Choosing the appropriate cables is crucial for ensuring the safe, reliable, and efficient operation of electrical systems. This guide will systematically introduce the key factors in cable selection, helping you make informed decisions based on specific application needs.

1、 Main types and characteristics of cables

1. Power cables

• ‌purposeUsed for transmitting and distributing electrical energy

• ‌classification‌：

  • According to voltage levels: low voltage (35kV and below), high voltage (110kV and above), ultra-high voltage (275-800kV), and extra high voltage (1000kV and above)

  • According to insulation materials: oil immersed paper insulation (safe and reliable but limited by drop height during installation), plastic insulation (polyvinyl chloride/polyethylene/cross-linked polyethylene), rubber insulation

• ‌characteristicSimple structure, easy manufacturing and processing, light weight, easy installation and laying2

2. Control cables

• ‌purposeUsed for controlling and monitoring equipment circuits

• ‌common modelsKVV series cables

• ‌characteristicIn situations where frequent movement or mechanical external forces are required, models with higher mechanical strength should be selected, such as increasing the thickness of the sheath or using KVV cables with steel wire armor

3. Communication cables

• ‌purposeTransmission of electrical or optical signals

• ‌Common typesTelephone cable (HYA), fiber optic cable (GYTA)

• ‌characteristicShielded cables should be used in environments with strong electromagnetic interference such as communication base stations and data centers

4. Special cables

• ‌purposeFor special environmental requirements

• ‌Common types: Flame retardant cable (ZR), fire-resistant cable (NH), torsion resistant flexible cable

• ‌characteristicSuitable for special scenarios such as wind power generation and underground excavation equipment

2、 Application scenarios and cable selection

1. High temperature environment

• ‌Applicable cablesSilicone rubber insulated cable, mica tape wrapped insulated cable

• ‌characteristicSilicone rubber can work for a long time at temperatures above 200 ℃; Mica tape wrapped insulated cables can maintain normal operation for a certain period of time in a fire

• ‌Application scenariosSteel smelting, glass manufacturing, boiler rooms, etc

2. Wet environment

• ‌Applicable cablesCross linked polyethylene (XLPE) insulated waterproof cable

• ‌characteristicHigh chemical stability, excellent waterproof performance, and effective resistance to moisture intrusion

• ‌Application scenarios: basements, swimming pools, food processing plants, etc

3. Mechanical stress environment

• ‌Applicable cablesSteel tape armored or steel wire braided armored control cables (KVV22, KYJV32, etc.)

• ‌characteristicEnhance mechanical strength and resist mechanical forces such as tension, compression, and torsion

• ‌Application scenariosElevator control, crane control, cable trench, pipeline, shaft, etc

4. Outdoor environment

• ‌Applicable cablesCables with excellent weather resistance and UV resistance

• ‌characteristicMust withstand natural factors such as wind, sun, rain, snow, and freezing

• ‌Application scenarios: Overhead power lines, outdoor equipment connections, etc