Lightning protection


Maximum operating voltage24 kV
Protection typeAgainst indirect lightning
Protection for line, MOA
Installation1 product per pole
Choose file
Preview     20
Preview     20 sm
Preview     20

he SAi20z is intended for ensuring protection of Conductors and Insulators against indirect lightning strikes, installed on Section- and Termination Poles.

The SAi20z installed in association with Metal-Oxide-Arrester provides the best possible protection for distribution substations against lighting activity.

Operational Principle

The Operational Principle is based on the EasyQuench Technology.

Using the resistance of the ground between two poles, only one device needs to be installed per Pole.

This advantage makes to SAi20z a very cost effective solution to protect against more than 80% of the lightning issues.

Medium sai20z 3

Technical characteristics

Medium     20

Performance specifications

Maximum system operating voltage (MSOV), kV 24
Maximum prospective follow current, kA 2.6
Breaking follow current*, kA 1.5
External air gap, mm 70±10
50% flashover voltage**, kV 110
Minimum withstand power frequency voltage**, kV
Dry 40
Wet 30
Lightning discharge capability (200 μs)***, C 2.4
High current impulse (4/10 μs), kA 65
UV resistance****, h 1000
Weight, kg 1.0

* Maximum follow current that LLPD is capable of breaking (quenching) in case of shielding wire presence or 4W system with solidly grounded neutral at MSOV

** External air gap specified in the present table

*** According to IEC 60099-8

**** According to ISO 4892-2, method A, IEC 62217

Test Certificates

Type of tests
Laboratory Year
High current impulse withstand test CESI (Milan, Italy) 2014
Lightning discharge capability test CESI (Milan, Italy) 2014
Standard Lightning Impulse Sparkover Test CESI (Milan, Italy) 2014
Impulse Withstand Test CESI (Milan, Italy) 2014
Temperature Cycling Test Salt Mist Test CESI (Milan, Italy) 2014
Vibration test CESI (Milan, Italy) 2014
Follow current interrupting test STRI (Witness test in Streamer's laboratory) 2014


Using bracket BPD.23

Using bracket BPD.38

Using bracket BCL.141