The role of 35kV optical cable

A 35kV optical cable combines medium-voltage power transmission with embedded optical fibers for data communication, enabling efficient electricity distribution and real-time monitoring.

Power Transmission Function

A 35kV optical cable is primarily designed for medium-voltage power distribution, typically ranging from 1kV to 35kV, which serves industrial facilities, utility substations, and large-scale renewable energy projects . The higher voltage allows for lower current at the same power level, reducing conductor size, resistive losses, and improving efficiency over long distances . These cables can be installed indoors, outdoors, underground, or in ducts, and are suitable for wet or dry environments, with temperature ratings down to -40°C .

Optical Fiber Function

In addition to power transmission, 35kV optical cables often include embedded optical fibers for data communication and monitoring. This allows utilities and industrial operators to implement real-time control, fault detection, and telemetry over the same cable used for electricity delivery . In submarine or composite designs, the optical fibers maintain high transmission capacity and reliability even in harsh environments, such as underwater or exposed outdoor installations .

Applications

• Utility substations and feeders: Distributing medium-voltage power efficiently while enabling remote monitoring .
• Renewable energy projects: Connecting solar farms or wind installations to the grid, reducing transmission losses and supporting SCADA systems .
• Industrial and commercial facilities: Powering large equipment while providing communication channels for operational control .
• Submarine or hybrid systems: Delivering power and data across water bodies or long distances with robust insulation and armor .

Advantages

• Operational efficiency: Lower resistive losses due to higher voltage and optimized conductor sizing .
• Integrated monitoring: Optical fibers allow for real-time data collection and system diagnostics .
• Versatility: Can be installed in various environments, including direct burial, ducts, or exposed outdoor locations .
• Durability: XLPE insulation and armored designs provide mechanical protection and long service life . In summary, a 35kV optical cable serves the dual purpose of efficient medium-voltage power transmission and high-capacity data communication, making it essential for modern utility, industrial, and renewable energy infrastructure.