Product Overview

The 69kV three-phase oil-immersed power transformer is designed for utility substations, industrial power systems, renewable energy facilities, and medium-to-high voltage transmission and distribution networks. It provides reliable voltage transformation for power generation, regional distribution, industrial loads, and renewable energy grid connection.

69kV transformers are particularly common in North American power systems, especially in the United States and Canada, and are also suitable for selected industrial and utility projects in Latin America, Asia-Pacific, Africa, and other markets where 69kV-class systems are specified.

• Capacity: Available from small and medium ratings to large customized configurations
• Voltage Class: 69kV, with customized primary and secondary voltages
• Frequency: 50Hz / 60Hz
• Cooling: ONAN / ONAF and customized cooling options
• Tap Changer: OLTC or off-circuit tap changer available
• Design Life: More than 30 years under proper operating conditions
• Installation: Outdoor or indoor installation according to project requirements

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Product Advantages

Reliable 69kV Grid Performance

The transformer is designed for continuous operation in utility and industrial power systems, providing stable voltage transformation and dependable electrical performance.

The winding, core, insulation and cooling systems can be customized according to the required capacity, voltage ratio, short-circuit level and operating conditions.

Flexible Industrial & Utility Applications

69kV oil-immersed transformers are suitable for a wide range of applications, including:

• Utility substations
• Industrial plants
• Mining projects
• Oil & gas facilities
• Data centers
• Manufacturing facilities
• Commercial power systems
• Renewable energy substations
• Solar PV and wind power projects

Renewable Energy Integration

For renewable energy projects, 69kV transformers can be used for collector substations and grid interconnection systems. They can be configured according to the voltage and protection requirements of solar PV, wind power and other distributed or utility-scale renewable energy projects.

Adaptable to Different Environments

The transformer can be engineered for hot, cold, humid, coastal, high-altitude and industrial environments.

Depending on site conditions, optional solutions include enhanced cooling, anti-corrosion treatment, increased creepage distance and customized insulation systems.

Typical 69kV Application Markets

69kV is especially relevant to the United States and Canada, where 69kV-class networks are widely used for utility and industrial power transmission and distribution.

Other potential markets include:

• North America: United States, Canada, Mexico
• Latin America: Brazil, Chile, Argentina, Peru, Colombia and other industrial and utility markets
• Asia-Pacific: Australia, the Philippines, Indonesia and selected industrial power systems
• Africa: South Africa and other markets with industrial and utility substation projects
• Other Markets: Regions using 69kV-class systems for industrial facilities, renewable energy interconnection and regional substations

The final transformer voltage, capacity, insulation level and accessories should be confirmed according to the local grid code and project specification.

Why Choose HENGFENGYOU Electric for Your 69kV Projects?

Customized Transformer Design

HENGFENGYOU Electric can configure the transformer according to the project's electrical and environmental requirements, including:

• Rated capacity
• Primary and secondary voltage
• Frequency
• Impedance
• Vector group
• Tap range
• Cooling system
• Insulation level
• Installation environment

Quality Manufacturing & Testing

Each transformer is manufactured under controlled production processes and tested before delivery.

Depending on the project requirements, factory testing can include:

• Voltage ratio test
• Winding resistance test
• No-load loss and current test
• Load loss and impedance test
• Dielectric tests
• Induced voltage test
• Temperature-rise test
• Partial discharge test where required

Technical Support

From technical specification and product design to factory testing, transportation, installation guidance and commissioning support, HENGFENGYOU Electric provides technical assistance throughout the project lifecycle.

Ordering Instructions

Please provide the following information for quotation:

• Rated Capacity: Transformer capacity and overload requirements
• Voltage: Primary and secondary voltage
• Frequency: 50Hz or 60Hz
• Transformer Parameters: Impedance, vector group, losses and tap range
• Operating Conditions: Temperature, altitude, humidity, pollution level and installation location
• Tap Changer: OLTC or off-circuit tap changer requirements
• Accessories: Bushings, conservator, Buchholz relay, temperature indicators and monitoring devices
• Special Requirements: Oil type, color, anti-corrosion treatment and other customization
• Minimum Order Quantity: 1 set
• Delivery: Subject to final technical specifications and production schedule