The correct selection of JKLGYJ cable requires consideration of several factors, including the cable's intended use, installation conditions, safety requirements, and specific cable specifications. Below is a detailed purchasing guide:
1. Application and Applicable Applications:
JKLGYJ cable is primarily used for overhead power lines and is suitable for applications with an AC rated voltage of 35kV and below. It is particularly well-suited for use in locations with high safety requirements, such as towns, high-rise buildings, and forested areas.
2. Cable Specifications and Models:
JKLGYJ cable models typically include steel-core aluminum stranded conductors and cross-linked polyethylene insulation, such as the JKLGYJ-10KV-70/10 high-voltage cable. Cable specifications range from 2.5mm² to 300mm², meeting various power transmission requirements.
3. Technical Performance and Usage Characteristics:
JKLGYJ cable exhibits excellent mechanical and electrical properties, including excellent tracking resistance, surface discharge resistance, and atmospheric resistance. The conductor's permissible operating temperature is 90°C, with a maximum short-circuit temperature of 250°C. The laying temperature must be no lower than -20°C, and the bending radius must be no less than 12 times the cable diameter.
4. Purchasing Considerations:
When purchasing, choose appropriate cable based on the power load. Avoid underpriced cables, as these may have performance deficiencies or safety hazards. Furthermore, the product certificate should include the registered trademark, product name, applicable standard, model, voltage, specifications, length, and manufacturer information.
5. Laying and Installation Considerations:
During the laying process, ensure that the cable's laying temperature is no lower than -20°C, and the permissible bending radius must be no less than 12 times the cable diameter. Mechanical damage must be avoided during laying, and careful handling and storage, especially in low-temperature conditions, must be ensured.
6. Safety Considerations:
JKLGYJ cables must have safety factors considered during design and use, especially in high-voltage and ultra-high-voltage lines. Conductor stress sag and tower electrical and structural calculations require rigorous calculations.
What is the performance comparison of JKLGYJ cables at different voltage levels?
1. 10kV Voltage Level:
1-1. JKLGYJ cables are suitable for 10kV voltage levels. Specifications include 10/2, 16/3, 25/4, 35/6, 50/8, 70/10, 95/15, 95/20, 120/20, 150/20, 185/25, 185/30, 240/30, and 300/25.
1-2. At 10kV voltage levels, JKLGYJ cables exhibit excellent electrical insulation and mechanical properties, making them suitable for high-security applications such as urban areas, high-rise buildings, and forested areas.
1-3. Technical parameters show that at a 10kV voltage level, the JKLGYJ cable's conductor DC resistance and insulation resistance meet standard requirements. Its maximum operating temperature is 90°C, and it can withstand a 1-minute AC withstand voltage test voltage of 1500kV.
2. 1kV Voltage Level:
2-1. JKLGYJ cable is also suitable for the 1kV voltage level, with the same specifications as the 10kV voltage level.
2-2. At the 1kV voltage level, JKLGYJ cable also exhibits excellent electrical insulation and mechanical properties, making it suitable for low-voltage power supply lines.
2-3. Specific technical parameters, such as conductor DC resistance and insulation resistance, meet the requirements for low-voltage cables. Its maximum operating temperature is 90°C, and it can withstand the corresponding withstand voltage test.
