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Power Transformer

Power transformer models for utility, substation and industrial projects, with project-specific voltage, capacity and accessories reviewed by ZBB engineers.

Send a specification, drawing or nameplate photo. Technical feedback and project documentation can be reviewed with the quotation.
Match the transformer to your project
Product focusPower transformers
Capacity500 kVA to 200 MVA model ranges
VoltageMedium and high-voltage classes by model
PhaseThree-phase project configurations
ApplicationsUtility, substation and industrial loads
StandardsIEC / ANSI / IEEE
Send your specifications
Custom configurationVoltage, capacity and accessories
Factory test reportsDocumentation for project approval
Global project supportExport coordination from Shanghai
Fast engineering responseDrawings and quotations reviewed quickly

Find the right fit

Available configurations for your project

Review the related models and published parameters below. If your voltage, capacity or installation condition is different, send the requirement directly to our engineering team.

500 kVA Power Transformer

Power transformers

500 kVA Power Transformer

This 500 kVA, 34.5kV/0.48kV mineral-oil-immersed ONAN distribution transformer, engineered to meet ANSI/IEEE standards, delivers reliable, cost-effect...
  • Cooling TypeONAN
  • Primary Voltage34.5 kV
  • Secondary Voltage0.48 kV
  • Frequency60 Hz
View product details
1 MVA Power Transformer

Power transformers

1 MVA Power Transformer

This 1 MVA mineral-oil-immersed power transformer, built to ANSI/IEEE standards, delivers reliable, efficient performance at 60Hz for utility, commerc...
  • Cooling TypeONAN
  • Primary Voltage34.5 kV
  • Secondary Voltage0.48 kV
  • Frequency60 Hz
View product details
2.5 MVA Power Transformer

Power transformers

2.5 MVA Power Transformer

This 2.5 MVA mineral-oil-immersed power transformer, built to ANSI/IEEE standards, delivers reliable, efficient performance at 60Hz for utility, comme...
  • Cooling TypeONAN
  • Primary Voltage34.5 kV
  • Secondary Voltage12.47 kV
  • Frequency60 Hz
View product details
5 MVA Power Transformer

Power transformers

5 MVA Power Transformer

This 5 MVA mineral-oil-immersed power transformer, engineered to ANSI/IEEE standards, provides reliable, efficient power conversion at 60Hz for utilit...
  • Cooling TypeONAN
  • Primary Voltage69 kV
  • Secondary Voltage12.47 kV
  • Frequency60 Hz
View product details
10 MVA Power Transformer

Power transformers

10 MVA Power Transformer

This 10 MVA mineral-oil-immersed power transformer, engineered to ANSI/IEEE standards, provides reliable, efficient power conversion at 60Hz for utili...
  • Cooling TypeONAN / ONAF
  • Primary Voltage69 kV
  • Secondary Voltage13.8 kV
  • Frequency60 Hz
View product details
20 MVA Power Transformer

Power transformers

20 MVA Power Transformer

This 20 MVA mineral-oil-immersed power transformer, engineered to ANSI/IEEE standards, provides reliable, efficient power conversion at 60Hz for utili...
  • Cooling TypeONAF
  • Primary Voltage115 kV
  • Secondary Voltage34.5 kV
  • Frequency60 Hz
View product details
50 MVA Power Transformer

Power transformers

50 MVA Power Transformer

This 50 MVA mineral-oil-immersed power transformer, engineered to ANSI/IEEE standards, delivers reliable, efficient power conversion at 60Hz for utili...
  • Cooling TypeONAF
  • Primary Voltage115 kV
  • Secondary Voltage34.5 kV
  • Frequency60 Hz
View product details
100 MVA Power Transformer

Power transformers

100 MVA Power Transformer

This 100 MVA, 230/115 kV mineral-oil-immersed power transformer with OFAF cooling, engineered to ANSI/IEEE standards, delivers reliable, high-efficien...
  • Cooling TypeOFAF
  • Primary Voltage230 kV
  • Secondary Voltage115 kV
  • Frequency60 Hz
View product details
200 MVA Power Transformer

Power transformers

200 MVA Power Transformer

This 200 MVA mineral-oil-immersed power transformer, designed for 230kV primary / 115kV secondary operation with OFAF cooling at 60Hz, is engineered t...
  • Cooling TypeOFAF
  • Primary Voltage230 kV
  • Secondary Voltage115 kV
  • Frequency60 Hz
View product details

Why this solution

Selected for your operating conditions

China ZBB Group Shanghai Transformer Co., Ltd.'s power transformer solutions encompass a full range of product lines to meet diverse power needs. Among them, both dry-type and oil-immersed transformers support various designs and winding configurations. In terms of distribution transformers, the 10kV SC(B)H series with amorphous alloy cores stands out for its excellent energy efficiency, making it an ideal choice for urban and industrial scenarios. In the field of three-phase transformers, models such as the 35kV SC(B) series deliver stable performance, providing reliable support for medium-voltage power grids. For high-voltage requirements, the 110kV and 220kV oil-immersed transformers feature low loss, strong short-circuit resistance, and intelligent voltage regulation functions, making them widely applicable to large substations and power plants. All products strictly comply with industry standards, offering customers efficient and trustworthy power solutions.

  1. It covers types such as dry - type and oil - immersed transformers. It supports single - phase and three - phase designs and is adaptable to winding configurations including double - winding, three - winding, and autotransformer, flexibly meeting the needs of diverse power scenarios.

  2. Made of high - quality silicon steel sheets and advanced insulating materials, combined with iron cores of high magnetic permeability and low loss, it is energy - efficient and highly effective, with a long service life, low failure rate, and compliance with IEC/GB energy - saving standards.

  3. Equipped with multiple cooling solutions like natural circulation and forced air cooling (such as ONAN, ONAF, etc.), it can calmly cope with high - load and extreme climate conditions (such as the hot and arid regions in the Middle East, and the extremely cold regions in Russia).

Typical project priorities

  • Stable power distribution and voltage transformation
  • Selection based on load, environment and installation method
  • Drawings, nameplate data and technical documents for review
  • Export packaging and delivery coordination
Discuss your application

How ZBB supports the project

From selection to shipment

We start with three practical questions: what the transformer must do, where it will operate and what documentation the project requires.

04

Reliable After-Sales Service

Remote guidance, comprehensive documentation, and third-party inspection support (e.g., SGS, BV, TUV) ensure peace of mind.

03

Flexible Delivery

With complete production lines and mature procurement, we support urgent project delivery efficiently.

02

Fast Response

Quick feedback on technical drawings and quotations; prompt delivery of technical data after design confirmation.

01

Strong Customization Ability

We tailor size, wiring, and special structures (e.g., high altitude, extreme cold) based on customer drawings and usage scenarios.

Certifications & Quality Highlights

Evidence Behind Our Manufacturing Process

Review available certificates and ask which routine tests, standards and third-party witnessing options apply to your project.

Manufacturing visibility

See the production environment behind the quotation

Winding, casting, curing and testing are coordinated with the technical documentation supplied for the project.

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Before you send an inquiry

Questions before you request a quote

If your question is not listed, include it in the message. Our team can address it together with the technical review.

Are your transformers ANSI/IEEE compliant?
Yes. All U.S.-bound transformers are designed per ANSI/IEEE C57.12 series. UL listing available upon request.
What is your warranty?
2 years (extendable upon negotiation).
Can you provide third-party test reports?
Yes. We provide complete factory test reports. Third-party witnessed testing can be discussed on a per-project basis.
What is the minimum lead time for emergency orders?
As fast as 15 days for emergency replacements (strategic material reserve).
Do you have a U.S. warehouse or local support?
Main shipping from Shanghai. Remote technical support and on-site service coordination available.

Next step

Get a transformer configuration for your project

Share the information you already have. A complete specification is helpful, but you can start with the transformer type, capacity, voltage and application.

  • Reply from the technical team
  • Product recommendation and quotation
  • Factory test and export documentation support
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