Oil Immersed Transformer

Premium Oil Immersed Transformers for Reliable Power Distribution

As a leading high-tech electrical manufacturer established in 2014, ZISHENG specializes in the engineering, production, and testing of high-performance oil immersed transformers. Designed to handle heavy electrical loads and withstand challenging environmental conditions, our oil-filled transformers offer superior dielectric strength and exceptional heat dissipation. Whether you are upgrading an urban substation or powering a heavy-duty mining operation, our equipment ensures seamless voltage transformation, minimal energy loss, and maximum operational safety.

Core Components and Manufacturing Excellence

The reliability of a power transformer lies in its materials and construction. At ZISHENG, we integrate advanced manufacturing technologies with premium raw materials to deliver industrial-grade performance. Our production strictly adheres to ISO 9001 quality management standards.

• High-Permeability Magnetic Cores: We utilize top-grade cold-rolled grain-oriented silicon steel sheets. The core is precisely cut and stacked to significantly reduce no-load losses, minimize noise levels, and improve overall energy efficiency.
• Robust Windings: Available in high-purity copper or high-quality aluminum, our windings are expertly engineered to withstand short-circuit forces. The optimized winding structure ensures uniform heat distribution and prevents localized overheating.
• Durable Corrugated Tanks: Our fully sealed transformer tanks are fabricated from heavy-duty steel and treated with advanced anti-corrosion coatings. The corrugated design naturally accommodates oil volume expansion during temperature fluctuations, eliminating the need for an oil conservator in many models.
• Premium Insulating Oil: We use high-grade mineral oil with excellent dielectric properties and thermal conductivity, ensuring long-lasting insulation and effective cooling for the internal components.

Key Advantages of ZISHENG Oil-Filled Transformers

Investing in ZISHENG’s electrical equipment brings long-term value to your power infrastructure. With 21 utility model patents and 3 software copyrights, our R&D team continuously innovates to provide products that outlast the competition.

• Exceptional Cooling & Overload Capacity: The ONAN (Oil Natural Air Natural) and ONAF (Oil Natural Air Forced) cooling methods effectively manage core and winding temperatures, allowing the transformer to handle temporary overloads safely.
• Low Maintenance & Long Lifespan: The hermetically sealed tank design protects the insulating oil from moisture and oxygen degradation, significantly reducing routine maintenance costs and extending the service life.
• Eco-Friendly & Low Noise: Optimized core geometries and strict assembly tolerances result in ultra-low vibration and noise, making our transformers ideal for residential and commercial environments.

Comprehensive Industry Applications

With a track record of serving over 200 satisfied clients globally, our oil immersed transformers are the backbone of diverse industrial and commercial power systems. We provide tailored solutions for:

• Utility & Power Grids: Upgrading primary and secondary distribution networks for municipalities and rural electrification projects.
• Mining & Heavy Metallurgy: Delivering robust, explosion-proof, and dust-resistant power solutions for harsh mining environments and steel mills.
• Renewable Energy Integration: Highly efficient step-up transformers designed for the variable power output of solar photovoltaic (PV) farms and wind turbine generators.
• Infrastructure & Transportation: Reliable continuous power for railway networks, telecommunication data centers, and large-scale real estate developments.

Technical Specifications & OEM/ODM Customization

As a verified supplier under the Chinese State Administration for Market Regulation and an approved capability vendor for the State Grid, ZISHENG offers extensive OEM and ODM customization. We design products according to international standards (IEC, IEEE/ANSI) tailored to your specific grid requirements.

Strict Quality Control and Factory Testing

Quality is the foundation of ZISHENG. Every single oil immersed transformer undergoes rigorous testing in our advanced in-house laboratory before shipment. Operating under ISO 45001 occupational health and safety systems, our testing protocols include:

• Measurement of winding resistance and voltage ratio.
• Impedance voltage and load loss testing.
• No-load loss and no-load current measurement.
• Dielectric routine tests (Applied voltage and induced overvoltage withstand tests).
• Insulation resistance and oil breakdown voltage tests.

Frequently Asked Questions (FAQs)

Q: How do you handle OEM/ODM orders for oil immersed transformers?

A: Our OEM/ODM process is highly collaborative. You provide your technical specifications, single-line diagrams, or footprint constraints. Our engineering team will draft 2D/3D CAD drawings and technical proposals for your approval before moving into the ISO-certified manufacturing phase.

Q: What is the typical lead time for a custom transformer?

A: Lead times vary based on capacity, voltage class, and order quantity. Standard distribution transformers typically take 2-4 weeks, while large custom power transformers may require 5-8 weeks. We always provide a clear production schedule upon order confirmation.

Q: Can your transformers operate in extreme environments?

A: Yes. We can customize the tank coating, oil type, and insulation materials to ensure optimal performance in extreme high/low temperatures, high altitudes, or highly corrosive industrial environments.

Q: Do you provide after-sales technical support?

A: Absolutely. ZISHENG believes in long-term partnerships based on stable quality and good service. We offer comprehensive technical documentation, installation guidance, and responsive remote troubleshooting for all our global clients.

Partner With a Trusted Transformer Manufacturer

Do not compromise on your power distribution infrastructure. Partner with a factory that combines advanced technology, stable quality, and flexible cooperation mechanisms. Send us your project details today, and our technical sales team will provide a highly competitive quote and custom engineering solution.

Contact ZISHENG Today:
Email: info@bdzstransformer.com
Phone: +86-191-3128-5373
WhatsApp: Message us on WhatsApp
Factory Location: No. 6799 North Third Ring Road, Jingxiu District, Baoding, Hebei, China