Product Overview

The BLFW 40.5kV series is a high-performance, indoor-type current-limiting high-voltage fuse designed for AC 50/60Hz power systems with a rated voltage of 40.5kV (35kV class). Engineered for critical protection applications, this fuse series provides fast, dependable overload and short-circuit protection for a wide range of high-voltage electrical equipment, including power transformers, electric motors, capacitor banks, distribution switchgear, and power transmission lines.Available in a comprehensive current range from 100A to 1200A, the BLFW series offers a versatile solution for various industrial, utility, and renewable energy projects, ensuring stable operation and safeguarding expensive assets from damaging fault currents.

Key Features & Advantages

• Broad Current Rating (100A-1200A): Full ampere spectrum to match diverse load requirements, ideal for small distribution transformers up to large industrial drives.
• 40.5kV High Voltage Class: Specifically designed for 35kV power grids, ensuring perfect voltage matching and superior insulation performance.
• Excellent Current-Limiting Capability: Fast-acting design limits peak let-through current, minimizing thermal and dynamic stress on protected equipment during faults.
• High Breaking Capacity: Robust construction safely interrupts high short-circuit currents up to 31.5kA~50kA, ensuring complete fault isolation.
• Stable & Consistent Time-Current Characteristic (TCC): Precision-engineered fusible elements guarantee accurate, reliable, and repeatable protection performance.
• Low Power Loss & Temperature Rise: High-efficiency design reduces energy consumption and operational heat, enhancing long-term stability.
• Built-In Spring Striker (Optional): Integrated actuator provides reliable signal for remote indication or interlocking with load switches.
• Compact & Rugged Design: High-quality ceramic barrel and metal end caps ensure mechanical strength, resistance to shock and vibration.
• Easy Installation & Replacement: Standardized dimensions for direct retrofit in switchgear, ring main units (RMUs), and panel boards.
• Compliant with International Standards: Manufactured in accordance with GB/T 15166.2 and IEC 60282 for global reliability and acceptance.