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

1500 kVA 11kV to 400V Oil Filled Distribution Transformer Features

The 1500 kVA 11kV to 400V Oil-Filled Three-Phase Distribution Transformer is a robust and efficient power distribution solution designed for medium voltage networks and commercial or industrial power systems. Featuring a 1500 kVA rated capacity, an 11kV Delta-connected primary, and a 400V grounded Wye secondary, this transformer ensures stable voltage conversion, optimal performance, and long operational life. Built with high-grade copper windings, low-loss grain-oriented silicon steel cores, and high-quality mineral insulating oil, this unit delivers high energy efficiency, minimal losses, and excellent thermal management for both 50Hz and 60Hz power systems.

Engineered and manufactured in Energy Transformer’s state-of-the-art production facility, this distribution transformer complies with IEC, ANSI, IEEE, and GOST quality and safety standards. The sealed tank construction is designed to withstand harsh outdoor conditions, with key safety features including Buchholz relay, pressure relief device, oil temperature indicators, and liquid level gauges. Its compact and rugged housing makes it ideal for deployment in urban substations, manufacturing plants, renewable energy grids, and municipal power systems.

As a top-tier Chinese transformer manufacturer and global supplier, Energy Transformer offers OEM services, full routine factory testing, and competitive wholesale pricing for all oil-filled distribution transformers. Our 1500 kVA 11kV/0.4kV transformers are already in successful operation across the United States, Canada, Mexico, Brazil, Argentina, Chile, Bolivia, Colombia, and Spain, aligning with local electrical standards and utility needs. With short production cycles, extensive inventory, and reliable technical support, Energy Transformer ensures efficient and cost-effective medium voltage power distribution solutions for clients across North America, South America, and Spanish-speaking markets.

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

Looking for a durable, high-efficiency 1500 kVA oil-filled transformer for reliable medium voltage distribution? ENERGY TRANSFORMER’s 11kV to 400V three-phase distribution transformer is engineered to handle critical loads in industrial, utility, and commercial applications throughout North America, South America, and global markets.

✅ What Is a 1500 kVA Oil-Filled Transformer Used For?

The 1500 kVA transformer steps voltage down from 11kV (medium voltage) to 400V (low voltage) to support the safe and efficient operation of sensitive equipment, lighting systems, HVAC, data centers, and more. It is commonly deployed in:

• Urban substations and distribution grids

• Manufacturing and mining facilities

• Hospitals, universities, airports

• Renewable energy integration sites (solar/wind)

• Data centers and export processing zones

✅ Key Electrical Specifications of the 1500 kVA Distribution Transformer

• Power Rating: 1500 kVA (1.5 MVA)

• Primary Voltage: 11 kV (Delta)

• Secondary Voltage: 400V / 230V (Grounded Wye)

• Frequency: 50/60 Hz dual compatible

• Cooling Type: ONAN (Oil Natural Air Natural)

• Impedance Voltage: ~6%

• Tap Changer: ±2 x 2.5% Off-circuit tap changer

• Connection: Dyn11 vector group

• Insulation: Mineral oil, IEC/IEEE compliant

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

✅ 1500 kVA Transformer Current Rating & Full Load Amps

• Primary Current (11kV side) ≈ 78.7 A

• Secondary Current (400V side) ≈ 2165 A
  Designed to safely handle heavy current flow while minimizing heat generation and loss.

✅ 1500 kVA Transformer Load Capacity

The transformer delivers 1500 kilovolt-amperes, ideal for medium-sized commercial and industrial loads. This supports approximately 1200 kW of real power at 0.8 power factor, ensuring stability during peak demand.

✅ 1500 kVA Transformer Dimensions & Size

• Typical Size: ~2300 mm (L) × 1700 mm (W) × 2200 mm (H)

• Design Options: Compact pad-mounted, plinth-mounted, or indoor/outdoor enclosure
  Custom dimensions available to suit substation layouts or rooftop installations.

✅ 1500 kVA Transformer Weight

• Approximate Weight (Oil Included): 2500 kg – 3200 kg
  Heavier units offer enhanced mechanical strength, fault tolerance, and cooling performance.

✅ 1500 kVA Transformer Oil Capacity

• Oil Volume: ~500–650 Liters of mineral insulating oil
  Low viscosity oil provides high dielectric strength and excellent thermal conduction.

✅ Heat Dissipation & Cooling Performance

Engineered with corrugated radiators for natural air convection and oil circulation (ONAN), ensuring:

• Low temperature rise (≤ 65°C standard)

• Enhanced energy efficiency and extended lifespan

• Optional forced-air cooling for harsh environments

✅ Installation Options for the 1500 kVA Oil-Immersed Transformer

• Delivered pre-filled and sealed for fast commissioning

• Equipped with lifting lugs, skid base, or wheels

• Supports pad-mount or compact substation integration

• Detailed installation and grounding guide available upon request

✅ Standard Protection Features

• Pressure relief device

• Oil level indicator

• Thermometer

• Optional: Buchholz relay, surge arrester, drain valve

• Enclosure finish: UV-resistant epoxy, optional IP54/IP65

✅ Certifications & Compliance

ENERGY TRANSFORMER manufactures this model to conform with multiple global standards:

• IEC 60076

• ANSI C57 / IEEE

• UL listed / CSA certified

• CE / GOST / SGS tested

• DOE 2016 & NEMA TP1 efficiency compliant

✅ Applications in North & South America

The 1500 kVA 11kV/400V transformer is widely installed in:

• The United States, Canada, and Mexico

• Brazil, Argentina, Chile, Peru, Colombia

• Panama, Bolivia, Paraguay
  Available with GOST certification for CIS regions and UL/CSA listing for North American markets.

✅ Lead Time & Availability

• Standard lead time: 30–45 days

• Custom builds: 60–75 days

• Available FOB or CIF from China to major ports in Houston, Los Angeles, Veracruz, Callao, Buenos Aires, and more.

✅ 1500 kVA Transformer for Sale – Factory Direct

ENERGY TRANSFORMER offers competitive pricing, OEM services, and bulk export support. Contact us for:

• Wholesale rates for contractors and developers

• Private labeling and custom branding

• Bilingual tech support (English, Spanish, Chinese)

• Free consultation on sizing and configuration

✅ Similar Models to Explore

• 1250 kVA 11/0.4 kV Oil Transformer – Compact design

• 2000 kVA 13.8/0.48 kV Transformer – Ideal for U.S. grid

• 1500 kVA Dry-Type Transformer – Fire-resistant indoor use

Why Choose the 1500 kVA 11kV to 400V Oil-Filled Three-Phase Distribution Transformer?

The 1500 kVA oil-filled distribution transformer from ENERGY TRANSFORMER is designed for stable and efficient medium-to-low voltage conversion—perfect for industrial parks, commercial buildings, and utility networks. With a voltage ratio of 11kV to 400V, this three-phase unit is widely used in systems across the U.S., Canada, Brazil, Argentina, Chile, and other international markets.

Built with high-grade copper windings, sealed ONAN oil insulation, and Dyn11 configuration, this transformer ensures reliable energy distribution with minimal losses. Fully compliant with IEC 60076, ANSI C57, UL, and CSA standards, it meets the performance and safety demands of global projects.

Key Benefits:

✅ Robust Performance
Handles high current loads with excellent thermal dissipation—ideal for powering lighting, HVAC, pumps, and machinery.

✅ Weather-Resistant & Durable
Rugged tank construction, anti-corrosion coating, and sealed radiators support long-term outdoor or substation use.

✅ Customizable Design
Includes ±2×2.5% off-circuit tap changer, options for cable box or bushing connections, and tailored footprint for compact installations.

✅ Quiet & Efficient
Low core losses and sound-reducing design make it suitable for both industrial and semi-residential zones.

✅ Tested & Certified Worldwide
Manufactured under ISO, UL, CE, and GOST systems with full type/routine tests and third-party inspection available.

From commercial districts in Chile to grid upgrades in Canada, the 1500 kVA 11kV/400V oil-filled transformer ensures long-lasting, code-compliant power performance.

👉 Contact ENERGY TRANSFORMER today for pricing, drawings, or a fast quote tailored to your voltage and site needs.