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Line Surge Arrester PEXLINK

Transmission-line protection for disturbance-free system operation up to 800 kV

PEXLINK is a concept of Line Surge Arrester (LSA) for minimizing disturbances on overhead lines resulting from unforeseen impulse overvoltages. Based on Hitachi Energy's silicone-housed PEXLIM arrester, together with line-hardware and automatic disconnecting device, the PEXLINK concept offers secure and robust performance to improve line availability and security of electricity supply.


  • Protection of over-head lines 
  • Increasing line availability 

Why Hitachi Energy?

  • Minimum maintenance cost
  • Customizable mechanical and electrical design
  • Easy to install
  • Well-proven PEXLIM surge arresters
  • Automatic disconnecting device

Get to know more

The concept of protection using polymer-housed arresters along with additional accessories for fixing the arresters across the insulators and providing automatic disconnection of the arresters in the event of their being overstressed is called the PEXLINK concept. This method is simple and cost- effective.

Using Hitachi Energy's standard PEXLIM arrester

Hitachi Energy's philosophy is to provide protection for line insulation at selected locations. The main item is the gapless silicone polymer-housed arrester, PEXLIM with metal-oxide (MO) active elements. Such arresters have been used for many years for protection of equipment in sub-stations and hence their protective performances well-known. The low weight of the PEXLIM arrester permits installation on existing structures and the polymer housing gives increased safety of the line equipment as well as people and animals which may be in the vicinity of the lines during overstress conditions.

Disconnecting Device

To ensure quick, safe, automatic and controlled disconnection of a failed arrester, Hitachi Energy uses a special disconnecting device with a suitable link in the ground circuit of the arresters.