XRNT High Voltage Current-Limiting Fuse

The XRNT High Voltage Current-Limiting Fuse is engineered for medium- and high-voltage protection systems, offering fast interruption, strong arc-quenching performance, and reliable operation under demanding electrical conditions. Its high-purity materials, nickel-plated copper components, and precision ceramic tube design make it suitable for transformers, switchgear, capacitor banks, and RMU cabinets across utility and industrial networks.

Product Features & Advantages

1. Performance Advantages

High Breaking Capacity

Interrupting rating up to 50 kA, suitable for high-fault-current environments.
Prevents equipment burnout and ensures stable operation of MV power systems.

Environmental Durability

Cold-resistant and heat-resistant ceramic fuse tube ensures long-term performance in harsh climates.
Ideal for desert, coastal, tropical, and cold-region installations.

Excellent Arc-Quenching

Filled with high-purity, rounded quartz sand.
Ensures rapid arc extinction and minimizes thermal damage.

2. Material & Craftsmanship Advantages

Nickel-Plated Pure Copper End Caps

Strong corrosion resistance and high electrical conductivity.
Smooth surface, high mechanical strength, and long lifespan.

Precision High-Density Ceramic Tube

In-house molded for consistent dimensions and enhanced dielectric strength.
Provides excellent thermal stability.

Reliable Copper Striker

Made from high-quality copper for an accurate mechanical response.
Complies with national safety requirements.

High-Efficiency Silver Fuse Element

Silver wire melt-element ensures high current-limiting efficiency.
Professionally tested for stable, repeatable performance.

Uniform Nickel-Plating Process

Copper caps undergo controlled nickel electroplating.
Clear laser-engraved marking for easy identification.

3. Appearance & Build Quality

Original Factory Build

100% new product with a clean label and uniform symmetry.
Zero deformation, zero surface defects.

High Sealing Integrity

The cylindrical cap structure provides strong sealing against moisture and dust.
Ensures operational reliability in outdoor switchgear.

Technical Specifications

Parameter	Value
Voltage Rating	12 kV / 24 kV / 36 kV
Current Rating	6A / 10A / 16A / 20A / 25A / 31.5A / 40A
Breaking Capacity	Up to 50 kA
Material (Fuse Tube)	High-density ceramic
End Cap Material	Nickel-plated pure copper
Arc-Quenching Medium	High-purity quartz sand
Fuse Element	Silver melt-wire
Striker Material	Copper
Installation	Indoor/Outdoor switchgear, RMU, transformer protection

Available Models & Configurations

XRNT-12 Series – For 12 kV transformer and switchgear protection
XRNT-24 Series – For 24 kV distribution networks
XRNT-36 Series – For 33–36 kV RMU and outdoor pole-mounted systems
Current ratings: 6A–40A available
Custom specifications available upon request

Application Scenarios

The XRNT fuse is widely used in:

Oil-immersed and dry-type distribution transformers
Ring Main Units (RMU)
High-voltage switchgear
Capacitor bank protection
Outdoor pole-mounted equipment
Industrial distribution systems

Real-World Case Reference

• Kenya Power & Lighting Co. (KPLC, 2022 Report) uses 11–33 kV current-limiting fuses in RMU feeder units for short-circuit protection.
• Eskom South Africa (Technical Guideline 34-323) lists current-limiting fuses as standard protection for 12 kV and 24 kV distribution transformers.
• Saudi Electricity Company SEC (SEC Distribution Code) includes XRNT-type fuses as approved components for MV switchgear fault protection.

Product Advantages Summary

50 kA high breaking capacity
Premium ceramic tube with high sealing performance
Superior arc-quenching from high-purity quartz sand
Nickel-plated copper end caps for long service life
High-precision silver fuse element ensures reliable protection
Suitable for diverse MV systems up to 36 kV

FAQ — XRNT High Voltage Current-Limiting Fuse

• What is the main purpose of an XRNT fuse?
It provides fast fault interruption for transformers, RMU, and MV switchgear, limiting damage caused by short-circuit currents.

• Can the XRNT fuse operate in outdoor environments?
Yes. The ceramic tube and sealed cap design offer strong environmental resistance suitable for outdoor cabinets.

• What is the breaking capacity of the XRNT fuse?
Up to 50 kA, supporting high-fault-current networks.

• How is the quality of the internal materials ensured?
Each batch undergoes silver-element testing, quartz-sand purity tests, and nickel-plating uniformity inspection.

• Does the fuse include a striker for tripping mechanisms?
Yes. The copper striker provides a reliable mechanical indication for switch disconnector tripping.