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What is HV link box?

Table of Contents

  • What is HV link box?
  • What is Link box?
  • What is cross bonding of cables?
  • What is bonding cable?
  • Is 11kV high or low voltage?
  • Do you need cross bonding?

What is HV link box?

What Are Link Boxes? Link boxes are installed on medium/high voltage power systems in conjunction with MV HV Cable Joints & Terminations incorporating a sheath break to prevent sheath circulating currents and limit induced voltage in the cable screen using bonded systems up to 132kV.

What is Link box?

Link boxes are used with cable joints and terminations to provide easy access to shield breaks for test purposes and to limit voltage building up on the sheath. Lightning, fault currents and switching operations can cause over voltages on the cable sheath.

What is link box underground cable?

Link boxes are used for a range of high voltage cable systems. They provide a weather proof environment for the connecting links used for earthing or cross-bonding of the metallic sheaths of high voltage cables.

What are HV cables used for?

A high-voltage cable (HV cable) is a cable used for electric power transmission at high voltage. A cable includes a conductor and insulation.

What is cross bonding of cables?

Cross- bonding connections allow the reduction of problems due to the induced current circulation on metallic cable screen when MV cable systems are solidly bonded, i.e. simply connected to ground potential at the circuit ends.

What is bonding cable?

Cable bonding is basically the method of making electrical connection between the sheaths of two cables. Such electrical connection of sheaths may either be done at one end or at both the ends of the cable depending upon the application.

Why is cable Armour earthed?

The earthing functions that can be performed by the armouring of a cable. Whilst the primary function of the metallic armouring of an armoured cable is to provide overall strength, it may be used as a circuit protective conductor (cpc), main protective bonding conductor or, where practicable, an earthing conductor.

What is cross bonding?

Cross-bonding is a method of connecting cable conductors. Special joints allow to cross return conductors between phases in order to minimize losses.

Is 11kV high or low voltage?

High voltage (HV) – means and voltage exceeding 1kV a.c. or 1.5kV d.c. Extra high voltage (EHV) means any voltage exceeding 220kV….Standard line voltages.

Line Voltages Usage
240/480V (1 phase) Used to supply customers installations
6.6kV Used for urban and rural HV distribution
11kV
22kV

Do you need cross bonding?

If you can simultaneously touch an earthy metal object and an exposed-conductive-part then it is necessary to bond.

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