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PST175-600-70

The ABB PST175-600-70 is a Type 1+2 Combined Surge Protective Device (SPD) from ABB's PST series, designed for 400V AC three-phase power systems. This device serves as the primary surge protection at main distribution boards, providing robust defense against both direct lightning effects and high-energy switching surges in industrial and commercial electrical installations.

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Technical Parameters Parameter Specification / Value Standard Compliance IEC/EN 61643-11 Protection Type 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) 255 V AC (L-N) / 320 V AC (L-L) Lightning Impulse Current (Iimp) 10/350 µs 25 kA (per mode) Nominal Discharge Current (In) 8/20 µs 17.5 kA (per mode) Maximum Discharge Current (Imax) 8/20 µs 40 kA (per mode) Voltage Protection Level (Up) @ In ≤ 2.0 kV (Line-Neutral) Response Time < 100 ns Short-Circuit Withstand According to IEC 61643-11 Recommended Backup Protection 100A gL/gG fuse (consult installation manual for exact rating) Connection Terminals Line/Neutral: 16-50 mm² Earth/PE: 25-50 mm² (copper) Auxiliary Contacts Not standard (optional accessory may be available) Protection Degree IP20 (for indoor enclosure mounting) Operating Temperature -40°C to +80°C Storage Temperature -40°C to +85°C Status Indication Visual window with color flag (green/red) Mounting DIN-rail (35 mm) Dimensions (H×W×D) ~ 288 × 72 × 62 mm (confirm with official datasheet) Weight Approximately 2.2 kg Model Interpretation PST: Product series 175: Discharge capacity (17.5 kA In) 600: Iimp = 25 kA 70: Configuration code