100/133/167MVA Oil Immersed Power Transformer for 230/34.5kV Grid Substations

100/133/167MVA Oil Immersed Power Transformer for 230/34.5kV Grid Substations

Winley’s 167MVA 230kV oil-immersed power transformer is engineered for efficient, reliable power delivery in utility substations, grid expansion, and large industrial facilities. Combining optimized electrical design, robust construction, and flexible cooling capacity, it supports long-term operation in demanding power networks.

Key Features & Advantages:

• Low-Loss & Low-Noise Design: Copper windings and grain-oriented silicon steel cores are combined with optimized insulation and cooling structures to minimize energy losses, operating noise, and temperature rise.

• Flexible Capacity for Changing Loads: Three-stage 100/133/167MVA cooling ratings allow the transformer to accommodate varying power demands, with forced-air cooling providing additional capacity when required.

• Leak-Resistant & Easy-Maintenance Construction: A robust oil tank, conservator-type oil preservation system, and detachable radiators with isolation valves help reduce leakage risks and simplify maintenance.

• Reliable Protection & Outdoor Performance: Integrated monitoring and protection devices, together with a NEMA 4X stainless steel control cabinet, support safe operation in outdoor substations.

Custom Manufacturing up to 230kV / 450MVA

With 35 R&D engineers and extensive experience in North American power projects, Winley offers customized transformer solutions covering electrical design, cooling systems, protection equipment, and project-specific requirements, supported by factory testing and technical documentation.

1. Copper Three-Winding Design

Copper windings with a 230/34.5/13.8kV configuration support high-capacity power transformation for utility substations and industrial distribution networks.

2. Three-Stage Cooling System

ONAN/ONAF1/ONAF2 cooling provides 100/133/167MVA capacity ratings, allowing the transformer to accommodate changing load demands.

3. Conservator-Type Oil Preservation

A conservator oil system with non-PCB Type II mineral oil supports insulation performance and long-term outdoor operation.

4. Detachable Radiators with Isolation Valves

Removable radiators and isolation valves simplify inspection, servicing, and maintenance of the cooling system.

5. Five-Position HV Tap Changer

A high-voltage de-energized tap changer provides a ±5% adjustment range to accommodate different system voltage requirements.

6. Integrated Monitoring & Protection

Oil and winding temperature monitoring, pressure protection, and a NEMA 4X stainless steel control cabinet support safe operation and convenient system monitoring.

1. Regional Power Distribution

Supports the growing electricity needs of cities, communities, and commercial districts, providing dependable power for everyday infrastructure.

2. Substation Expansion & Modernization

Ideal for utilities expanding grid capacity, replacing aging transformers, or upgrading substations to meet increasing power demand.

3. Heavy Industrial Facilities

Designed for large manufacturing plants, mining operations, and energy-intensive facilities where a stable power supply is essential to daily production.

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A: Winley provides clear capacity-based lead times after technical approval: 8–10 weeks for transformers below 10MVA, 10–12 weeks for 10–40MVA transformers, and 18–20 weeks for 40–100MVA transformers. For 230kV power transformers, the standard lead time is 20 weeks.We also provide a detailed production schedule and real-time manufacturing photos to help track progress.

A: We offer a flexible MOQ of just 1 unit. Complete inquiries are quoted within 1-3 days with 24/7 support. Leveraging our extensive North American experience in renewable energy, data centers and large industrial projects, we ensure highly cost-effective and reliable solutions.

A: Yes, We accept OEM and ODM. Winley provides services for power transformers up to 450MVA, with HV systems up to 230kV. We can customize electrical parameters, structure, fluid, protection, switches, gauges, tank and paint according to customer drawings, with the capability to integrate components from brands like Qualitrol, Eaton Cooper, and MR.

A: Yes. Winley Power transformers are engineered and manufactured in strict accordance with ANSI/IEEE, CSA, NEMA, relevant ASTM standards and IEC 60076.We bring a proven track record across the United States and Canada, supporting critical applications in industrial manufacturing, renewable energy, and power distribution across a range of capacity and voltage requirements.

A: We deliver a complete compliance package: approval drawings, datasheets, nameplate drawings, routine test reports, installation manuals and accessory manuals. We also back your project with lifetime documentation support.

A: Winley ensures quality through strict ISO 9001 process management with dedicated QC oversight. Prior to delivery, every unit undergoes comprehensive routine testing, including Winding Resistance, Turns Ratio, Polarity and Phase Relation, and No-Load Loss and Excitation Current tests. We also fully support Factory Acceptance Testing (FAT) and third-party inspections (SGS).

A: Yes. Winley Electric provides tailored, fully controllable transportation solutions for large-scale transformer projects to ensure compliant customs clearance and zero-damage delivery. We actively assist in verifying critical logistics factors, including shipping dimensions, total weight, offloading conditions, site accessibility, and lifting/rigging requirements.

A: 24 months from B/L. During the warranty period, If there are any accessory problems, just provide photos of damaged accessory, then we will provide free service. According to the number of products, we will provide easily damaged accessories for free. We can also provide technical support if you need.