Oil Immersed Power Transformer

Our oil immersed power transformer uses an oriented silicon-steel core, copper windings, mineral-oil insulation, and a capacity-matched radiator arrangement. Tap and terminal details are configured for the project voltage ratio. The SW-S oil-immersed station transformer is designed for 35 kV-class auxiliary supply where outdoor durability and established oil insulation are preferred. Its active part consists of a laminated core, concentrically arranged windings, insulation barriers, leads, and tap connections. The active part is dried and placed in a sealed tank filled with qualified insulating oil. Natural oil circulation transfers internal heat to corrugated walls or external radiators. The design can accommodate different vector groups, tap ranges, impedance values, bushing arrangements, and monitoring accessories. Engineering confirmation should cover system earthing, lightning impulse level, pollution level, ambient range, altitude, seismic duty, terminal orientation, neutral loading, and protection settings. Before commissioning, the installer should inspect transport locks, tank deformation, leaks, oil level, pressure-relief components, bushing torque, core grounding, terminal identification, and test certificates. Sampling and maintenance intervals should follow the operating utility's transformer practice.

Electromagnetic induction transfers energy between isolated windings at the specified voltage ratio. The magnetic core guides flux, while the insulation and cooling structure maintain dielectric strength and temperature rise within design limits.