DEHNshield ZP B2 TT 255 Combined arrester for TT and TN-S systems for use in the main power supply system (3+1 circuit) in residential buildings without external lightning protection (also with overhead line feed). DEHNshield ZP (3rd generation) Combined arrester type 1 + type 2 + type 3 according to DIN EN 61643-11 Simple, quick and completely tool-free installation thanks to Click + Power connection technology for busbar contact and partly push-in earthing terminal Powerful and end device-friendly RAC spark gap technology Perfect solution for the requirements of VDE-AR-N 4100 and 0100-443/534 Space-saving design thanks to narrow width of partly only 38 mm for compact use with feed adapter or integrated circuit breaker As SG or LSG variant with integrated overcurrent-protected 230 V power supply (L and N) for RfZ and APZ in accordance with VDE-AR-N 4100 Protects the entire electrical system as close as possible to the feed point Function monitoring of all protection paths and mechanical defect display by green-red marking in the viewing window Switch-off selective for fuses from 35 A gG up to 25 kAeff short-circuit current Meets the requirements for lightning current discharge capacity in accordance with DIN0100-534 Technical data: SPD in accordance with EN 61643-11 / ... IEC 61643-11 Type 1 + Type 2 + Type 3 / Class I + Class II + Class III Energetically coordinated protective effect to the end device (10 m) Type 1 + Type 2 + Type 3 Nominal voltage AC (UN) 230 / 400 V (50 / 60 Hz) Highest continuous voltage AC (UC) 255 V (50 / 60 Hz) Lightning impulse current (10/350 s) [L1+L2+L3+N-PE] (Itotal) 30 kA Lightning impulse current (10/350 s) [LN] (Iimp) 7.5 kA Specific energy [LN] (W/R) 14.06 kJ/Ohm Lightning impulse current (10/350 s) [N-PE] (Iimp) 30 kA Specific energy [N-PE] (W/R) 225 kJ/Ohm Nominal discharge current (8/20 s) [LN]/[N-PE] (In ) 20 / 80 kA Protection level [LN] (UP ) 1.5 kV Protection level [N-PE] (UP ) 1.5 kV Open circuit voltage of the hybrid generator (UOC ) 20 kV Max. mains-side overcurrent protection 160 A gG TOV voltage [LN] (UT) characteristic 440 V / 120 min. withstand TOV voltage [N-PE] (UT) characteristic 1200 V / 200 ms withstand Operating temperature range (TU ) -40 °C ... +80 °C Function / defect indicator green / red Number of ports 1 Connection cross-section (PEN, 9) 16-25 mm2 stranded Installation on 40 mm busbar system Housing material thermoplastic, color red, UL 94 V-0 Installation location indoors Protection class IP 30 (with cover) Approvals VDE Protection level [L-PE] (UP ) 1.6 kV
