The modular lightning protectors of type OF ensure the protection of the electric systems against overpressures being able to appear on their feeding circuit per (effect of the lightning), or of operation stormy weather of coupling on the network (industrial parasites).

Protection is ensured thanks to a spark-gap strong capacity of flow, able to run out with the ground a current of 150 kA without suffering damage.
This module associated with models DGV, makes it possible to constitute a very effective protection in mode common mode differential according to the wiring diagram "C2" of guide UTE 15-443 (still called "3 1").

The lightning protector OF is used for protection upstream of the networks single-phase currents or three-phase particularly exposed (lightning protector of the type 1). It is installed with the TGBT of the installation. It is exclusively intended to be cabled between neutral (NR) and ground (EP) in partnership with lightning protectors DGV, connected to them-even between phase and neutral.