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    BY7-40J Surge protection deviceBY7-40J Surge protection device
Product Details
Overview and Feature
Electrical schematic diagram
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Product Details

BY7-40J Surge protection device

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
Overview and Feature

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.

Electrical schematic diagram
Wiring diagram
Product Inquiry
If you would like a quotation or further information about this product, please fill in the form below and we will reply to you soon. You can also contact with Mr.Peter through Whatsapp # 0086-15958776000 or Wechat # GREEGOO directly, thank you.

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