In the field of power transmission and distribution, ZishengELECTRIC 300kVA oil-immersed transformer stands out with its excellent performance, providing reliable power support for various power consumption scenarios. The transformer is carefully wound with high-quality silicon steel sheets and electromagnetic wires, with extremely low no-load loss and load loss, which greatly improves the efficiency of power conversion and effectively reduces electricity costs. It is widely used in industrial plants, commercial centers, residential communities, infrastructure construction, and other fields to meet the power needs of different scenarios.
The 300kVA Oil Immersed Distribution Transformer is engineered to provide safe, efficient, and reliable power distribution for utility networks, industrial facilities, commercial buildings, renewable energy projects, and infrastructure applications. It is designed to step down medium voltage to low voltage with high efficiency while ensuring stable performance under continuous operating conditions.
Manufactured using high-permeability cold-rolled grain-oriented (CRGO) silicon steel cores and high-conductivity copper or aluminum windings, the transformer minimizes no-load and load losses while improving overall energy efficiency. The windings are vacuum dried and insulated to ensure excellent dielectric strength and long-term reliability.
The transformer adopts an ONAN (Oil Natural Air Natural) cooling system. High-quality insulating mineral oil provides effective cooling and electrical insulation, allowing the transformer to operate safely under varying load conditions and ambient temperatures. The corrugated or radiator-type tank design enhances heat dissipation while maintaining a compact and maintenance-friendly structure.
Designed in accordance with IEC 60076, ANSI, IEEE, or other international standards, the 300kVA transformer can be customized to suit different grid requirements. Multiple primary and secondary voltage combinations, vector groups, tap changer options, and accessories are available to meet project specifications across global markets.
Each transformer undergoes comprehensive factory testing, including ratio, insulation resistance, winding resistance, impedance, no-load loss, load loss, applied voltage, induced voltage, and leak tests before shipment, ensuring consistent quality and reliable field performance.
With its robust construction, low operating costs, and long service life, the 300kVA Oil Immersed Distribution Transformer is an ideal solution for power distribution systems in residential developments, industrial plants, commercial complexes, substations, mining operations, and solar or wind power projects.
Zisheng are a professional 19+ years manufacturer in producing Oil-Immersed Transformers, Compact Substation, Pad Mounted Transformers, Pole Mounted Transformers and Dry Type Transformers. We own the certificates of ISO/CE/IEC 60076 and TUV Rheinland.
Transformers undergo rigorous FAT and type testing, support voltage/capacity customization. Welcome to consult for Catalog and Product. you can contact us at email [email protected].
| Rated Power | 300 kVA | |
| Rating Primary Voltage | 2.4 – 34.5kV | |
| Secondary Voltage | 480/277V 400/230V 380/220V Customized |
|
| Frequency | 50/60Hz | |
| Vector Group | Dyn11, Yyn0, Dyn5 | |
| Winding Material | Aluminum/Copper | |
| Efficiency | As IEEE, Doe 2016, CAS Std or Customized | |
| Impedance Voltage | Nominal 2% or Customized 1.1 – 5.75% | |
| Altitude | ≤1,000m or Customized | |
| Color | ANSI 70 Light gray/Munsell 7GY3.29/1.5 or customized, etc | |
| Tank material | Mild Steel, 304 Stainless Steel | |
| Insulating Oil Weight | 430 kg | |
| Total Weight | 1650 kg | |
| Outline Dimensions（L×W×H）in. | 1700 × 1250 × 1800（mm) | |
| HV Bushing |
| LV Bushing |
| Tap changer |
| Oil level gauge |
| Oil temperature indicator |
| Pressure relief device |
| Pressure vacuum gauge |
| Lifting hook for complete transformer |
| Name plate |
| Radiators |
| Oil upper filtering valve |
| Oil drain valve with 3/8″ sampler |
The 300kVA Oil Immersed Distribution Transformer is widely used in medium- and low-voltage power distribution systems, providing stable and efficient power for a variety of industries and infrastructure projects.
A 300kVA oil immersed transformer is commonly used in utility distribution networks, industrial plants, commercial buildings, renewable energy projects, mining sites, and infrastructure developments to step down medium voltage to low voltage for power distribution.
Standard primary voltages include 6kV, 10kV, 11kV, 13.8kV, 15kV, 20kV, 22kV, and 33kV, with secondary voltages such as 400V, 415V, 433V, or 480V. Custom voltage combinations are also available.
The transformer uses the ONAN (Oil Natural Air Natural) cooling method, providing efficient heat dissipation and reliable performance for continuous operation.
Yes. We offer customization for voltage ratings, vector groups, tap changers, winding material (copper or aluminum), enclosure design, accessories, and international standards to meet specific project requirements.
Our 300kVA oil immersed transformers can be manufactured in accordance with IEC 60076, ANSI, IEEE, and other applicable international standards, depending on customer requirements.
Each transformer undergoes comprehensive routine factory testing, including:
With proper installation and regular maintenance, a 300kVA oil immersed transformer typically has a service life of 25–30 years or longer, depending on operating conditions.
Yes. We provide OEM & ODM manufacturing, technical support, factory testing, export documentation, and worldwide shipping for utility, EPC, and industrial customers.
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