Customer Challenge:
A large utility company in Southeast Asia required a robust, reliable solution to protect its high-voltage overhead lines in rural areas prone to heavy monsoon rains and storms. The system needed fuses that could quickly disconnect during fault conditions without causing damage to the power network.

Uni-Cable Solution:
Uni-Cable supplied high-voltage expulsion type cutout fuses with the following features:

Voltage Rating: 33kV, suitable for the network's requirements.
Current Rating: 100A, designed to handle the typical fault currents in the area.
Materials: Copper fuse links for reliable performance and quick melting during fault conditions.
Arc Extinguishing Mechanism: Built-in arcing horns to safely extinguish the arc formed when the fuse link melts.
Outcome: The installation of Uni-Cable’s cutout fuses improved the reliability of the power distribution network, reducing downtime during storm conditions. The fuses effectively isolated faulty sections, protecting the electrical equipment and minimizing system damage.

Quality Inspection
Uni-Cable adheres to stringent quality control measures to ensure the reliability, safety, and performance of its cutout fuses:

Material Quality Control:
Conductor and Fuse Link Testing: The materials used for the fuse link are tested for electrical conductivity, tensile strength, and resistance to corrosion.
Insulator and Housing: Insulation materials undergo tests for high-voltage resistance, mechanical strength, and thermal stability.

Mechanical Testing:
Tensile Strength: The mechanical strength of the fuse holder, arc extinguishing components, and housing are tested to ensure they can withstand harsh environmental conditions.
Opening and Closing Mechanism: The fuse is tested for smooth operation of the opening and closing mechanism, ensuring reliability.

Electrical Testing:
Current and Voltage Rating Verification: Each fuse is tested under simulated overload and short-circuit conditions to verify its current rating and the fuse’s ability to interrupt fault currents within the specified time.
Arc Extinguishing Tests: The fuse is tested for its arc quenching capabilities, ensuring safe operation during fault conditions.

Environmental Testing:
Heat Resistance: The fuse is subjected to high-temperature tests to ensure it operates reliably in hot climates.
UV and Weather Resistance: The fuse’s ability to withstand exposure to UV radiation, rain, and saltwater is tested, especially for use in coastal or exposed locations.

Final Inspection and Packaging:
The final product undergoes a thorough visual and dimensional inspection before being packaged for export. Packaging is designed to protect the fuses from mechanical damage during transit.

Production Standards
Uni-Cable’s cutout fuses are manufactured according to international standards to ensure quality, safety, and performance:
IEC 60282-1: International standard for high-voltage fuses, providing guidelines for the design, testing, and performance of fuses.
BS 6651: British standard for high-voltage fuse links used in overhead line distribution systems.
ANSI C37.42: Standard for cutout fuses used in power distribution systems.
ISO 9001 Certified: Ensures that all production processes meet international quality management standards, ensuring the consistent production of high-quality fuses.

Uni-Cable's cutout fuses provide reliable protection for high-voltage and low-voltage electrical distribution systems. With a focus on quality, performance, and safety, these fuses are ideal for overhead lines, substations, and industrial applications. Manufactured according to international standards and tested for real-world performance, Uni-Cable’s cutout fuses ensure the continued safe and efficient operation of electrical networks worldwide.