NA-Schutz-NA4105-PV-172.5KVA-TNS_TT_1.0, network and system protection for PV in the TNS / TT network, VDE-AR-N 4105:2018-11, all-pole separation, central NA protection and coupling switch for PV systems up to 155.3 KW / 172.5 KVA, (If the 135KW limit is exceeded, coordination with the network operator is required), mains backup fuse of type gG/gL required! (max. 315A), mains voltage 3 x 230/400V 50Hz, nominal current 250A (at cos phi 0.9), 225A (at cos phi 1), Noark - circuit breaker with motorized reclosure, wall mounting, GRP-reinforced polyester housing with screw cover, IP 54 for installation indoors or in protected outdoor areas (NO direct exposure to the weather!), max. ambient temperature 35°C!, dimensions (W x H x D) approx. 400 x 880 x 260 mm