Overhead conductor greases (also called overhead line greases, conductor anti-corrosion greases, or stranding greases) are specialized protective lubricants designed exclusively for bare overhead power transmission and distribution conductors—such as ACSR (aluminum conductor steel-reinforced), OPGW, HTLS, and overhead ground wires.
They are not general-purpose greases; they are formulated to meet strict power industry standards like EN 50326, IEC 61394, ENA ER L38, and Chinese grid specifications.
Core Purposes
Anti-corrosion & rust prevention
Protect steel cores and aluminum strands from salt spray, acid rain, industrial pollution, humidity, and atmospheric oxidation.
Reduce inter-strand friction & wear
Prevent abrasion and fatigue cracking caused by aeolian vibration, galloping, and wind-induced movement between conductor layers.
Seal out moisture & water
Form a continuous waterproof film to stop water penetration into the conductor interior.
Extend service life
Typically extend conductor life from 20–25 years to 30–40+ years.
Lower maintenance costs
Reduce inspections, repairs, and early replacement.
Key Properties Required
Excellent adhesion (does not run off at high temperatures)
Low-temperature flexibility (no cracking at −40°C or lower)
High-temperature stability (no oil separation at 100–150°C)
Water-repellent and non-emulsifying
Neutral to aluminum and steel (non-corrosive)
UV-resistant and long-term aging resistance
Compatible with fittings and composite materials
