500 kVA 34.5kV Three Phase Oil immersed Set Down Substation Transformer

This 500 kVA three-phase oil-immersed step-down substation transformer features a 34.5 kV delta-connected primary and a 480Y/277 V grounded wye-connected secondary, making it the ideal solution for large-scale power distribution in utility, industrial and commercial applications. It is built with a high-efficiency silicon steel core and mineral oil insulation, ensuring low losses and reliable thermal performance with a temperature rise of only 65°C. The oil-immersed design enhances durability and service life, maintaining stable operation even under heavy load conditions.

 

As a 500 kVA substation transformer, it comes with a weatherproof and tamper-resistant enclosure, making it perfectly suited for outdoor substation installations. It complies with global standards including ANSI, IEEE, UL, CSA and DOE, enabling safe and efficient step-down operation.

 

Read More: 600 kVA 33kV to 11kV Oil-Immersed Substation Transformer – Copper Windings

 

Technical Specifications of 500 kVA Substation Transformer

Engineered for high-efficiency power distribution, this 500 kVA substation transformer is configured with a 34.5 kV delta-connected primary and a 480Y/277 V grounded wye-connected secondary. This setup ensures reliable voltage step-down, positioning it as the optimal choice for large-scale industrial, utility and commercial power distribution systems. With its robust oil-immersed construction, the transformer minimizes energy losses and guarantees thermal stability (with a temperature rise of just 65°C), thus ensuring an extended service life and high-efficiency performance even in harsh operating environments.

 

Weight of 500 kVA Substation Transformer

This 500 kVA substation transformer has an approximate weight of x metric tons (specific weight subject to configuration and auxiliary components), and is engineered to handle heavy-duty power loads. Its substantial weight is a testament to its rugged structural quality and ability to withstand mechanical stress during transportation, installation and long-term operation, making it a reliable choice for substation and industrial applications.

 

Dimensions of 500 kVA Substation Transformer

The 500 kVA substation transformer features an optimized dimensional design that ensures efficient space utilization while maintaining superior operational performance. Its compact structure facilitates easy installation and integration into existing substations, and fully adheres to industry space and safety standards. The transformer can be customized to meet specific on-site requirements, ensuring seamless integration with your power distribution system.

 

Price of 500 kVA Substation Transformer

We offer the 500 kVA substation transformer at highly competitive prices without compromising on exceptional quality. Our factory-direct pricing model ensures a cost-effective solution for large-capacity power distribution needs. Prices vary based on specific configuration options, certifications and additional services. With our value-oriented pricing strategy, customers can acquire durable, high-efficiency transformers at affordable rates for both medium and large-scale projects.

 

Manufacturer of 500 kVA Substation Transformer

As a leading manufacturer of high-quality power transformers, GNEE produces 500 kVA substation transformers using advanced engineering and cutting-edge technology. Our manufacturing facility is located in China, equipped with modern production lines that meet global standards and hold ISO, UL and CE certifications. Rated for a primary voltage of 34.5 kV and a secondary voltage of 480Y/277 V, each transformer is precision-manufactured to deliver the highest level of quality and reliability in the most demanding power distribution systems.

 

Sales of 500 kVA Substation Transformer

This 500 kVA substation transformer is sold worldwide, serving various industries and utility companies across North America, South America, Europe and the Middle East. We adhere to a core philosophy of performance first, uncompromising reliability and customer satisfaction, ensuring every unit meets the highest safety and efficiency standards. Whether you are expanding power infrastructure or upgrading existing equipment, our transformer – with a 34.5 kV primary and 480Y/277 V secondary – is a robust and dependable choice.

 

Factory Wholesale of 500 kVA Substation Transformer

GNEE supplies the 500 kVA substation transformer directly from our factory, ensuring highly competitive wholesale prices for bulk orders. By cutting out middlemen, we pass on significant cost savings to our customers, delivering high-quality products at more affordable rates. Our factory-direct model guarantees a smooth and fast delivery process, making it the ideal choice for projects that prioritize cost-effectiveness and on-time delivery. Designed for a 34.5 kV primary voltage and 480Y/277 V secondary voltage, this transformer complies with international efficiency and safety standards.

 

Delivery of 500 kVA Substation Transformer to North America

With a comprehensive distribution network, GNEE ensures efficient delivery of 500 kVA substation transformers across North America. We provide streamlined logistics services, including safe international shipping and fast lead times, enabling our transformers to meet the industrial, commercial and utility needs of the United States, Canada and Mexico. Rated for 34.5 kV primary and 480Y/277 V secondary, the transformer ensures reliable and efficient power distribution in all installation environments, and complies with local standards and regulations for smooth customs clearance.

 

Cost-Effective Solution of 500 kVA Substation Transformer

Designed for large-scale power distribution, this 500 kVA substation transformer – with a 34.5 kV primary and 480Y/277 V secondary – delivers a highly cost-effective solution. Its high-efficiency design ensures reduced operational costs over its service life, minimizing energy losses and lowering maintenance expenses. Its rugged construction also guarantees minimal downtime, delivering long-term return on investment for industrial and utility applications. This cost-effectiveness, combined with its advanced technology, makes it the perfect choice for cost-conscious projects with high-performance requirements.

 

Performance Features of 500 kVA Substation Transformer

Our 500 kVA substation transformer delivers superior performance, featuring a high-efficiency silicon steel core that minimizes core losses and boosts energy efficiency. The oil-immersed design enhances heat dissipation, keeping the transformer running at low temperatures even under heavy loads. Mineral oil insulation ensures reliable dielectric strength for the transformer, improving electrical safety and reducing the risk of failures. Its robust construction and advanced cooling system guarantee stable operation at 34.5 kV primary and 480Y/277 V secondary voltages, making it a reliable choice for meeting global power distribution needs.

 

Learn More: Medium Voltage Substation Transformer – 33/11kV, 2.5MVA to 6.3MVA, Copper Windings, Oil-Immersed

 

Why Choose the 500 kVA 34.5kV Three-Phase Oil-Immersed Under-Mounted Substation Transformer?

GNEE's 500 kVA three-phase oil-immersed step-down substation transformer is a rugged, high-performance solution engineered for large-scale power distribution in industrial, commercial and utility sectors. Rated for a 34.5 kV primary voltage and 480Y/277 V secondary voltage, it is designed to meet high-power demands while delivering safe, efficient and reliable step-down operation.

 

Built to withstand harsh working conditions, the oil-immersed structure ensures reliable cooling and prevents overheating, guaranteeing an extended service life even under heavy loads. This transformer is the ideal choice for substations across North America, South America, Europe and other global markets, including the United States, Canada, Brazil, Argentina, Guyana, Spain, Portugal and the United Arab Emirates.

 

Key Advantages

✅ High power rating for large-scale applications

Rated at 500 kVA with a 34.5 kV primary voltage, the transformer is capable of meeting the high-power demands of substations, utility grids and high-demand industrial environments.

 

✅ Oil-immersed design for superior heat dissipation

The oil-immersed construction uses mineral oil for highly efficient cooling, achieving optimal thermal management and extending the transformer's service life. This design makes it the ideal choice for high power density and harsh operating environments.

 

✅ Energy-efficient and cost-effective performance

Featuring a low-loss silicon steel core and premium copper windings, the 500 kVA transformer complies with global standards including ANSI, IEEE, UL, CSA and CE, ensuring energy efficiency, minimized operational costs and reduced environmental impact.

 

✅ Rugged and reliable for harsh environments

Manufactured at GNEE's advanced facility in China, this 500 kVA transformer is built to be robust and reliable, capable of withstanding harsh environments. Its weatherproof design and tamper-resistant features ensure safe and reliable long-term operation even in severe conditions.

 

✅ Flexible voltage configurations and customization options

We offer a range of customization options to tailor the transformer to your specific project needs, from adjusting primary and secondary voltages to adding accessories such as surge arresters and fuses. It can be perfectly matched to regional voltage standards and unique grid requirements.

 

✅ Fast delivery and global distribution

GNEE's large-scale production capacity ensures fast delivery even for custom models. Our global logistics network guarantees reliable product delivery to North America, South America, Europe, Asia and beyond.

 

✅ Factory-direct pricing with significant cost advantages

Our 500 kVA transformers are fully manufactured in-house and supplied at highly competitive factory-direct prices, delivering the best cost-performance ratio without compromising on quality. Every process, from core production to final assembly, is strictly monitored for excellence.

 

Whether you are planning a utility grid upgrade, an industrial power solution or a large-scale infrastructure project, GNEE's 500 kVA three-phase oil-immersed under-mounted substation transformer is the ideal choice for efficient, cost-effective and reliable power distribution.

 

📩 Contact us now for a custom quote or expert consultation tailored to your voltage and project requirements.

Request A Quote

 

500 KVA Substation Transformer Technical Specs

No.	Item	Specification	Remark
1	Product Type	Oil-Immersed Step-Down Substation Transformer	-
2	Rated Capacity	500 kVA	1000 KVA-20000 KVA or customizable
3	Phase Number	Three Phase	-
4	Rated Frequency	60 Hz (optional 50 Hz)	-
5	Primary Voltage (HV)	34.5 kV	6-35KV or customizable
6	Secondary Voltage (LV)	4160 V / 480 V / 240 V / Customized	Other voltages customizable
7	HV Connection	Delta (Δ)	Customizable
8	LV Connection	Wye (Y)	With grounded neutral
9	Vector Group	Dyn11 (customizable)	-
10	Tap Changer	±5% with 2.5% per step	Off-load or on-load tap changer option
11	No-load Loss	Approx. 4.2 kW	Subject to final design
12	Load Loss (at 75°C)	Approx. 36 kW	Subject to final design
13	Short-Circuit Impedance	6% ±10%	Adjustable upon request
14	Insulation Level (HV Side)	BIL 150 kV	Power frequency withstand 70kV
15	Insulation Level (LV Side)	BIL 30 kV	Power frequency withstand 10kV
16	Insulation Class	Class A or Class B	Optional
17	Maximum Temperature Rise	65°C (standard) / 55°C (low loss type)	Relative to ambient temperature
18	Design Altitude	≤1000 meters	Derating required above 1000m
19	Ambient Temperature Range	-40°C ~ +50°C	Special design available
20	Cooling Method	ONAN (Oil Natural Air Natural)	ONAF available (forced cooling)
21	Short-circuit Duration	2 seconds	-
22	Noise Level	≤60 dB (at 1 meter)	According to NEMA TR1 or IEC 60076
23	Core Type	Step-lap laminated core	High-quality cold-rolled silicon steel
24	Winding Material	Copper (standard) or Aluminum (optional)	-
25	Tank Type	Fully sealed steel tank	Conservator tank optional
26	Oil Type	Mineral Oil (IEC 60296)	Eco-friendly oil optional
27	Protection Class	IP00 (standard), IP23 (optional)	For indoor or outdoor applications
28	Surface Treatment	Sandblasting + Primer + Topcoat painting	Anti-corrosion for harsh environments
29	Standard Accessories	Pressure relief valve, oil level gauge, thermometer, drain valve, grounding terminals	Standard configuration
30	Protection Devices	Buchholz relay (optional), pressure relief, temperature alarms	Customizable
31	Monitoring Function (Optional)	IoT smart monitoring module (temperature, humidity, load, etc.)	Smart transformer option
32	Termination Type	Cable box or porcelain bushings	Customizable
33	Cooling Radiators	Bolted or welded type	-
34	Standards	IEC 60076 / ANSI C57 / IEEE C57 / CSA C88 / GOST Certification	Customized as per request
35	Routine Tests	Routine, Type, and Special Tests	100% full inspection before shipment
36	Certification	CE / UL / CSA / CUL / GOST	Based on market demand
37	Overall Dimension (approx.)	2500mm × 1600mm × 2000mm	Subject to final drawings
38	Total Weight (incl. oil, approx.)	9500 kg	-