Choosing the right steel-cored aluminum stranded wire requires considering three main dimensions: core strength, application scenario, and electrical performance. The core consideration is matching the mechanical load, environmental conditions, and power transmission requirements of the line. Below are specific selection logic and practical suggestions:
Selection Based on Core Strength Grades (Determines Mechanical Load-Bearing Capacity)
Core strength directly affects the tensile strength of the conductor and is crucial for selection in long-span and heavy icing areas
JL/G1A (Ordinary Strength)
Suitable for: Plains, hilly areas, and other conventional areas; medium and low voltage lines (below 110kV)
Representative Models: LGJ-240/30, LGJ-150/25
Features: Low cost, easy construction and maintenance, meets general mechanical strength requirements.
JL/G2A (Medium Strength)
Suitable for: Mountainous areas, windy areas, and lines with moderate icing (20–30mm)
Representative Model: JL/G2A-400/50
Advantages: Breaking tensile strength increased by more than 20%, reducing the risk of line breakage.
JL/G3A (Extra High Strength)
Suitable for: High mountain valleys, long spans, and heavy icing areas (icing >30mm)
Representative Model: JL/G3A-630/45
Value: Ultimate tensile strength can reach over 171kN, ensuring safe operation in extreme environments.