18kV High-Voltage Current-Limiting Fuse (55A)

The 18kV 55A fuse is a high-reliability current-limiting fuse designed for AC 50/60Hz medium-voltage power systems with a rated voltage of 18kV. With a rated current of 55A, it provides precise, stable overcurrent and short-circuit protection for small and medium-sized distribution equipment in urban grids, industrial facilities, compact substations and power supply systems.Featuring excellent current-limiting performance, high breaking capacity and stable time-current characteristics, this fuse effectively protects distribution transformers, small motors, capacitor units, switchgear and ring main units from damage caused by fault currents. It has low power loss, low temperature rise and strong environmental adaptability, ensuring long-term safe operation in various utility and industrial scenarios.

Key Features

• Rated voltage: 18kV, suitable for 18kV medium-voltage distribution networks
• Rated current: 55A, ideal for small-load equipment protection
• Excellent current-limiting performance to minimize impact on connected equipment
• High breaking capacity for safe and reliable fault interruption
• Stable time-current characteristics for accurate protection coordination
• Low power loss and low temperature rise for high operational efficiency
• Compact and rugged structure, shock and vibration resistant
• Optional striker for fault indication and interlock control
• Standard dimensions for easy installation and replacement
• Compliant with IEC 60282 and GB/T international standards

Main Applications

This 18kV 55A fuse is widely used in:

• 18kV distribution transformers and compact substations
• Medium-voltage switchgear and ring main units (RMUs)
• Small-power motors and drive systems
• Shunt capacitor banks and power compensation equipment
• Urban power distribution networks and industrial power systems
• Infrastructure and commercial power supply facilities

Why Choose Our 18kV 55A Fuses?

Our 18kV 55A current-limiting fuse offers stable, cost-effective protection for 18kV medium-voltage systems. Its precise rating ensures perfect matching for common small-load applications, while strict quality control ensures consistent performance and long service life. Fully compliant with international standards, it is a trusted choice for power utilities, contractors and equipment manufacturers worldwide.