250kVA Oil Immersed Distribution Transformer Three Phase 11kv Copper Coil

Our transformers comply with GB 20052-2024 Level 2/3 & IEC 60076. S20/S22 models slash no-load loss by up to 30%, bringing lower TCO and reduced carbon emissions over their 30 year service life.

Self-cooling transformers run under 60 dB, complying with strict noise limits for residential & commercial use. Optimized core laminations and precise stacking cut vibration and noise.

Partial discharge levels are rigorously controlled below 100 pC through advanced vacuum drying and oil-filling processes, ensuring long-term insulation integrity and operational reliability.

Premium insulating frames secure coils internally; laser monoblock cut tank walls ensure robust structure. The design resists short-circuit intense electromagnetic forces, avoiding deformation and ins

Grooved sealing flanges, brass drain valves and vacuum butterfly radiator valves deliver leak-proof sealing, blocking oil seepage and moisture to sustain intact insulation for decades.

Optimized oil flow, corrugated tanks or external radiators sustain stable temps under heavy loads. Rated 40 degree centigrade ambient for reliable use in tropical and desert zones.

Full polishing & rust removal plus electrostatic powder coating yield appliance-grade surface finish. Compact size cuts installation space and eases on-site fitting.

Built for temporary overloads during industrial startup and peak loads, our transformers safely exceed rated capacity briefly without accelerated aging.

100% routine testing covers turn-ratio, winding resistance, no-load loss, and dielectric strength, with optional type tests and third-party witnessed inspections.

Customizable from 30kVA to 2500kVA and 6kV to 35kV, with flexible tap ranges, vector groups, and cooling configurations for diverse project needs.