Lightning protection

LLPD d69z up to 72,5 kV (DLS)

  • Protection against DLS, BFO
  • Highest voltage for equipment, kV 72.5
  • Maximum prospective fault current, kA 5.0
  • Lightning discharge capability, C 2.8
  • Installation 1, 2 or 3 pcs per pole
  • LLPD d69z up to 72,5 kV (DLS)
  • LLPD d69z up to 72,5 kV (DLS)
  • LLPD d69z — копия.png
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LLPD d69z

This device is there to protect important networks from direct lightning strikes and back flashovers. Indented to be installed along the protected line, it works perfectly on distribution (sub-transmission) lines with the highest voltage of equipment up to 72.5 kV.

d69z ensures lightning protection of insulators from flashovers as well as overhead lines from power outages caused by insulation flashover and subsequent fault current flow.

Line lightning protection device d69z has successfully passed different tests in a number of laboratories, including a full series of test at CESI (Milano) in 2019, which confirms its ultimate reliability. It also enables the expected life time to be up to decades.

Operational principle

This product operates on the basis of EasyQuench technology.

d69z can easily be adapted to poles/towers of totally different configuration. This is possible due to various installation options.


  • Highest voltage for equipment, 72.5 kV
  • Protects from Direct Lightning Strike
  • Protects from Back Flashover
  • No maintenance is required

Parameters of product

Electrical line parameters

Highest voltage for equipment*, kV 72.5
Maximum prospective fault current, kA 5
External air gap, mm 80+80+120
50% flashover voltage (75+75+115 mm air gap), kV <400
Power frequency withstand voltage**,  kV (wet/dry) 140/140

Lightning parameters

    Lightning discharge capability  (200 μs)***, C 2.8
     High current impulse (4/10 μs), kA 65
     Maximum quenching lightning current,  kA 20  (8/50µs)
     Minimum withstand amount of operations 10

General Parameters 

Additional power losses on the line, % 0
Average expected lifespan, years 30
 UV resistance****, h 1000
 Weight, kg 9.3
  Maintenance 1 visual verification/  year

* According to IEC 60038, ** According to IEC 60071-1, *** According to  IEC 60099-8, **** According to ISO 4892-2, method A, IEC 62217


Tension insulation

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Suspension insulation

LLPD d69z 3a — копия.png

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