Three Phase Oil-Immersed Distribution Transformer 100kVA–2500kVA 11kV–35kV IEC 60076 Manufacturer

Product Overview

Designed for utility grids, industrial plants, commercial facilities, and renewable energy projects, TNNPI three-phase oil-immersed distribution transformers provide reliable power distribution from 100kVA to 2500kVA. Manufactured in accordance with IEC 60076, ANSI/IEEE C57, and other international standards, our transformers deliver high efficiency, low losses, and dependable operation in demanding environments worldwide.

High Efficiency Core Design

Built with premium CRGO silicon steel or optional amorphous alloy core materials, the transformer minimizes no-load losses while maintaining stable magnetic performance. Precision core assembly reduces vibration and operating noise, helping utilities improve overall energy efficiency.

• Low no-load and load losses
• Low operating noise
• High efficiency performance
• Optional amorphous alloy core

Reliable Construction for Long Service Life

The transformer tank is fabricated from high-quality welded steel with anti-corrosion surface treatment suitable for tropical, coastal, and high-humidity environments. Copper or aluminum windings are vacuum dried and oil impregnated to improve insulation strength and thermal stability.

• Fully sealed maintenance-free design
• Mineral oil or FR3 biodegradable oil optional
• Excellent short-circuit withstand capability
• Long mechanical and electrical lifespan

Flexible Design for Global Projects

Every transformer can be customized according to local utility specifications, including voltage class, vector group, cooling method, impedance, tap changer, and enclosure finish. Products comply with IEC, ANSI, BS, GOST, SANS and other regional requirements.

• Voltage up to 35kV
• Copper or aluminum winding
• Dyn11, Yyn0 and customized vector groups
• ONAN / ONAF cooling options
• OEM & ODM supported

Factory Manufacturing & Quality Assurance

Every transformer undergoes routine factory testing before shipment, including ratio testing, insulation resistance, induced voltage testing, impedance measurement, and temperature rise verification to ensure reliable field performance.

• IEC 60076 compliant testing
• ISO 9001 certified manufacturing
• Factory acceptance test available
• Export experience across Africa, Southeast Asia and South America

Typical Applications

• Utility power distribution
• Industrial manufacturing plants
• Commercial buildings
• Mining projects
• Renewable energy plants
• Rural electrification
• Infrastructure projects
• Data centers

General Technical Parameters