In order to be able to disconnect the inverter from the electricity grid for replacement or repair, NEN1010 (provision 712.462.101) requires an isolator to be installed on the AC and DC circuits. This disconnector is clearly recognizable for laymen and disconnects the installation as a whole. If the separator is not in sight of the technician during work, it should be locked or have a warning sign. To indicate hazardous DC voltage, indication shall be provided at the connection of DC lines to equipment.
The switch-disconnector must comply with the requirements of NEN1010 (provision 712.462.101). Note: the switch-disconnector must be suitable for switching the maximum power.
Furthermore, the load break switches must be easily accessible and clearly identifiable.
At Conduct, we can provide both DC, and AC switch-disconnectors in our PVboxes, which are fully assembled according to the above standards. For the right choice of PVbox, please contact one of our colleagues.
To de-energize the PV system, the panels should be disconnected from the cabling in the event of a fire. If there are any DC cables that are always live, this is a potential danger to firefighters. The Dutch Fire Brigade has indicated that in the event of a fire one should extinguish but not break out (i.e. enter the building). Conduct offers FireSwitch and FireRaptor for this purpose.