What is the Fuse Cutout Tube?
The fuse cutout tube is an essential component in the electrical distribution system, which is used to accommodate and safeguard the fuse element for shielding power lines and furnish from overcurrent conditions. This tube generally consists of high-strength composite materials (e.g., fiberglass-reinforced epoxy resin) for good mechanical durability, good thermal resistance, and electrical insulation properties. Its cylindrical design secures the fuse link inside and provides adequate protection against environmental factors such as UV radiation, moisture, and pollutants. The tube plays a dual role in operation: It also serves as a physical enclosure to protect the fuse from external damage and prevent circuit isolation when the fuse operates. They are engineered for the dynamic mechanical stress induced by fuse operation, such as thermal energy and arcing during fault clearing. They are also environmentally aged and they will serve long periods of outdoor exposure.
Parameters
| SN | Parameter | Unit | Standard |
| 1 | density | g/cm3 | 1. 8—1.9 |
| 2 | absorption | % | 180—300 |
| 3 | shear strength | Pa(kg5/cm2) | 150—200 |
| 4 | bending strength | 100—200 | |
| 5 | compressive strength | <0.5 | |
| 6 | vertical interlayer withstand voltage | ≥1.0×106 | |
| Thickness (withstand normal voltage for 5 min)
2.0 2.5 3.0 4.0 5.0 6.0 7.0 8.0 |
KV
14 16 18 20 24 28 30 34 |
||
| 7 | （500V） surface resistivity | Ω | >1.0×1012 |
| 8 | （500V） volume resistivity | Ω×cm3 | >1.0×1012 |
| 9 | dielectric loss angular tangent value at 50Hz frequency | % | <0.5 |
| 10 | temperature resistance | ℃ | 110-220 |
| Color | Gray/natural color/any color customers need |
| Length | Maximum: 50’’/1270(mm) |
| Tube diameter | Minimum: 0.2’’/5(mm) |
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Features
1. High Arc Resistance:
Fuse cutout tubes are made to take the harsh heat and the voltage coming out of the arcing during the fuse operation, and always maintain safe and functional fault isolation.
2. Exceptional Weatherability:
These tubes are made from materials that are UV-resistant, temperature-resistant, and environmental contaminant-resistant and perform as expected through harsh outdoor conditions.
3. Excellent Dielectric Properties:
They use insulating materials that would ensure reliable electrical isolation and resist the leakage of current even at the stage of high voltages.
4. Impact and Shock Resistance:
These are engineered to withstand mechanical impacts and vibrations and retain structural integrity while sudden fuse operations or environmental disturbances occur.
5. Thermal Stability:
Fuse cutout tubes can stand up to high thermal energy during fault clearing without degrading and, thus, provide long-term reliability.
6. Non-Flammable Construction:
The use of nonflammable materials for composite materials increases safety by suppressing the propagation of fire under fault conditions.
7. Customizable Dimensions and Coatings:
Its tubes can be sized and surface treated to suit particular electrical and mechanical needs, providing flexibility for a variety of system requirements.
How does it contribute to the reliability of power distribution systems?
As a critical safeguard against overcurrent conditions, it enhances the reliability of the power distribution system. The fuse link is securely housed within it under operational stresses by utilizing high-performance materials and robust design to allow both electrical insulation and mechanical stability. The tube allows the fuse to work effectively when there is a fault condition, isolates the faulted section, and protects downstream equipment from damage.
Even more, the tube withstands adverse conditions like UV exposure and moisture as well as pollutants and performs the same way in harsh outdoor climates. FUSE CUTOUT TUBE provides a durable and reliable enclosure for the fuse, reducing system failure risk, requiring less maintenance, and increasing system resilience. It is critical to the reliability of an uninterrupted power supply and to minimize downtime in distribution networks.
