The Schneider Electric Acti 9 iST 3P+N 65kA is a Type 2 (Class II) Surge Protective Device from the iST series. It provides robust surge protection for three-phase systems with its 3P+N configuration and a very high 65kA nominal discharge current per mode. This model is engineered for high-risk or demanding applications where high surge current capacity and reliability are paramount.
Specifications
Parameter Specification
Product Series Acti 9 iST
Model iST 3P+N 65 (65 indicates Iₙ = 65kA)
Type / Class Type 2 (Class II) – For main or sub-distribution level protection.
Configuration 3P+N – Protects the three phases (L1, L2, L3) and the Neutral against Earth.
Nominal Discharge Current (Iₙ) 65 kA (8/20 µs wave, per mode)
Max. Discharge Current (Iₘₐₓ) 130 kA (8/20 µs wave, per mode)
Voltage Protection Level (Uₚ) ≤ 1.5 kV (at Iₙ, typical for 230/400V systems)
Rated Voltage (U꜀) 275V AC (L-N) / 440V AC (L-L) for 230/400V TN-S, TN-C-S, TT systems.
Response Time < 25 ns
Backup Protection Requires an appropriately rated external fuse or circuit breaker (e.g., 80A-125A gG/gL type as per instructions).
Status Indication Visual indicator: Green (OK) / Red (Fault/End of Life).
Remote Signaling Optional remote alarm contact (often available as an accessory).
Mounting DIN Rail (35 mm)
Width 72 mm (4-module width)
Standards IEC/EN 61643-11, CE, RoHS
Operating Temperature -40°C to +80°C