8.7kV High-Voltage Current-Limiting Fuse (40A–100A)

The 8.7kV series is a compact and high-reliability current-limiting fuse designed for AC 50/60Hz medium-voltage power distribution systems with a rated voltage of 8.7kV. It provides accurate and stable overcurrent and short-circuit protection in a rated current range from 40A to 100A, making it widely used in small and medium-sized distribution networks, compact substations, switchgear and power equipment protection.With excellent current-limiting performance, stable time-current characteristics and high breaking capacity, this fuse effectively protects distribution transformers, small motors, capacitor units, ring main units and other key 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 utility, industrial and commercial power systems.

Key Features

• Rated voltage: 8.7kV, ideal for secondary distribution and compact power systems
• Rated current range: 40A, 50A, 63A, 80A, 100A to meet small and medium load requirements
• Excellent current-limiting performance to minimize impact on protected equipment
• High breaking capacity for safe and reliable fault interruption
• Stable and consistent protection characteristics
• Low power loss and low temperature rise
• Compact structure for easy installation in limited space
• Rugged design with good shock and vibration resistance
• Optional striker for fault indication and interlock control
• Compliant with IEC 60282 and GB/T standards

Main Applications

This 8.7kV (40A–100A) fuse is widely used in:

• Small and medium distribution transformers
• Compact distribution substations and box-type substations
• Medium-voltage switchgear and ring main units (RMUs)
• Power factor correction capacitor banks
• Industrial and commercial power distribution systems
• Infrastructure, construction and utility power networks

Why Choose Our 8.7kV Fuses?

Our 8.7kV series fuses offer cost-effective, stable and maintenance-free protection for low-to-medium current distribution systems. The 40A–100A range covers most common small and medium load scenarios, with reliable performance and standardized dimensions for easy replacement. Strict quality control and full standard compliance make them a trusted choice for global power utilities, contractors and equipment manufacturers.