1500 kVA 11kV to 400V Oil Filled Three Phase Distribution Transformer | IEC & ANSI Standards

Features of 1500 kVA 11kV to 400V Oil-Immersed Distribution Transformer

 

This 1500 kVA 11kV to 400V oil-immersed three-phase distribution transformer is a robust and high-efficiency power distribution solution, engineered specifically for medium-voltage power grids and commercial or industrial electrical systems. With a rated capacity of 1500 kVA, it features a 11kV delta connection on the primary side and a 400V star-grounded connection on the secondary side, ensuring stable voltage conversion, outstanding performance and a long service life. Manufactured with high-quality copper windings, low-loss grain-oriented silicon steel sheets and premium mineral insulating oil, the transformer delivers high energy efficiency, low losses and excellent heat dissipation for both 50Hz and 60Hz power systems.

 

Designed and produced by GNEE at its advanced manufacturing facilities, this distribution transformer complies with IEC, ANSI, IEEE, CE, UL, CSA and GOST quality and safety standards. Its sealed tank structure is built to withstand harsh outdoor conditions and is equipped with critical safety features including a Buchholz relay, pressure relief device, oil temperature indicator and liquid level gauge. Its compact and rugged enclosure makes it the ideal choice for urban substations, manufacturing plants, renewable energy grids and municipal power systems.

 

As a leading Chinese transformer manufacturer and global supplier, GNEE offers OEM services, comprehensive factory routine testing and highly competitive wholesale prices for oil-immersed distribution transformers. Our 1500 kVA 11kV/0.4kV transformers have been successfully commissioned in the United States, Canada, Mexico, Brazil, Argentina, Chile, Bolivia, Colombia, Spain and other countries and regions, complying with local electrical standards and power requirements. With short production cycles, ample inventory and reliable technical support, GNEE is committed to providing efficient and cost-effective medium-voltage power distribution solutions for customers in North America, South America and Spanish-speaking markets.

 

 

Learn More: 750 kVA Distribution Transformer from Certified Manufacturer | 13.2 kV to 208Y/120 V Three-Phase Power

 

Are you looking for a durable, high-efficiency 1500 kVA oil-immersed transformer for reliable medium-voltage power distribution?

GNEE's 11kV to 400V three-phase distribution transformer is engineered to handle critical loads in industrial, utility and commercial applications across North America, South America and global markets.

 

✅ What is a 1500 kVA Oil-Immersed Transformer Used for?

A 1500 kVA transformer steps down voltage from 11kV (medium voltage) to 400V (low voltage) to ensure the safe and efficient operation of precision equipment, lighting systems, HVAC systems, data centers and other devices. It is typically applied in:

• Urban substations and distribution networks
• Manufacturing and mining facilities
• Hospitals, universities and airports
• Renewable energy grid connection points (solar/wind)
• Data centers and export processing zones

 

Learn More: Transformers in Data Centers: Applications, Advantages and Selection Criteria

 

✅ Key Electrical Specifications of 1500 kVA Distribution Transformer

 

Rated Power: 1500 kVA (1.5 MVA)

Primary Voltage: 11 kV (Delta Connection)

Secondary Voltage: 400V / 230V (Star-Grounded)

Frequency: 50/60 Hz Dual Compatible

Cooling Method: ONAN (Oil Natural Air Natural)

Impedance Voltage: Approx. 6%

Tap Changer: ±2 x 2.5% Off-Circuit Tap Changer

Connection: Dyn11 Vector Group

Insulation Material: Mineral Oil, Compliant with IEC/IEEE Standards

Standards: IEC 60076, ANSI C57, IEEE, UL, CSA, CE, GOST

 

✅ Rated and Full-Load Current of 1500 kVA Transformer

Primary Current (11kV side): ≈ 78.7 A

Secondary Current (400V side): ≈ 2165 A

Engineered to safely handle high currents while minimizing heat generation and energy losses.

 

✅ Load Capacity of 1500 kVA Transformer

This transformer delivers a current of 1500 kVA, making it ideal for medium-sized commercial and industrial loads. At a power factor of 0.8, it can support approximately 1200 kW of active power, ensuring stability during peak demand periods.

 

✅ Dimensions and Specifications of 1500 kVA Transformer

Typical Dimensions: Approx. 2300 mm (L) × 1700 mm (W) × 2200 mm (H)

Design Options: Compact pad-mounted, base-mounted or indoor/outdoor enclosures;Custom dimensions available to fit substation layouts or roof installations.

 

✅ Weight of 1500 kVA Transformer

Approx. Weight (Including Oil): 2500 kg – 3200 kg

Heavier units offer higher mechanical strength, fault tolerance and cooling performance.

 

✅ Oil Capacity of 1500 kVA Transformer

Oil Volume: Approx. 500-650 Litres of Mineral Insulating Oil

Low-viscosity oil features high dielectric strength and excellent thermal conductivity.

 

Learn More: 500 kVA 11kV/0.4kV Oil-Immersed Medium-Voltage Distribution Transformer

 

✅ Heat Dissipation and Cooling Performance

Adopting a corrugated radiator design with natural air convection and oil circulation (ONAN), it ensures:

Low temperature rise (≤ 65°C standard)

Improved energy efficiency and extended service life

Optional forced air cooling unit for harsh environments

 

✅ Installation Solutions for 1500 kVA Oil-Immersed Transformer

Pre-filled and hermetically sealed for quick commissioning

Equipped with lifting lugs, skid bases or casters

Supports floor-mounted or compact substation integration

Detailed installation and grounding guidelines available upon request

 

✅ Standard Protection Features

Pressure relief device

Oil level indicator

Thermometer

Optional: Buchholz relay, surge protector, drain valve

Enclosure Surface Treatment: UV-resistant epoxy resin, optional IP54/IP65 protection class

 

✅ Certifications and Compliance

This product manufactured by GNEE complies with a number of global standards:

IEC 60076

ANSI C57 / IEEE

UL Certified / CSA Certified

CE/GOST/SGS Certified

Compliant with US DOE 2016 Standards and NEMA TP1 Energy Efficiency Standards

 

✅ 1500 kVA Transformer In Stock – Factory Direct Sales

GNEE offers highly competitive pricing, OEM services and bulk export support. Contact us for details on:

Wholesale prices for contractors and developers

Private label and custom branding

Bilingual technical support (English, Spanish, Chinese)

Free dimension and configuration consulting

 

Learn More: 1000 kVA 13.8 kV to 208Y/120 V Three-Phase Oil-Immersed Distribution Transformer

 

👉 Contact GNEE now for pricing, drawings or a fast custom quote tailored to your voltage and site requirements.

Request A Quote

 

1500 kVA 11kV to 400V Oil Filled Distribution Technical Specs

No.	Item	Specification	Description
1	Rated Capacity	1500 kVA	Ideal for mid-range distribution in commercial and utility systems
2	Input Voltage	11 kV (Delta)	Compatible with 11 kV grids; alternate voltages: 13.2 kV, 15 kV, 24.9 kV available
3	Output Voltage	400Y/230 V	Standard for industrial and municipal systems; 480Y/277 V optional
4	Phase Configuration	3-phase, 60 Hz	Designed for North and South American grid frequency
5	Cooling System	ONAN (self-cooled)	Quiet and low-maintenance, air-natural cooling without fans
6	Magnetic Core	CRGO silicon steel	Grain-oriented core steel for low no-load losses and high efficiency
7	Insulating Fluid	Mineral-based transformer oil	Thermally stable, high-dielectric oil per IEEE/ASTM D3487
8	Temperature Rise	Max 65°C	Energy-efficient options available at 55°C rise
9	Enclosure Type	Outdoor, weatherproof	NEMA 3R compliant; pad-mounted or custom housings optional
10	Standards Compliance	IEC 60076, ANSI C57, IEEE, UL	Fully certified for international applications
11	Certification	CE, UL, cUL, CSA, DOE, SGS	Certified for US, Canada, Latin America, and EU markets
12	Winding Configuration	Delta primary – Grounded Wye secondary	Alternate options: Wye-Wye, Delta-Delta available
13	Application Areas	Utility substations, commercial centers, infrastructure projects	Also used in schools, hospitals, data centers, renewable energy
14	Safety Devices	Oil level gauge, temperature meter, pressure release valve	Optional: surge arresters, Buchholz relay, drain valve
15	Approx. Dimensions	Based on design and fittings	Typical shipping weight: 1.8–2.3 tons
16	Energy Efficiency	Meets or exceeds DOE 2016	Reduced energy loss and improved long-term savings
17	Mounting & Handling	Steel skid base with lifting hooks	Suitable for crane, forklift, or trailer transport
18	Working Temperature Range	-30°C to +50°C	Cold weather designs available down to -45°C
19	Full Load Losses	~1.6% of rated capacity	Designed for optimal load operation
20	No-Load Losses	≤ 0.35%	Helps reduce idle power consumption
21	Load Losses	≤ 1.25%	Copper windings ensure consistent load response
22	Impedance	5.75% (±10%)	Customizable based on system impedance requirement
23	Short-Circuit Tolerance	Up to 25 kA for 2 sec	Mechanically reinforced for fault durability
24	Insulation Class	Class A (105°C)	Optional upgrade: Class B or F for thermal performance
25	Winding Conductor	Copper standard; aluminum optional	Copper preferred for improved conductivity and longevity
26	Tap Changer	±2 × 2.5% manual OCTC	Optional: OLTC for voltage regulation under load
27	Bushing Type	ANSI porcelain bushings	Polymeric bushings available for corrosive areas
28	Oil Quantity	Approx. 520 Liters	May vary by design and tank type
29	Expected Service Life	25–30 years	Engineered for long life with minimal maintenance
30	Noise Emission	≤ 58 dB at 1 meter	Suitable for urban or sound-sensitive environments
31	Standard Warranty	2–3 years	Extended warranty available upon request
32	Delivery Time (Standard Units)	30–45 days	Reliable production and shipping for global delivery
33	Lead Time (Custom Designs)	60–75 days	Accelerated timeline compared to industry average
34	Pricing	Contact for quotation	Price based on materials, specifications, certifications
35	Manufacturing Origin	Energy Transformer (China)	Certified manufacturer with global export experience