| Model | BY7-40J |
|---|---|
| Nominal System Operating Voltage Uo V | 230/400 |
| Maximum Continuous Operating Voltage Uc V | 275/320/255 N-PE |
| Nominal Discharge Current In kA | 20 |
| Maximum Discharge Current Imax kA | 40 |
| Voltage Protection Level Up kV | 1.5 |
| Rated Short-Circuit Current Isc A | 500 |
| Local Failure Indication | Green window: Normal; Red window: Failure |
| Fault Alarm Contacts | 1NO+1NC |
| Response Time | ≤ 25 ns L-N, ≤ 100 ns N-PE |
| Insulation Resistance | > 50 MΩ |
| Wiring Capacity | 2.5～6 mm² |
| Enclosure Flame Retardant Grade | UL94V-0 |
| Enclosure Protection Level | IP20 |
| Combination Mode | 2+0, 1+1, 2+1 |
| Mounting Method | DIN: 35mm |
| Operating Temperature | -40℃～+70℃ |
| Operating Humidity | 5%RH～95%RH |
| Altitude | < 2000 m |
Product Overview
The BY7-40J AC surge protector is designed in accordance with IEC lightning protection requirements and tailored for the application environment of AC power systems. It utilizes high-energy MOV (Metal Oxide Varistor) chips, offering nanosecond-level response speed. This device provides reliable voltage protection levels, strong surge current discharge capacity, and safe overload characteristics. It is designed to protect against lightning, surges, and power grid disturbances, ensuring functional safety and reliability.
Application Scope
It is primarily used for lightning protection of various electrical equipment such as distribution boxes in AC power systems.
Performance Features
· Voltage-limiting and combined-type designs, meeting Type 2 test requirements;
· Multiple combination modes to achieve differential mode and common mode protection functions;
· High-energy MOV with low residual voltage and high voltage protection level;
· The disconnector includes an arc-extinguishing device, offering strong overload capacity;
· High continuous operating voltage and large current capacity;
· Fast response time with no follow-on current;
· Rail-type installation;
· Reinforced nylon enclosure, IP20 protection level;
· Compact size for convenient installation and use.
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