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.
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.
|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|
|Lightning discharge capability (200 μs)***, C||2.4|
|High current impulse (4/10 μs), kA||65|
|UV resistance****, h||1000|
* 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
|Type of tests
|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