The 138kV / 140kV / 150kV Three-Phase Oil-Immersed Power Transformer is designed for high-voltage transmission and substation applications, providing reliable voltage transformation for utility grids, industrial power systems, renewable energy projects, and large-scale infrastructure. Manufactured with high-quality magnetic cores, optimized winding structures, high-strength insulation systems, and transformer oil cooling technology, the transformer delivers stable performance, low losses, strong short-circuit resistance, and long service life. Customized designs are available according to project voltage, capacity, frequency, impedance, cooling method, installation environment, and applicable international standards.
Zisheng are a professional 19+ years manufacturer in producing Oil-Immersed Transformers, Compact Substation, Pad Mounted Transformers, Pole Mounted Transformers and Dry Type Transformers. We own the certificates of ISO/CE/IEC 60076 and TUV Rheinland.
Transformers undergo rigorous FAT and type testing, support voltage/capacity customization. Welcome to consult for Catalog and Product. you can contact us at email [email protected].
The 138kV / 140kV / 150kV Three-Phase Oil-Immersed Power Transformer is designed for high-voltage power transmission, grid interconnection, and large-scale substation applications. Its customized electrical and mechanical configuration makes it suitable for utility, industrial, renewable energy, and infrastructure projects.
Used in 138kV–150kV transmission and distribution substations to step voltage up or down and provide reliable power transmission between different voltage levels.
Typical applications:
Suitable for connecting large power generation facilities to high-voltage transmission networks.
Applications include:
The transformer can be used as a grid step-up transformer for utility-scale photovoltaic projects, connecting medium-voltage collector systems to 138kV–150kV transmission networks.
Suitable for:
Designed for high-capacity wind power transmission systems, providing reliable voltage transformation between the wind farm collection network and the utility grid.
Applications include:
Suitable for large mining operations requiring high-capacity and reliable power supply.
Applications include:
The transformer can be customized for demanding environments such as high temperature, high altitude, dust, humidity and remote locations.
Used in high-voltage substations supporting large oil and gas facilities.
Typical applications:
Provides reliable high-voltage power transformation for energy-intensive industrial facilities.
Suitable for:
Steel Mills → Cement Plants → Chemical Plants → Manufacturing Facilities → Metal Processing → Large Industrial Complexes
The transformer can be integrated into high-voltage substations serving large data centers and other facilities requiring stable and reliable electrical power.
Customized redundancy, protection, monitoring and cooling configurations can be provided according to project requirements.
Suitable for major infrastructure developments with high electrical demand, including:
The transformer is particularly suitable for EPC contractors and turnkey substation projects.
Zisheng can support the project through:
Technical Specification Review → Engineering Design → Manufacturing → Factory Testing → Export Packing → Delivery → Installation & Commissioning
Customized solutions can be provided according to the project’s capacity, voltage ratio, frequency, impedance, vector group, cooling system, insulation level, tap range, environmental conditions and applicable standards.
| Application | Main Purpose |
|---|---|
| Utility Substation | Grid voltage transformation |
| Solar Power Plant | Renewable energy grid connection |
| Wind Farm | High-voltage power transmission |
| Mining | High-capacity industrial power supply |
| Oil & Gas | Plant and infrastructure power supply |
| Steel & Cement | Heavy industrial power distribution |
| Data Center | Reliable high-voltage power supply |
| Infrastructure | Large-scale power transmission |
| Grid Interconnection | Connection between generation and utility networks |
| EPC Projects | Customized turnkey substation solutions |
It is a high-voltage three-phase transformer designed for power transmission, grid substations, industrial facilities, renewable energy projects, and large-scale infrastructure. It uses transformer oil for electrical insulation and cooling.
The transformer can be manufactured with different capacities ranging from several MVA to hundreds of MVA. The final rated capacity is customized according to the project’s load requirements and grid design.
Yes. The transformer can be engineered for 138kV, 140kV, 150kV, or other project-specific voltage requirements. The insulation level and other electrical parameters are designed accordingly.
Yes. Both 50Hz and 60Hz designs are available for different international markets and grid systems.
Depending on transformer capacity and operating conditions, the available cooling methods include:
Yes. An On-Load Tap Changer (OLTC) can be supplied when automatic or continuous voltage regulation under load is required. Tap range and control configuration can be customized.
The transformer can be designed and manufactured according to applicable IEC, IEEE, ANSI standards or customer-specific technical specifications.
Yes. The HV/MV/LV voltage ratio, vector group, impedance, tap range, neutral arrangement and insulation level can be customized according to the project requirements.
Yes. It can be used for utility-scale solar PV plants, wind farms and renewable energy substations, particularly for connecting medium-voltage collection systems to high-voltage transmission networks.
Yes. The design can be adapted for demanding environments such as high temperatures, high altitudes, coastal areas, high humidity, desert conditions and dusty industrial sites.
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