What We Offer
Oil Immersed Power Transformers for Reliable Distribution
Explore our high-efficiency oil immersed transformers designed for power utilities, industrial plants, and substations. Built with low loss silicon steel cores, sealed tank structure, and customizable voltage up to 220kV.
Three Phase Oil Immersed Power Transformer
Capacity: 500kVA–50MVA
Voltage: Up to 110kV
Cooling: ONAN / ONAF / OFAF
Features: Stable operation, high reliability, substation applications
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Voltage: Up to 110kV
Cooling: ONAN / ONAF / OFAF
Features: Stable operation, high reliability, substation applications
Oil Immersed Distribution Transformer
Capacity: 30kVA–2500kVA
Voltage: 6kV–35kV
Cooling: ONAN
Features: Low loss, reliable performance, widely used in power distribution systems
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Voltage: 6kV–35kV
Cooling: ONAN
Features: Low loss, reliable performance, widely used in power distribution systems
Oil Immersed Current Transformer
Voltage: Up to 220kV
Frequency: 50Hz / 60Hz
Accuracy Class: 0.2 / 0.5 / 1.0
Features: High accuracy measurement, stable insulation performance, suitable for power metering and protection in substations and power systems
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Frequency: 50Hz / 60Hz
Accuracy Class: 0.2 / 0.5 / 1.0
Features: High accuracy measurement, stable insulation performance, suitable for power metering and protection in substations and power systems
Expert Guidance for Your Project
Not Sure Which Transformer You Need?
Tell us your voltage, capacity, and application. Our engineers will recommend the best oil immersed transformer and provide a fast quotation within 24 hours.
Custom Transformer Solutions
Need a Transformer Designed for Your Exact Requirements?
We provide fully customized oil immersed transformers tailored to your project. From winding design to cooling method and tap changer options, every detail is engineered to ensure optimal performance and seamless integration.
Custom voltage up to 220kV
Capacity from 30kVA to 240MVA
Multiple cooling methods available
Custom vector group supported
On-load tap changer optional
Designed for utility & industrial projects
We have more than
10 years experience in transformer manufacturing.
10 years experience in transformer manufacturing.
Get Transformers with Reliable Quality Assurance
You get a fully customized oil immersed transformer built under strict quality control. From design to testing, every step ensures stable performance, reduced failure risk, and long-term operational reliability.
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Why Choose Us
A Reliable Manufacturer You Can Trust
You need more than just a transformer supplier. You need a reliable manufacturer that delivers customized solutions, consistent quality, and strong technical support for your power distribution projects.
10 Years Manufacturing Experience
Benefit from over 10 years of transformer manufacturing expertise. Our experienced engineering and production teams ensure reliable design, stable performance, and consistent quality for your oil immersed transformer projects.
Custom Design for Your Project
You get transformers tailored to your voltage, capacity, and application requirements, ensuring seamless integration and reliable system performance.
Strict Quality Control
You receive transformers built with premium materials and tested before delivery to ensure long-term stability and reduced failure risk.
Strong Manufacturing Capability
You benefit from advanced production equipment and experienced engineers, ensuring consistent quality and reliable delivery.
Trusted by Customers Worldwide
You partner with a globally experienced supplier. Our oil immersed transformers are exported to multiple countries, supporting utility, industrial, and renewable energy projects.
Testimonials
What Our Global Customers Say
See why customers from different countries choose our transformers for power distribution, substations, and industrial applications. Reliable quality, customization support, and fast delivery make us a trusted partner.
David Wilson
USA
The oil immersed transformer quality is excellent. Stable operation and very low noise. The engineering team helped us select the right model quickly.
Carlos Ramirez
Mexico
We purchased pad mounted transformers for our utility project. Good workmanship and fast delivery. Everything matched our specifications.
Ahmed Hassan
UAE
Reliable power transformer supplier. The customization options helped us meet our substation requirements perfectly.
Nguyen Minh
Vietnam
The dry type transformer performance is very stable. Installation was easy and technical support was very professional.
Daniel Moyo
South Africa
We ordered pole mounted transformers. Competitive price and solid build quality. Will cooperate again.
Trusted by 1000+ Power Utilities & Industrial Customers Worldwide
With installations across various industries, our transformers operate in substations, factories, and infrastructure projects. We deliver customized designs, stable performance, and dependable operation for global customers.
F. A. Q
Frequently Asked Questions
You may have questions about transformer selection, customization, delivery, and support. Here are answers to help you choose the right transformer for your project.
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How do I choose the right transformer for my project?You can share your voltage, capacity, frequency, and application. Our engineers will recommend the most suitable oil immersed, dry type, or power transformer based on your requirements.
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Can you customize transformers based on our specifications?Yes. You can customize voltage, capacity, vector group, cooling method, impedance, and enclosure. We design transformers according to your project and grid requirements.
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What international standards do your transformers meet?Our transformers can be manufactured according to IEC, ANSI, IEEE, or other required standards. We also support third-party inspection and factory testing.
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What is your delivery time?Delivery time depends on transformer type and capacity. Standard models usually take 2–4 weeks, while customized transformers may require 4–8 weeks.
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Do you provide technical support and drawings?Yes. You receive technical drawings, parameter confirmation, and engineering support before production. Installation and after-sales support are also available.
Henan Jinma Electric Co., Ltd., operates a 50,000-square-meter modern manufacturing base in Henan Province that specializes in an integrated "one-stop" production model ranging from raw material selection to core component manufacturing.
