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Link Boxes

Applications

  • Direct grounding
  • Single point bonding
  • Cross bonding
  • Cross bonding and transposition
  • Sheath voltage limiters (SVL)

Features

  • Compact design
  • IP 65 Protection *
  • Made from Stainless steel
  • 1-phase and 3-phase type
  • Bonding Lead Size 95-300 Sq mm
  • Buried & Non Buried Application
  • With & Without Sheath voltage limiters (SVL)
  • With & without removable links
  • Can be used with concentric cables or single core cables
* Higher protection available on request

Standards Reference

  • ANSI/IEEE STD 575-1988
  • IP68 test IEC 60529
  • DC test as per IEC 60060-1-1989
  • Lighting Impulse test as per IEC 60230-1966
  • Short Circuit test 40kA for 1 Sec RMS

Link Box is electrically and mechanically one of the integral accessories of HV underground and above ground cable bonding system, associated with HV XLPE power cable systems. Link boxes are used with cable joints and terminations to provide easy access to shield breaks for test purposes and to limit voltage build-up on the sheath.

Lightning, fault currents and switching operations can cause over voltages on the cable sheath. The link box optimizes loss management in the cable shield on cables grounded both sides. In HT Cable the bonding system is so designed that the cable sheaths are bonded and earthed or with SVL in such way as to eliminate or reduce the circulating sheath currents.

Link Boxes are used with cable joints and terminations to provide easy access to shield breaks for test purposes and to limit voltage build-up on the sheath. The link box is part of bonding system, which is essential of improving current carrying capacity and human protection. The various type of bonding methods using link boxes are categorized in the pdf file below

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