0.4kV Overhead Line Metal Structures for Uninsulated Wires

Main Components

Tops:

Function: Tops are mounted on the top of poles and are used for securing and separating wires. They help keep wires at a certain distance from the pole, protecting them from short circuits, swaying, and mechanical damage.
Materials: Typically made of galvanized steel or other durable metals, ensuring longevity, corrosion resistance, and protection against weather conditions.
Structural Features: Tops are designed to hold wires steadily under any weather conditions. They have special clamps or loops that allow easy attachment of wires without damaging their insulation.
Crossarms:

Function: Crossarms are mounted horizontally on poles and are used as transverse supports for wires. They help keep wires at a certain distance from each other, ensuring stability.
Materials: Crossarms are made from high-quality galvanized steel, which provides resistance to mechanical stress and corrosion. Galvanizing also prolongs the service life of structures, even in harsh weather conditions.
Structural Features: Crossarms are designed to allow easy fastening of wires while ensuring their stability. They often use insulator holders or loops, allowing secure attachment of wires and reducing the risk of short circuits.
Technical Specifications

Corrosion Resistance: As these structures are constantly exposed to outdoor conditions (rain, wind, sun), they are often made from galvanized metal, protecting them from corrosion. Galvanizing increases durability and reduces maintenance needs.
Sturdy Construction: Metal structures like tops and crossarms must be strong enough to withstand the weight of wires and external mechanical impact, such as wind or ice loads.
Grounding Capability: Some structures have grounding functions or special grounding points, providing additional safety and helping to protect against electric leakage.
Application Areas

Electric Supply to Residential Areas: Low-voltage overhead lines are often used for power supply to residential neighborhoods, small towns, or rural areas without underground power infrastructure.
Industrial and Commercial Zones: In industrial areas where power demand is moderate but reliable supply is required.
Temporary Power Lines: These structures are also used for installing temporary power lines, for example, at construction sites or seasonal event locations.
Main Advantages

Cost-Effective Solution: Overhead line structures are more economically efficient than underground lines, especially in rural areas or regions with lower electricity demand.
Easy Maintenance and Servicing: Since the lines are on poles, they are easy to access for repairs or component replacement, ensuring quick and simple maintenance.
Durability: Galvanized steel structures ensure durability even in challenging weather conditions, reducing maintenance costs and risk of failure.
Protection Against Short Circuits: Structures like crossarms and tops help maintain wires at a certain distance from each other and from poles, reducing the risk of short circuits and electrical leakage.
Ensuring Safety and Reliability

Compliance with Safety Standards: Overhead line structures must comply with international and local electrical supply safety standards, ensuring safety for both technical personnel and residents.
Resistance to Environmental Impact: Structures are designed to withstand various weather conditions – from wind to temperature fluctuations, ensuring uninterrupted line functionality.
Modular Structure: Tops and crossarms are designed to be adaptable to different types of wires and power line sizes, providing flexibility for installing new lines or upgrading existing infrastructure.
Metal structures for uninsulated wires in 0.4 kV overhead lines, such as tops and crossarms, are essential components ensuring stability, safety, and durability. These structures are widely used for electricity transmission in residential and industrial areas where an economical and easy-to-maintain power supply system is required.