Oil-immersed transformer cores form the magnetic heart of liquid-filled power and distribution transformers. The transformer core provides a low-reluctance magnetic path while the surrounding insulating oil performs dual roles: electrical insulation and heat removal from windings and core, enabling higher capacities and reliable outdoor service in demanding environments.
Product Details
· Superior cooling & overload capacity: Oil immersion provides effective convective cooling that supports higher continuous and short-time overloads.
· Low audible noise & mechanical stability: Tight core clamping and optimized laminations reduce vibration and noise in service.
· Energy savings with amorphous cores: For utility/distribution applications, amorphous-metal cores can deliver measurable no-load loss reductions and lifecycle cost savings.
· Field-proven outdoor reliability: Oil-filled designs are widely used for outdoor and high-kVA installations due to robust dielectric and cooling performance.
· Core: Cold-rolled oriented silicon steel (laminated) or amorphous ribbon stacks; vacuum-annealed and assembled to minimize flux leakage.
· Windings & oil passages: Layered or disc windings with designed oil channels for uniform cooling.
· Tank & accessories: Radiators/conservator, breathers, Buchholz relay, temperature gauges and oil filtration ports for long-term maintenance.
Oil-immersed transformer cores are ideal for: distribution transformers (pad-mounted, pole-mounted), medium/large power transformers, energy storage interconnects, renewable plant step-up transformers, and industrial substations requiring reliable outdoor performance.
Q: Why choose oil-immersed transformer cores over dry-type?
A: Oil immersion gives superior cooling and dielectric properties for higher kVA and outdoor applications; dry-type suits indoor/compact installations.
Q: Are transformer amorphous cores always better?
A: Amorphous cores reduce no-load losses significantly but have different mechanical/production tradeoffs; they are most economical where no-load loss dominates lifecycle cost.
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