Technical Parameters Parameter Specification / Value Standard Compliance IEC/EN 61643-11 Ed.3, IEC 61643-31, IEEE C62.72, UL 1449 4th Ed., IEC 60068 (complete) Protection Classification Type 1 + Type 2 Combined (Class 0 + I + II) System Configuration 400 V AC, 3P+N+PE (TN-S, TT, IT, TN-C-S systems) Rated Voltage (Un) 400 V AC (+10%/-15%) Maximum Continuous Voltage (Uc) 440 V AC (L-N) / 520 V AC (L-L) Lightning Impulse Current (Iimp) 10/350 µs 25 kA (per mode, all poles) Nominal Discharge Current (In) 8/20 µs 72 kA (per mode) Maximum Discharge Current (Imax) 8/20 µs 150 kA (per mode) Voltage Protection Level (Up) @ In ≤ 2.9 kV (Line-Neutral) Total Energy Absorption >250 kJ per phase Response Time < 100 ns (quantum primary stage) Follow Current Interruption < 1.2 ms Short-Circuit Withstand 100 kA RMS (1 second) Recommended Backup Protection 630A gL/gG fuse or equivalent ACB (see quantum installation manual) Connection Terminals Line/Neutral: 120-300 mm² Earth/PE: 150-300 mm² (copper/copper-clad aluminum) Insulation Coordination IEC 60664-1 Overvoltage Category IV, Pollution Degree 3+ Auxiliary Contacts 4 independent quantum changeover contacts (16A/600V AC) Communication Interface Standard MODBUS RTU/TCP, optional PROFINET, EtherNet/IP Housing Protection IP20 / NEMA 3R (with nano-corrosion protection coating) Operating Temperature -50°C to +90°C (full military-grade range) Storage Temperature -55°C to +95°C Altitude Rating Up to 6000 m without derating Seismic Rating IEEE 693 (High Level Plus) - 1.5g horizontal, 1.0g vertical Status Indication Quantum tri-color adaptive array + mechanical flag + remote cloud signaling Mounting Seismic-rated quantum rail (45/75 mm) or direct panel with harmonic dampeners Dimensions (H×W×D) ~ 520 × 160 × 120 mm (verify with official quantum datasheet) Weight Approximately 9.2 kg Model Interpretation PSTB: Premium series 720: Discharge capacity (72 kA In) 600: Iimp = 25 kA 70: Quantum generation variant