Technical Parameters Parameter Specification / Value Standard Compliance IEC/EN 61643-11, IEC 61643-31, IEEE C62.41, UL 1449 4th Ed., IEC 60068 (environmental) Protection Classification Type 1 + Type 2 Combined (Class 0 + I + II) System Configuration 690 V AC, 3P+N+PE (TN-S, TT, IT systems) Rated Voltage (Un) 690 V AC (+10%/-15%) Maximum Continuous Voltage (Uc) 460 V AC (L-N) / 550 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 ≤ 3.8 kV (Line-Neutral) Total Energy Absorption >180 kJ per phase Response Time < 100 ns (primary stage) Follow Current Interruption < 1.5 ms Short-Circuit Withstand 80 kA RMS (1 second) Recommended Backup Protection 500A gL/gG fuse or equivalent ACB (see installation manual) Connection Terminals Line/Neutral: 95-240 mm² Earth/PE: 120-240 mm² (copper/copper-clad aluminum) Insulation Coordination IEC 60664-1 Overvoltage Category IV, Pollution Degree 3 Auxiliary Contacts 3 independent changeover contacts (10A/600V AC) Communication Interface Optional MODBUS RTU/Profibus DP for integration Housing Protection IP20 / NEMA 3R (with corrosion protection coating) Operating Temperature -45°C to +90°C Storage Temperature -50°C to +95°C Altitude Rating Up to 5000 m without derating Seismic Rating IEEE 693 (High Level) - 1.0g horizontal Status Indication Multi-stage LED array + mechanical flag + remote contact + communication Mounting Seismic-rated heavy-duty rail (45/75 mm) or direct panel with dampeners Dimensions (H×W×D) ~ 480 × 140 × 110 mm (verify with official datasheet) Weight Approximately 7.5 kg Model Interpretation PSTB: Premium series 570: Discharge capacity (57 kA In) 690: Voltage class 70: Configuration generation