1. Improved Waterproofing and Moisture-Proofing Performance
Oil-filled cables utilize petroleum jelly filling to fundamentally block moisture penetration pathways. Compared to gas-filled cables, which rely on external air pressure for waterproofing, they offer greater moisture-proofing reliability. Experiments have shown that the oil-filled structure effectively prevents moisture from entering the core cable, making it particularly suitable for underground installations.
2. Reduced Maintenance Costs
Oil-filled cables do not require constant pressure monitoring or dry gas replenishment, as is required for gas-filled cables. This significantly reduces routine maintenance. Long-term usage data shows that maintenance frequency for oil-filled cables is approximately 60% lower than for gas-filled cables.
3. Enhanced Structural Stability
Petroleum jelly filling buffers external mechanical stress, reducing the risk of internal damage from bending or squeezing. Under the same operating conditions, the average failure rate of oil-filled cables is 35% lower than that of gas-filled cables.
It should be noted that oil-filled cables have limitations such as a larger outer diameter (15% larger than non-oil-filled cables of the same specification) and inconvenient rewiring.