Link Boxes are used for earthing and bonding cable sheaths of single core cables so that the induced voltages and circulating currents are eliminated or reduced. Single core cables in operation carry alternating currents and induced voltages in the metallic sheath of the cable. These currents may cause,
depending from the sheath bonding, circulating currents flowing in the cable sheath which reduce the transmission capacity of the cable and cause an additional heating.
TE Connectivity’s Raychem link boxes have reliable design and the housing is made of stainless steel. The enclosure is water and dust tight type tested to fulfil the requirements of protection class IP68 for installations below ground. For other applications, e.g. indoor installation, link boxes with less protection class are also available. Designs are capable to
withstandings different electrical demands for several voltage classes. The link box lid is lockable by a standard security deadlock. The optional sheath voltage limiters (SVL) are made of zinc oxide and are designed to meet the requirements of IEC 60099-4. Link boxes with SVLs are available for different voltage classes and provide active over-voltage protection
that contributes directly to improved reliability of the system.