Snow Removal Unit SRU
The SRU utilizes the weight of the snow itself to clear the power lines. When reaching a pre-set threshold, the SRU gives the line a sudden impact, making the snow fall off. Afterwards, the SRU resets itself and is ready to repeat the process again – and again.
Currently mounted in
Norwegian 22 KV and 66 KV lines
Purely mechanical. No electricity or external power required.
Current pulldown weight on lines
Lowest 40 kgs
Highest 150 kgs
Position in chain
Either above or below the insulators.
Currently: 16mm and 20mm
Construction max load
The SRU is mounted in the same way as an insulator.
Time of year, mounting
All year. Summer is best :-)
The SRU does not target ice, but removes snow before it turns into ice.
The concept is developed for lines running below the cross arms. Not raised above.
The release removes snow in both directions from the pole. 1 unit per line is recommended, but we have seen releases removing snow from parallel lines.