1500KVA 11KV Oil Filled Distribution Transformer
Rated Capacity: 1500kVA
Voltage: 11kV / 0.4kV
Cooling Mode: Oil Natural Air Natural (ONAN)
Vector Group: Dyn11
Winding: Copper Winding
Description
Technical Parameters
Henan GNEE Electric Co., Ltd. is one of the leading manufacturers and suppliers of 1500kva 11kv oil filled distribution transformer in China, also supports customized service with low price. Welcome to buy discount 1500kva 11kv oil filled distribution transformer for sale here from our factory. If you have any enquiry about pricelist, please feel free to email us.
The 1500kVA Three Phase Oil Immersed Transformer is engineered for medium-duty heavy-load applications, featuring 11kV high-voltage input and 0.4kV low-voltage output. Adopting a low-loss design, it complies with the most stringent power grid and industrial operation requirements. Equipped with a fully sealed oil tank and delivering excellent heat dissipation and insulation performance, it serves as a premium solution for substation upgrading, new energy grid connection and factory power distribution.
General Introduction of 1500kVA Three Phase Oil Immersed Transformer
The 1500kVA Oil Filled Transformer adopts high-quality mineral oil as insulation and cooling medium, featuring strong overload capacity and outstanding weather resistance. It conforms to IEC 60076 and GB 1094 standards, suitable for both outdoor and indoor installation. This oil-immersed transformer can operate stably for a long time at the rated frequency of 50Hz/60Hz. Its no-load loss and load loss exceed Level 3 energy efficiency standards, effectively reducing the full life-cycle operation cost.
- Up to 98.5% operating efficiency
- 6% short-circuit impedance
- Optional Class A / Class F insulation grade
Working Principle of 1500kVA Oil Filled Transformer
Law of Electromagnetic Induction
Based on Faraday's law of electromagnetic induction, alternating magnetic flux is generated when the primary winding is connected to 11kV AC power supply. The closed iron core couples the magnetic flux to the secondary winding, and the voltage is converted through the turn ratio. The 1500kVA rated capacity ensures efficient power transmission under rated load conditions.
Oil-Immersed Insulation & Cooling
Transformer oil acts as an insulating medium to enhance dielectric strength between windings. Meanwhile, it transfers heat generated by the iron core and windings to the tank wall or heat sinks through natural convection, realizing ONAN natural oil circulation cooling and keeping temperature rise within standard limits.
Voltage Regulation & Protection
The high-voltage side is fitted with ±2×2.5% off-circuit tap changer to adapt to power grid voltage fluctuations. Complete protection components including gas relay and pressure relief valve ensure the safe and stable operation of the transformer.
Structural Composition of 1500kVA Oil Immersed Transformer
Iron Core: High-permeability cold-rolled silicon steel sheet with stepped lap joint technology, reducing no-load current and hysteresis loss
Winding: Full copper conductor made of high-purity oxygen-free copper, lowering resistance loss and enhancing short-circuit resistance
Insulating Oil: Premium naphthenic mineral oil with high flash point and superior oxidation stability
Oil Tank & Radiator: Corrugated oil tank or plate radiator with fully sealed structure to prevent oil deterioration
Bushing & Tap Changer: High/low voltage porcelain bushing or composite bushing; off-circuit tap changer for precise voltage regulation
Protection Components: Oil level gauge, thermometer, pressure relief valve, optional gas relay
Application Scenarios for 1500kVA Transformer
The 1500kVA Three Phase Oil Immersed Transformer is designed to support medium-to-large industrial loads. However, the actual usable load (kW) depends on the power factor and load characteristics.
✅Typical Load Capacity Conversion
| Power Factor | Maximum Load (kW) | Recommended Safe Load (kW) |
|---|---|---|
| 0.8 | 1200 kW | 1000 – 1150 kW |
| 0.85 | 1275 kW | 1050 – 1200 kW |
| 0.9 | 1350 kW | 1100 – 1300 kW |
👉 For long-term stable operation, it is recommended to run the 1500kVA oil immersed transformer at 70%–85% load.
✅Industry-Based Application Examples
Medium-Sized Industrial Plants
Power supply for production lines such as injection molding, mechanical processing and textile. Centralized power supply for 1000kW–1200kW total load with reserved expansion margin.
Commercial Complexes
Emergency and main power distribution for shopping malls, hospitals, schools and office buildings, ensuring stable operation of air conditioning, lighting and elevator systems.
New Energy Supporting Projects
PV & energy storage step-up substations: Connect 0.4kV low voltage to 11kV power grid with inverters, supporting green power consumption in industrial and commercial parks.
Water Conservancy & Sewage Treatment
Power supply for large water pumps, blowers and dewatering equipment in sewage plants. Weather-resistant oil-immersed design adapts to humid and outdoor environments.
Infrastructure
Power supply for highway service areas, tunnel lighting and railway signal systems, guaranteeing reliable long-distance power distribution.
EV Charging Stations
Dedicated power distribution for multiple DC fast charging piles. The 1500kVA capacity supports simultaneous high-power output of 10 to 20 fast charging piles.
Installation Guidelines of oil filled transformer
✅ The installation foundation shall be horizontal and firm, with bearing capacity ≥ 1.5 times of the total transformer weight (Reference weight of 1500kVA 11kV oil-immersed transformer: 3500~4200kg).
✅ Maintain sufficient ventilation and heat dissipation space: ≥600mm on the radiator side and ≥1000mm for maintenance passage.
✅ Install fences or protective nets for outdoor installation to prevent small animal intrusion; avoid direct sunlight or equip with sunshade shelters.
✅ Confirm phase sequence and test insulation resistance with a 2500V megohmmeter (primary to ground / secondary to ground) before high-voltage cable connection.
✅ Conduct 5 times of no-load closing impulse test before commissioning to check differential protection, gas protection and operating sound.
✅ Grounding resistance ≤ 4Ω; implement in accordance with design requirements for neutral point direct grounding system.
Maintenance Instructions & Test Specifications of Three Phase Oil Immersed Transformer
Routine Maintenance
Check oil level and oil quality every six months; conduct regular oil sampling for withstand voltage test and chromatographic analysis. Clean dust on heat sinks, inspect aging of tap changer contacts and sealing rings, fasten connecting bolts of conductive busbars, and monitor load condition and three-phase unbalance rate.
Factory & On-Site Testing of 1500kVA Oil Filled Transformer
Implemented in accordance with IEEE / IEC standards:
✔ Insulation resistance and dielectric loss factor test
✔ DC resistance measurement of high & low voltage windings
✔ Voltage ratio measurement and vector group verification
✔ No-load loss and no-load current test
✔ Load loss and short-circuit impedance measurement
✔ Induced withstand voltage and power frequency withstand voltage test
✔ Analysis of breakdown voltage and moisture content of oil samples
We guarantee 100% qualification rate for all factory-delivered 1500kVA oil filled distribution transformers.
Service Life Extension Measures
Conduct infrared thermal imaging inspection annually to monitor the temperature of bushings and connection points; install online oil temperature monitoring devices. Avoid overloading exceeding 130% rated capacity for more than 2 hours, and replace silica gel in breathers periodically.
Technical Parameter Sheet
| Item | Specification |
|---|---|
| Model | S13-M-1500/11 (S20 Class 1 energy efficiency optional) |
| Rated Capacity | 1500 kVA |
| Phase | Three Phase |
| Frequency | 50Hz / 60Hz (Customized) |
| High Voltage | 11 kV ±2×2.5% |
| Low Voltage | 0.4 kV / 0.433 kV (Customizable) |
| Vector Group | Dyn11 or Yyn0 |
| Short-Circuit Impedance | 6% (±10%) |
| No-Load Loss | ≤ 1650 W (S13 Standard) |
| Load Loss (75℃) | ≤ 14500 W |
| No-Load Current | ≤ 0.6% |
| Insulation Grade | Class A (105℃) / Class F Optional |
| Cooling Mode | ONAN |
| Protection Grade | IP54 (Outdoor Type) |
| Reference Weight | Approx. 3950 kg (Oil + Body + Tank) |
| Overall Dimension (L×W×H) | Approx. 2100×1450×1850 mm |
| Executive Standard | IEC 60076 / GB 1094.1-2013 |
Why Choose Our 1500kVA Three Phase Oil Immersed Transformer?
✅ Full copper winding design reduces heat generation and extends service life.
✅ Customized for harsh working conditions, suitable for high-altitude and high-humidity areas; the 1500kVA oil immersed transformer adopts patented anti-short-circuit structure.
✅ Complete type test reports provided; support third-party inspection and customized 1500kVA oil filled transformer testing.
✅ In-stock products for fast delivery; national engineering team provides on-site installation guidance and 24/7 after-sales support.
Certifications: CE, ISO9001:2025Exported to over 30 countries worldwide
Looking for a reliable 1500kVA oil immersed transformer for your project? GNEE provides high-quality solutions tailored to your needs.
👉 Contact us now to get the best price, technical support, and fast delivery for your 1500kVA oil filled distribution transformers!
FAQ
What does 1500 kVA mean?
What Does kVA Mean on a Generator. A generator is one item where kVA is used as a measure of power. Essentially, the higher the kVA rating, the more power the generator produces. Kilovolt-amps (kVA) measure the Apparent Power of a generator, while kilowatts (kW) measure the Actual Power.
How many amps is a 1500kVA transformer good for?
I calculate 1804 full load amps capacity for the 1500 kva transformer at 480 vac.
How much does a 1500 kVA transformer weight?
1500kVA pad-mounted transformer weighs about 3500kg.
How many watts is 1500 kVA?
Table of kVA to Watts Conversions
| kVA | Power Factor (PF) | Watts (W) |
|---|---|---|
| 1000.00 | 0.80 | 800000.00 |
| 1500.00 | 0.80 | 1200000.00 |
| 2000.00 | 0.80 | 1600000.00 |
| 10000.00 | 0.80 | 8000000.00 |
What is the full load current of A 1500kva transformer?
At 480V, a 1500 kVA three-phase transformer has a full load current of 1804.3 amps.
Can a 1500kVA oil filled transformer be installed indoors?
Yes, but indoor installation requires fire safety measures such as oil containment systems, fire barriers, and ventilation systems to ensure safe operation.
What is the installation time for a 1500kVA oil immersed transformer?
Installation of a 1500kVA oil immersed transformer typically takes one to three days depending on site readiness and complexity.
What is the efficiency of a 1500kVA Three Phase Oil Immersed Transformer?
A 1500kVA Three Phase Oil Immersed Transformer usually achieves an efficiency of 98% to 99%, depending on load conditions and design quality.
What is the service life of a 1500kVA oil immersed transformer?
A well-maintained 1500kVA oil immersed transformer can operate reliably for 20 to 30 years or longer.
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