BJW 40kV High-Voltage Current-Limiting Fuse (300A–3150A)

The BJW 40kV series is a heavy-duty current-limiting fuse designed for AC 50/60Hz high-voltage power systems with a rated voltage of 40kV. It provides stable, efficient overcurrent and short-circuit protection in a wide rated current range from 300A up to 3150A, making it ideal for large-capacity power equipment and industrial power distribution systems.With excellent current-limiting performance, high breaking capacity and stable time-current characteristics, this fuse effectively protects large transformers, high-power motors, capacitor banks, rectifiers and other critical equipment from damage caused by fault currents. It features low power loss, low temperature rise and strong environmental adaptability, ensuring long-term safe operation in industrial and power grid applications.

Key Features

• Rated voltage: 40kV, suitable for 40kV high-voltage power networks
• Ultra-wide current range: 300A to 3150A for heavy-load and large-capacity equipment
• Excellent current-limiting performance to reduce thermal and dynamic stress on equipment
• High breaking capacity for safe and reliable fault interruption
• Stable and consistent protection characteristics
• Low power loss and low temperature rise for high efficiency
• Rugged construction with high mechanical strength and shock resistance
• Optional striker for fault indication and interlock control
• Standard dimensions for easy installation and replacement
• Compliant with IEC 60282 and GB/T standards

Main Applications

BJW 40kV (300A–3150A) high-voltage fuses are widely used in:

• Large power transformers in 40kV substations
• High-power industrial motors and driving systems
• Shunt capacitor banks and power compensation equipment
• Industrial rectifiers, electric furnaces and heavy electrical loads
• Wind power, photovoltaic and new energy power generation systems
• High-voltage switchgear, compact substations and power distribution equipment
• Metallurgy, petrochemical, manufacturing and other heavy industries

Why Choose BJW 40kV Fuses?

The BJW 40kV series is specially designed for high-current, high-voltage applications. Its 300A–3150A wide current range meets the protection requirements of large-capacity power equipment, with reliable performance and long service life. Strict quality control and standard compliance make it a preferred choice for power grids, industrial projects and large-scale power equipment worldwide.