Electrical Disconnection Systems
SIS Underground is an electrical disconnection system designed specifically for isolation of individual illuminated columns. Each pole or column is fitted with a small sensor that, in the event of impact, communicates with the monitor board triggering complete LV and ELV isolation within 0.2 seconds.
The SIS Underground unit is housed within an IP67 enclosure and located on an equipment shelf inside an underground STAKKAbox™ Access Chamber, near to the column it is protecting. The system is fully compliant with EN12767:2007 (Electrical Isolation of Passively Safe Structures) and can be used with any type of passively safe column.