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What Tests Do Wires and Cables Undergo? - Shanghai Shenghua Cable Group Co., Ltd
What Quality Tests Does Shenghua Cable Conduct on Its Wires and Cables? Shanghai Shenghua Cable Group Co., LtdAs essential tools for power transmission, cables play a critical role in industrial production, construction engineering, transportation, scientific research, military projects, modern agriculture, space engineering, and deep-sea exploration. Therefore, the quality of wires and cables is paramount. Significant market demand has led to the emergence of many substandard cable manufacturers. To enhance product quality, ensure the safe operation of power systems, and support the steady development of the national economy, comprehensive testing items and scientific testing methods are indispensable.At Shenghua Cable, products are shipped to customers only after passing rigorous quality inspections. The main testing categories include: Appearance, Dimensions, and Structure Inspection; Electrical Performance Testing; and Mechanical Performance Testing.1. Appearance, Dimensions, and Structure Inspection of Wires and CablesThis can be subdivided into appearance inspection, dimensional inspection, and structural inspection.
Appearance Inspection: Ensures the surface is smooth and round, free from defects and impurities such as burrs, cracks, spots, or oil stains that could affect performance. Also verifies that corrosion and oxidation levels meet requirements.
Dimensional Inspection: Includes checks for outer diameter, thickness, eccentricity, sector height, pitch, cross-section, and density.
Structural Inspection: Involves examining the cross-section, protective layer, core structure, and insulated cores.
2. Electrical Performance Testing of Wires and CablesElectrical performance directly affects cable functionality. Key tests include:
DC Resistance Test: Measures electrical resistance based on the law of resistance.
Voltage Test: Ensures safe operation by applying a specific voltage under set conditions to check if the insulation withstands the stress without breakdown.
Insulation Resistance Test: A crucial indicator of insulation properties, reflecting the product's ability to resist electrical or thermal breakdown and withstand operational wear.
3. Mechanical Performance Testing of Wires and CablesBased on requirements for production, transportation, and use, cables must possess certain mechanical properties. Key tests include:
Mechanical Strength Test: Evaluates tensile strength and elongation to assess resistance to external forces.
Bending Performance Test: Determines how well the cable withstands bending stresses during production and use, measured by the number of bends until failure.
Torsion Performance Test: Assesses plastic deformation under twisting and checks for material uniformity or defects by counting twists before fracture.
Winding Test: Involves coiling the specimen around a mandrel of a specified diameter for a set number of turns and observing surface changes.
Only through comprehensive testing items and scientific methods can product quality be ensured. Shenghua Cable Group delivers its wire and cable products to customers only after they successfully pass all the above tests.Shenghua Cable Group founded in 1954 and ranked among the top 500 machinery manufacturers in China, is a highly capable wire and cable manufacturer. Its product range encompasses hundreds of thousands of types, including but not limited to: KVVP shielded control cables, ZR-YJV22 armored power cables, ZR-BVR/RVS/RVV PVC insulated sheathed household wiring cables, YJLHV aluminum alloy cables, BTTZ mining cables, aerial cables, and fire-resistant specialty cables. All products are manufactured in compliance with national standards, ensuring guaranteed quality. For reliable cables, choose Shenghua Cable.
