110 kV Power Transformer 20–315 MVA for Utility Substations Transmission Networks and Power Grid Applications

1. Introduction – Reliable 110 kV Power Transformers for Modern Grids

Yawei Transformer manufactures 110 kV power transformers with capacities ranging from 20 to 315 MVA, engineered for utility substations, transmission networks, and critical power grid applications. These oil-immersed high-voltage transformers are designed to provide reliable, efficient, and long-lasting power transfer under extreme electrical, thermal, and environmental conditions.

Our 110 kV platform supports utility modernization, grid expansion, and renewable energy integration. With compliance to ANSI, IEEE, and IEC standards, Yawei Transformers are suitable for North American, European, and global utility projects. Factory-direct supply, wholesale options, and fully custom designs ensure every customer can source exactly what their grid or project requires.

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2.10 kV Power Transformer Technical Specifications

Parameter	Specification
Rated Voltage	Up to 110 kV (design capability up to 500 kV)
Rated Capacity	20–315 MVA (full product range 15–1200 MVA)
Transformer Type	Oil-immersed High Voltage Power Transformer
Phase	Three-phase (single-phase available on request)
Cooling Method	ONAN / ONAF / OFAF (customizable)
Insulation System	Full oil-paper insulation
Winding Configuration	Delta/Wye, Wye/Wye, or custom vector groups
Frequency	50 Hz / 60 Hz
Tap Changer	Off-circuit tap changer or On-Load Tap Changer (OLTC)
Impedance Voltage	10–15% standard, customizable
Short-Circuit Withstand	25–30 kA
Noise Level	≤75 dB
Protection	Buchholz relay, temperature sensors, pressure relief device
Standards Compliance	IEC / ANSI / IEEE
Installation	Outdoor, utility substations, transmission networks
Supply Mode	Factory direct, OEM/ODM, custom orders

3. Brand Excellence – Why Choose Yawei Transformer

Yawei Transformer is recognized globally for its high-voltage power transformer solutions. With decades of engineering and manufacturing experience, Yawei delivers transformers that combine reliability, efficiency, and durability. Our focus on innovation, research, and strict quality control ensures that every transformer can withstand long-term operational challenges in utility and industrial grids.

Our factory-direct model provides full traceability, competitive pricing, and stable delivery schedules, making us a trusted partner for utilities, EPC contractors, and infrastructure developers worldwide.

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4. Wide Range of Applications

Our 110 kV transformers are tailored for:

• Utility substations and regional distribution networks

• Transmission network modernization and expansion

• Industrial substations with high-load or critical power needs

• Renewable energy integration and transmission corridors

• Grid interconnection points and national power networks

By offering solutions for both new construction and capacity upgrades, Yawei Transformers help utilities meet growing demand while improving grid reliability.

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5. Manufacturing Excellence and Factory Capabilities

Yawei Transformer operates state-of-the-art production facilities capable of producing transformers up to 500 kV and 1200 MVA. Every stage of manufacturing is strictly monitored, including:

• Large-capacity core cutting, stacking, and core annealing

• Precision winding and insulation forming workshops

• Vacuum drying, oil-filling, and sealing systems

• Routine, type, and special testing laboratories

Our manufacturing excellence ensures uniform quality, low loss, and long service life for every transformer. Factory-direct production enables competitive wholesale pricing, reliable supply, and full project traceability.

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6. Custom Engineering for Project-Specific Requirements

Yawei Transformer provides tailored solutions for unique project needs:

• Customized voltage ratios, impedance, and tap changer designs

• Special insulation, low-loss cores, and noise reduction options

• Adaptation for extreme climates, high-humidity, or coastal environments

• Compliance with ANSI / IEEE or IEC standards

• OEM/ODM services for contractors and industrial clients

This flexibility allows our transformers to support utility, industrial, and transmission projects anywhere in the world.

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7. Testing and Quality Assurance

Every 110 kV transformer undergoes comprehensive testing to ensure reliability and compliance with international standards:

• Routine electrical and mechanical tests

• Type tests for full operational verification

• Special tests for insulation integrity, short-circuit withstand, and thermal performance

• Partial discharge and acoustic testing for long-term stability

Strict quality control ensures every transformer performs reliably under high-load conditions and extreme environmental factors.

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8. Price and Value Proposition

Yawei Transformers offer exceptional value through:

• Factory-direct pricing and competitive wholesale options

• Reduced maintenance and operational costs due to high reliability

• Energy-efficient design lowering long-term energy losses

• Flexible supply options for single units or complete fleets

Investing in a Yawei transformer ensures maximum operational uptime, reduced lifecycle costs, and high ROI for utility and industrial customers.

9. International Project Experience

Yawei Transformer has successfully delivered 110 kV transformers to:

• North American utility substations

• European transmission network upgrades

• Southeast Asian industrial grids

• Middle Eastern infrastructure projects

Our global logistics, compliance documentation, and on-site coordination expertise guarantee smooth project execution, from manufacturing to commissioning.

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10. Sustainability and Efficiency

Yawei 110 kV transformers are designed with energy efficiency and environmental responsibility in mind:

• Low-loss core and winding materials reduce operational energy consumption

• Advanced cooling systems optimize thermal efficiency

• Noise reduction technology for urban and industrial deployment

• Long-life insulation systems minimize environmental impact and replacement frequency

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11. Landmark Projects and Case Studies

Yawei Transformer has delivered key 110 kV transformer projects demonstrating advanced engineering capabilities:

• Fully customized 110 kV transformers for regional transmission upgrades

• Integration with renewable energy grids, ensuring stable high-voltage delivery

• Long-term operation in high-load industrial substations with minimal maintenance

These projects highlight Yawei’s ability to meet stringent technical, regulatory, and environmental requirements for utility and industrial clients worldwide.

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12. Full Product Portfolio – Supporting 15–1200 MVA and Up to 500 kV

Beyond the 20–315 MVA 110 kV range, Yawei Transformer provides:

• Voltages up to 500 kV

• Capacities from 15–1200 MVA

• Solutions for utility, transmission, and industrial applications

• Single-unit supply or full transformer fleet procurement

This ensures customers can source all power transformer needs from one trusted manufacturer, simplifying supply chain management and project execution.

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13. Why Partner with Yawei Transformer

• Leading global manufacturer and supplier of high-voltage transformers

• Full range of 110 kV power transformers 20–315 MVA

• Custom engineering, OEM/ODM, and wholesale solutions

• Proven reliability, efficiency, and long service life

• International project experience and technical support

• Competitive factory-direct pricing and stable delivery

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14. Contact and Ordering Information

Contact Yawei Transformer today for detailed specifications, quotes, or custom engineering consultations. Our team provides support throughout the project lifecycle, from design to installation and commissioning.

From 110 kV, 20–315 MVA transformers to customized high-voltage solutions up to 500 kV, Yawei Transformer delivers reliable, efficient, and future-ready power transformers worldwide.