath and to limit the transient over-voltage induced on the metallic sheath by light, switching operations and fault currents. Cross bonding(C.B) link boxes allow metallic sheath to be transposed at cable joints with surge voltage suppression and reduction of circulation current. Sheath voltage limiters (SVLs) in link box are the gapless ZnO arresters, which have the insulation resistance above 100MΩ at test voltage so that the sheath insulation can be checked without disconnecting SVLs
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