Power Transformer Lubrication Map
A transformer lives or dies by its insulating fluid. Natural and synthetic esters add fire safety and longer insulation life; the cooling fans and fittings need the right grease too.
Click a number to see the product for that point. HUSKEY™ picks follow HUSKEY’s application chart; Shrieve, Luneta and transformer fluid picks follow the makers’ data. Always follow the equipment maker’s manual.
- 1Insulating & cooling fluidFR3® Natural EsterNatural ester fluids (FR3 from soybean, FR3r from rapeseed) and SE3 synthetic ester insulate and cool with a much higher fire point than mineral oil.Also: FR3r™ Natural Ester, SE3® Synthetic EsterTypical interval: Test the fluid yearly (DGA and quality).
- 2Cooling fan bearingsHUSKEY™ Coolube Grease
- 3Bushing terminals & connectionsHUSKEY™ HVS-100 Silicone GreaseNSF H1
- 4Cover & radiator boltsHUSKEY™ 341 Copper Anti-Seize Compound
Power Transformer Lubrication Questions
What lubricant should I use on power transformer insulating & cooling fluid?
We recommend FR3® Natural Ester for normal conditions. Natural ester fluids (FR3 from soybean, FR3r from rapeseed) and SE3 synthetic ester insulate and cool with a much higher fire point than mineral oil. Typical interval: Test the fluid yearly (DGA and quality).
What lubricant should I use on power transformer cooling fan bearings?
We recommend HUSKEY™ Coolube Grease for normal conditions, or HUSKEY™ 775 FMG Grease where NSF H1 food-grade is required. Fans run outdoors for years. A water-resistant high-speed grease keeps them turning. Typical interval: Every 6 to 12 months, or per fan maker.
What lubricant should I use on power transformer bushing terminals & connections?
We recommend HUSKEY™ HVS-100 Silicone Grease for normal conditions, or HUSKEY™ HTL-500 Grease where NSF H1 food-grade is required. Dielectric grease keeps moisture and corrosion off outdoor connections. Typical interval: At every outage.
What lubricant should I use on power transformer cover & radiator bolts?
We recommend HUSKEY™ 341 Copper Anti-Seize Compound for normal conditions, or HUSKEY™ FG-1800 Anti-Seize and Thread Sealing Compound where NSF H1 food-grade is required. Outdoor bolts rust in place. Anti-seize keeps covers and radiators serviceable. Typical interval: At every assembly.
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