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PSTB570-600-70

The ABB PSTB570-600-70 is a Premium High-Capacity Type 1+2 Combined Surge Protective Device (SPD) from ABB's PSTB series, engineered for 400V AC three-phase power systems. This device represents the ultimate standard-model surge protection for mission-critical infrastructure, providing maximum surge current handling capability against direct lightning strikes and extreme switching surges in demanding commercial and industrial environments.

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Technical Parameters Parameter Specification / Value Standard Compliance IEC/EN 61643-11, IEC 61643-31, IEEE C62.41, UL 1449 4th Edition Protection Classification Type 1 + Type 2 Combined (Class I + II) System Configuration 400 V AC, 3P+N (TN-S, TT, TN-C-S systems) Rated Voltage (Un) 400 V AC (±10%) Maximum Continuous Voltage (Uc) 350 V AC (L-N) / 440 V AC (L-L) Lightning Impulse Current (Iimp) 10/350 µs 25 kA (per mode) Nominal Discharge Current (In) 8/20 µs 57.0 kA (per mode) Maximum Discharge Current (Imax) 8/20 µs 120 kA (per mode) Voltage Protection Level (Up) @ In ≤ 2.7 kV (Line-Neutral) Response Time < 100 ns Short-Circuit Withstand 60 kA RMS (per IEC 61643-11) Recommended Backup Protection 400A gL/gG fuse or equivalent MCCB (consult installation manual) Connection Terminals Line/Neutral: 70-185 mm² Earth/PE: 95-185 mm² (copper) Auxiliary Contacts Standard 2 changeover contacts (NO/NC) for remote monitoring Housing Protection IP20 (for indoor enclosure mounting) Operating Temperature -40°C to +85°C Storage Temperature -40°C to +90°C Altitude Rating Up to 4000 m without derating Status Indication Multi-color LED + mechanical flag + remote contact signaling Mounting Heavy-duty DIN-rail (45 mm) or direct panel mounting with seismic brackets Dimensions (H×W×D) ~ 420 × 130 × 95 mm (confirm with official datasheet) Weight Approximately 5.8 kg Model Interpretation PSTB: Product series 570: Discharge capacity (57.0 kA In) 600: Iimp = 25 kA 70: Configuration variant