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PSTB210-690-70

The ABB PSTB210-690-70 is a Type 1+2 Combined Surge Protective Device (SPD) from ABB's PSTB series, specifically engineered for 690V AC three-phase power systems. This device serves as primary surge protection at service entrances and main distribution boards in industrial environments with higher voltage distribution networks, offering enhanced protection capacity against direct lightning strikes and severe switching surges.

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Technical Parameters Parameter Specification / Value Standard Compliance IEC/EN 61643-11 Protection Classification Type 1 + Type 2 Combined (Class I + II) System Configuration 690 V AC, 3P+N (TN-S, TT systems) Rated Voltage (Un) 690 V AC (±10%) Maximum Continuous Voltage (Uc) 320 V AC (L-N) / 420 V AC (L-L) Lightning Impulse Current (Iimp) 10/350 µs 25 kA (per mode) Nominal Discharge Current (In) 8/20 µs 21.0 kA (per mode) Maximum Discharge Current (Imax) 8/20 µs 50 kA (per mode) Voltage Protection Level (Up) @ In ≤ 2.8 kV (Line-Neutral) Response Time < 100 ns Short-Circuit Withstand According to IEC 61643-11 (typically 25 kA) Recommended Backup Protection 125A gL/gG fuse (consult installation manual for exact rating) Connection Terminals Line/Neutral: 16-70 mm² Earth/PE: 25-70 mm² (copper) Insulation Coordination Enhanced for 690V systems (clearance: ≥5.5mm, creepage: ≥12.5mm) Housing Protection 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=OK, red=fault) Mounting DIN-rail mountable (35 mm) Dimensions (H×W×D) ~ 288 × 90 × 75 mm (confirm with official datasheet) Weight Approximately 2.8 kg Model Interpretation PSTB: Product series 210: Discharge capacity (21.0 kA In) 690: Voltage rating (690V system) 70: Configuration code