| Item | Parameter |
|---|---|
| Model # | BY7-40/3+1-385X |
| Nominal System Operating Voltage Uo(V) | 230/400 |
| Maximum Continuous Operating Voltage Uc(V) | 385 |
| Nominal Discharge Current In (kA) | 20 |
| Maximum Discharge Current Imax (kA) | 40 |
| Voltage Protection Level Up (kV) | L-N 1.8, N-PE 1.5 |
| Rated Short-Circuit Current Isc (A) | 800 |
| Local Failure Indication | Green window: Normal; Red window: Failure |
| Fault Alarm Contact | One pair of normally open and normally closed contacts |
| Response Time | L-N 25 ns, N-PE 100 ns |
| Insulation Resistance | ＞50 MΩ |
| Wiring Capability | 4～35 mm2 |
| Enclosure Flame Retardant Grade | UL94V-0 |
| Enclosure Protection Level | IP20 |
| Combination Method | 3+1 |
| Installation Method | DIN:35mm |
| Operating Temperature | -40℃～+70℃ |
| Operating Humidity | 5%RH～95%RH |
| Altitude | ＜2000 m |
■ Product Overview
The BY7-40/3+1-385 AC surge protector is designed based on IEC lightning protection requirements and combined with the application environment of the AC power system. It features high-energy MOV chips with nanosecond response speeds. It provides a reliable voltage protection level, strong surge current discharge capability, and safe overload characteristics, offering protection against lightning, surges, and power grid purification to ensure functional safety and reliability.
■ Application Scope
Mainly used for lightning protection of various electrical equipment such as distribution boxes in AC power systems.
■ Performance Features
· Voltage-limiting design that meets Type 2 test requirements;
· Various combination methods to achieve differential mode and common mode protection functions;
· High-energy MOVs with low residual voltage and high voltage protection level;
· The disconnector has an arc-extinguishing device, with strong overload capacity;
· High continuous working voltage and high current capacity;
· Fast response speed without follow current;
· DIN rail mounting;
· Enhanced nylon enclosure with IP20 protection level;
· Compact size, convenient for installation and use.
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