Power cables are widely used in the backbone lines of power systems to transmit and distribute high-capacity electrical energy. Key application areas include:
- Urban underground power grids: Used in urban power transmission and distribution systems
- Power plant outgoing lines: Transmission lines connecting power plants to the grid
- Industrial and mining power supply: Providing electricity to factories, mines, and similar facilities
- Submarine and river-crossing transmission lines: Power transmission across bodies of water
- Distribution systems: Distributing power from substations to various points of consumption
- Special environments: Such as underground coal mines (MVV series cables), tunnels, conduit installations, and direct soil burial
- Industrial sector: Powering industrial electrical equipment, electric motors, welding machines, machine tools, etc.
- Building interiors: Power transmission within high-rise buildings
Power cables are categorized by voltage level into medium-low voltage (35 kV and below), high voltage (above 110 kV), extra-high voltage (275–800 kV), and ultra-high voltage (1000 kV and above); cables of different voltage levels are suited to varying transmission distances and capacity requirements.