Oil-immersed Transformer Overview
Oil-immersed Transformer solutions from our Chinese manufacturer serve utilities, industrial plants, and infrastructure projects that demand reliable distribution. Founded in 2009 in Liushi Town, we integrate design, production, sales, and service to deliver utility-grade equipment. Explore related models in our complete transformers catalog.
Oil-immersed Transformer Features and Benefits
High-grade grain-oriented cores reduce no-load loss and noise. Robust windings and precise clamping improve short-circuit strength and mechanical stability. Hermetically sealed corrugated tanks limit moisture and oxidation, extending insulation life with lower maintenance. Cooling options include ONAN for natural air and ONAF for higher-duty operation. Safety and monitoring accessories—pressure relief valves, gas relays, signal thermometers, and oil level indicators—support dependable, safe service. Vacuum oil filling enhances insulation impregnation and reliability.
Oil-immersed Transformer Types and Options
| Type / Series | Typical Application | Sealing | Cooling | Voltage Regulation |
|---|
| S11 distribution transformer | Utility feeders, commercial loads | Hermetically sealed | ONAN / ONAF | Off-circuit taps |
| S13 distribution transformer | Energy-efficiency focused networks | Hermetically sealed | ONAN / ONAF | Off-circuit or OLTC |
| D11 single-phase transformer | Rail systems, localized supply | Sealed or conservator | ONAN / ONAF | Off-circuit taps |
| Model with OLTC | Fluctuating industrial or process loads | Sealed or conservator | ONAN / ONAF | Continuous regulation |
S11/S13 Oil-immersed Distribution Transformers
These series balance low loss, low noise, and compact footprints. Ratings, tap ranges, bushings, and accessories are configurable for urban, commercial, and industrial sites.
How to Select and Where to Use Oil-immersed Transformers
Define kVA based on peak, continuous load, and growth. Confirm voltage class (10/11/24 kV), LV output, and required tap range—off-circuit or OLTC. Match impedance to fault levels and protection coordination. Choose ONAN or ONAF, and select hermetically sealed or conservator designs for site conditions. Typical applications include utilities, plants, high-rise buildings, hospitals, transport hubs, and petrochemical facilities.
Standards, Testing, and After-sales for Oil-immersed Transformers
Units are designed and tested to relevant national and IEC standards, covering losses, impedance, insulation, impulse, temperature rise, and accessory function. We welcome technical exchanges, oversight, and factory test witnessing. Warranty is one year, with lifelong paid service and technical guidance. After-sales SLAs target reply within 1 hour and rapid on-site support based on distance.
Request a Quote from an Oil-immersed Transformer Manufacturer
Send your voltage class, kVA, tap range, cooling, sealing type, and site conditions for a tailored proposal. Our team provides technical consultation, drawings, and test documentation to streamline procurement. Contact our transformer manufacturer to discuss your oil-immersed distribution or power transformer project today.
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