15KV Three-phase Oil-immersed Power Distribution Transformer

• Junengda 15KV  Oil-immersed  Transformer  overview>>>

The Junengda 15kV three-phase oil-immersed transformer is engineered to deliver unmatched efficiency and durability in electrical power distribution and transmission systems. Designed to step up or step down alternating current voltages seamlessly, this transformer ensures stable performance under heavy loads and harsh environmental conditions, making it ideal for industrial, commercial, and utility application.

 

 

 

 

 

• Junengda 15KV  Oil-immersed  Transformer  Technical Specifications>>>                                                                                        
  

  Rated Capacity(KVA)	Voltage Combination and Decomposition Ranges			Vector Group	No-load Loss(w)	Load Loss(w)	No-load current (%)	Short Circuit Impedance(%)
  	High Voltage Tap Range（kv）	Tap Changing Scope（%）	Low Voltage (kv)
  30	15	±2×2.5 ±5	0.4	Dyn11 Yzn11 Yyn0	100	630/600	1.50	4.0
  50					130	910/870	1.30
  63					150	1090/1040	1.20
  80					180	1310/1250	1.20
  100					200	1580/1500	1.10
  125					240	1890/1800	1.10
  160					280	2310/2200	1.00
  200					340	2730/2600	1.00
  250					400	3200/3050	0.90
  315					480	3830/3650	0.90
  400					570	4520/4300	0.80
  500					680	5410/5150	0.80
  630				Dyn11 Yyn0	810	6200	0.60	4.5
  800					980	7500	0.60
  1000					1150	10300	0.60
  1250					1360	12000	0.50
  1600					1640	14500	0.50
  2000					1940	18300	0.40	5.0
  2500					2290	21200	0.40

• Junengda 15KV Oil-immersed  Transformer Features>>>

   

Standards & Certifications

Complies with IEC 60076, GB1094, GB/T 6451-2015, and IEC 60296.
Meets stringent international and national safety/performance requirements.

Primary Markets

Sold in 50+ countries and regions, including Southeast Asia, East Asia, and Central Asia.
Optimized for developing markets with diverse grid conditions (e.g., high humidity, extreme temperatures).

Application Scenarios

Designed for power generation enterprises, industrial plants, and mining facilities.
Suitable for 15 kV distribution systems in harsh environments.

Structure & Materials

Features robust oil-paper insulation for high durability, superior arc resistance, and thermal stability.
Compact structure enables flexible installation in space-constrained industrial sites.

System Performance

Delivers unmatched reliability and energy efficiency, minimizing no-load and load losses.
Supports extreme load fluctuations and ensures safe operation under harsh conditions.

• Junengda 15KV Oil-immersed  Transformer Advantage>>>

High Safety

Enhanced short-circuit withstand capability via high-strength mechanical construction.
Acoustic noise suppression technology minimizes operational disturbances.

Operational Stability

Ensures stable full-load operation under prolonged low-temperature conditions.
Maintains reliability in harsh environments, extending equipment lifespan (20-30 years).

Low Maintenance Cost

Engineered for low maintenance and high resilience, reducing lifecycle costs.

Space Efficiency

Optimized design for compact installation, ideal for urban and industrial settings.

Environmental Sustainability

Uses environmentally safe, corrosion-resistant insulating medium.
Aligns with global carbon neutrality goals, supporting renewable energy integration.

Energy Efficiency

Industry-leading loss reduction .
Efficiency exceeding 98.5%, surpassing stringent energy standards.

 

Why  choose Junengda?

Choose Junengda’s 15KV oil-immersed transformer for its proven reliability, efficient power distribution, and robust design in demanding applications.

 

 

• Junengda 15KV Oil-immersed  Transformer case >>>

1. Rural Grid Upgrading in Central China

Junengda’s 15 kV three-phase oil-immersed transformers have revolutionized rural electrification in regions like Henan Province. Installed in mountainous tea-growing areas, these transformers address low-voltage issues caused by expanding agricultural demands. By boosting voltage stability to 230V, farmers now power multiple electric tea-processing machines simultaneously, enhancing productivity while reducing line losses by 6–7%. Their compact design and resilience to harsh weather make them ideal for remote grid upgrades.

2. Wind-Solar Hybrid Power Stations in Southeast Asia

In Thailand’s renewable energy projects, Junengda’s transformers play a pivotal role in elevating wind turbine output from 1 kV to 15 kV for efficient grid integration. Paired with dry-type units at higher voltages, these oil-immersed models ensure minimal energy loss across long-distance 66 kV collector lines. Their robust insulation and cooling capabilities withstand tropical climates, supporting sustainable energy transmission for urban centers like Bangkok.

3. Industrial Power Management in Middle Eastern Manufacturing Hubs

A UAE-based steel plant adopted Junengda’s 15 kV three-phase oil-immersed transformers to stabilize its high-load operations. Integrated with smart monitoring systems, the transformers enable real-time tracking of parameters like temperature and dissolved gases, preventing unexpected downtime. This solution reduced hourly energy losses by 15% and aligned with the facility’s carbon-neutral goals.

4. Urban Distribution Networks in South American Cities

In Lima, Peru, Junengda’s transformers are deployed in urban substations to manage peak loads during extreme weather. Their high thermal endurance and leak-proof design ensure uninterrupted power for hospitals and commercial complexes. By optimizing voltage regulation, these transformers cut grid maintenance costs by 20%, proving critical for densely populated areas with aging infrastructure.

Junengda’s 15 kV three-phase oil-immersed transformers excel in diverse environments, from arid deserts to humid tropics, delivering reliability, efficiency, and adaptability

 

 

• Junengda 15kV  Oil-Immersed Transformer FAQ

1. What are the key applications of Junengda’s 15 kV three-phase oil-immersed transformer?

Junengda’s 15 kV three-phase oil-immersed transformer is ideal for power distribution networks, industrial plants, and renewable energy systems. It ensures stable voltage transformation for medium-voltage grids, supporting applications like factories, commercial complexes, and solar/wind farms. Its robust design suits both indoor and outdoor installations.

2. How does the transformer manage temperature during operation?

The transformer features an advanced oil-immersed cooling system. The maximum allowable top oil temperature is 95°C, with a temperature rise limit of 55°C under full load, ensuring optimal performance and longevity. Regular thermal monitoring prevents insulation aging and maintains efficiency even in high-ambient temperatures up to 40°C.

3. What overload capacity does this transformer offer?

Designed for reliability, the transformer supports short-term overloads up to 1.3x rated current for 120 minutes in emergencies, adhering to industry standards. For daily operations, controlled overloading is permitted based on load curves and ambient conditions to balance performance and lifespan.

4. How to ensure safe and efficient maintenance?

Check oil levels monthly, ensuring they remain between 1/4 and 3/4 of the oil gauge.

Inspect bushings and insulation for cracks or contamination quarterly.

Monitor silica gel in breathers—replace if it turns pink (indicating moisture saturation).

Schedule annual professional calibration and oil testing to maintain dielectric strength and prevent aging.

5. What safety certifications and features are included?

The transformer complies with IEC and IEEE standards, featuring a pressure relief valve, gas relay for fault detection, and corrosion-resistant tank. Its three-phase balance design limits neutral current to ≤25% of rated current, preventing voltage instability.

6. Can it handle unbalanced loads?

Yes, the transformer’s Y/Y0-12 winding configuration minimizes voltage imbalance risks. However, we recommend keeping phase load imbalance below 25% of the rated current to avoid excessive neutral currents and ensure stable operation.

7. What environmental conditions are suitable for installation?

It operates efficiently in temperatures from -25°C to 40°C and humidity ≤80% RH. For harsh environments, optional reinforced sealing and anti-corrosion coatings are available.

8. How long is the service life?

With proper maintenance, the transformer delivers 20–25 years of service. Key factors include avoiding prolonged overloads, ensuring clean oil, and routine inspections to address wear or leaks.