Transfomer's Components

High Voltage Current-Limiting Fuse – Fast and Reliable Overcurrent Protection

Our High Voltage Current-Limiting Fuses are engineered for rapid interruption of high fault currents, providing critical protection for medium- and high-voltage electrical equipment, such as power transformers, voltage regulators, capacitors, and switchgear. These fuses are designed to interrupt fault currents before they reach damaging levels, limiting energy let-through and minimising thermal and mechanical stress on protected equipment.

Manufactured to IEC and ANSI/IEEE standards, our current-limiting fuses are constructed with high-purity silver or copper fusible elements, enclosed in arc-quenching silica sand and a durable ceramic or fibre-reinforced casing. This design enables precise and predictable performance, even under extreme short-circuit conditions.

Key Features:

• Voltage Class: 3.6kV to 40.5kV
• Current Ratings: Up to 630A (depending on configuration)
• Breaking Capacity: Up to 63kA symmetrical
• Design: Current-limiting, fast-acting with minimal let-through energy
• Construction: High-strength ceramic or epoxy housing, arc-quenching filler, and precision fusible elements
• Standards Compliance: IEC 60282-1, ANSI C37.46, C37.47
• Mounting Options: Indoor and outdoor, clip-in, bolted, or DIN mounting styles

Applications:

• Pad-mounted and pole-mounted distribution transformers
• High-voltage switchgear and protection cabinets
• Capacitor banks and voltage regulators
• Wind farms, solar substations, and industrial power systems

Benefits:

• Limits peak fault currents and prevents equipment damage
• Increases system safety and service continuity
• High interrupting capacity ensures long-term reliability
• Compact size with flexible mounting options

Choose our high-voltage current-limiting fuses for superior protection, fast response, and compliance with global utility standards.