I. Overview of Melamine Tubes
Melamine tubes are typically made from continuous glass woven base material impregnated with melamine resin binders. They feature high strength, good dimensional stability, arc resistance, corrosion resistance, and excellent electrical insulation performance. Common types include G5 and G9, among which G-9 material is better suited for harsh environments compared to G5, and in most cases, G9 can replace G5.

II. Applications in Fuses
Overcurrent Protection
Fuses are important devices in circuits used for overcurrent protection. When a circuit experiences a short circuit or overload, the thermal effect of the overcurrent causes the fuse element to melt and vaporize, creating a break. An electric arc is generated at this break. Melamine tubes, with their excellent arc resistance and arc extinguishing capability, can help the fuse rapidly extinguish the arc and interrupt the faulty circuit, thereby protecting the circuit and electrical equipment.
For example, in the KLPC series POWR-PRO™ fuses, glass-reinforced melamine tube bodies are used. These tubes can provide at least ten seconds of time delay at 500% rated current and have strong current limiting capability. The average peak let-through current is 10% lower than other "time-delay" Class L fuses.
Various Fuse Types
Melamine tubes are widely used in high-current fuse tubes, such as those for electric vehicles, photovoltaic systems, and the telecommunications industry. In the fields of electric vehicles and charging stations, NH low-voltage fuses, American standard fuses, BS88 fuses, etc., are used. Melamine tubes provide reliable insulation and arc extinguishing performance for these applications. In the photovoltaic field, they can meet the operating requirements of solar DC fuses, ensuring the safe and stable operation of photovoltaic power generation systems.
III. As Mechanical Support for Electrical Equipment
Melamine tubes can be used as mechanical support in electrical equipment, switch cabinets, and slot wedges, etc., where Class B insulation is required. Their high strength and good insulation performance ensure the electrical safety of the equipment while supporting electrical components. For example, in the branch circuits of some large motors, melamine tubes can serve as support structures to ensure stability and safety during motor operation.
IV. Applications in Insulation Structural Components of High-Voltage Electrical Equipment
For insulation structural components of mechanical and high-voltage electrical equipment that require arc resistance, tracking resistance, and flame retardancy, melamine glass cloth laminated tube is an ideal choice. It has flame retardant properties, similar to NEMA standard G-5, and can effectively prevent safety accidents caused by issues such as arcing and leakage during the operation of electrical equipment. For example, in equipment such as high-voltage switch cabinets and transformers, melamine tubes can serve as insulation components, improving the insulation performance and reliability of the equipment.
V. Other Applications
In the fields of power system protection and industrial control, melamine tubes also play an important role. In the fuse overload protection systems of power equipment in industries such as electric locomotives, large-scale steel production, and construction machinery, melamine-epoxy glass fiber tubes can meet the stringent requirements of the system regarding mechanical strength, electrical performance, etc., ensuring the normal operation of the power equipment.
In summary, melamine tubes, with their unique performance advantages, have wide and important applications in the electrical field, providing strong assurance for the safe and stable operation of electrical equipment.
