Combined arrester type 1 + type 2 + type 3 in accordance with EN 61643-11 for TT and TN-S systems (3+1 circuit) with 230 V power supply (N and L) each for RfZ / APZ in accordance with VDE-AR-N 4100. Including a single-pole B6 circuit breaker for the power supply of the intelligent measuring system in accordance with VDE-AR-N 4100, with sealable protective cover, for use on the 40 mm busbar system in the main power supply system in accordance with DIN VDE 0100-443 in buildings with an external lightning protection system (lightning protection class III/IV). 2 x socket and 2 x plug for easy wiring of the intelligent measuring system are included in the scope of delivery.