Key differences
Oil-immersed transformers use insulating oil for cooling and insulation, offering higher capacity and efficiency at lower cost — ideal for outdoor and utility use. Dry-type transformers use air/resin insulation, are fire-safe and low-maintenance, and are preferred indoors and in fire-sensitive locations.
- Oil-immersed: higher capacity, lower cost, outdoor, needs oil maintenance.
- Dry-type: fire-safe, low maintenance, indoor, slightly higher cost.
FAQ
Which is better, oil-immersed or dry-type transformer?
It depends on the application. Oil-immersed is more efficient and cost-effective for outdoor/utility use; dry-type is safer for indoor and fire-sensitive environments. Voltspan supplies both.