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Junengda 33KV Oil-immersed Transformer overview>>>
The Junengda 33KV three-phase oil-immersed transformer is engineered to deliver superior performance in electrical power distribution and transmission networks. Designed for Versatile Applications, this transformer is suitable for both outdoor and indoor setups. In industrial, commercial, and utility sectors, it efficiently steps up or steps down voltages. Moreover, it ensures stable operation under heavy loads and extreme environmental conditions.
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Junengda 33KV 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) |
||||||
| 50 | 33 | ± 2×2.5% ±5 |
0.4 | Dyn11 Yyn0 |
160 | 1200/1140 | 1.30 | 6.5 |
| 100 | 230 | 2010/1910 | 1.10 | |||||
| 125 | 270 | 2370/2680 | 1.10 | |||||
| 160 | 280 | 2820/2680 | 1.00 | |||||
| 200 | 340 | 3320/3160 | 1.00 | |||||
| 250 | 400 | 3950/3760 | 0.95 | |||||
| 315 | 480 | 4750/4530 | 0.95 | |||||
| 400 | 580 | 5740/5470 | 0.85 | |||||
| 500 | 680 | 6910/6580 | 0.85 | |||||
| 630 | 830 | 7860 | 0.65 | |||||
| 800 | 980 | 9400 | 0.65 | |||||
| 1000 | 1150 | 1150 | 0.65 | |||||
| 1250 | 1400 | 1390 | 0.60 | |||||
| 1600 | 1690 | 1660 | 0.60 | |||||
| 2000 | 1990 | 1970 | 0.55 | |||||
| 2500 | 2360 | 2320 | 0.55 | |||||
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Junengda 33KV Oil-immersed Transformer Features>>>
Target Markets
Designed with cutting-edge technology and rigorously tested across 50+ countries, this transformer ensures seamless integration into diverse grid environments, from Southeast Asia and the Middle East to Africa and South America.
High Efficiency & Low Loss
Utilizing premium cold-rolled grain-oriented silicon steel cores and oxygen-free copper windings, our transformer minimizes no-load losses by 10–15% compared to conventional models. Advanced lamination techniques and robotic assembly ensure reduced noise levels and optimal energy efficiency, aligning with global standards like IEC 60076 and GB1094 .
Robust Reliability
Featuring a hermetically sealed tank with corrugated walls and vacuum welding, the transformer eliminates oil leakage risks. Enhanced structural integrity, including anti-loosening fasteners and multi-layer insulation, ensures stable operation in harsh environments, such as high humidity, chemical exposure, or extreme temperatures (-45°C to +40°C) .
Smart & Adaptive Design
Equipped with pressure relief valves, gas relays, and real-temperature monitoring systems, the transformer supports remote diagnostics and dynamic load adjustments. Its modular construction allows rapid deployment, reducing installation time by 30%, ideal for renewable energy projects and industrial complexes .
Global Compliance & Sustainability
Certified by IEC 60296 and GB/T 6451-2015, the transformer meets stringent environmental and safety regulations. Eco-friendly mineral oil and recyclable materials underscore our commitment to reducing carbon footprints while maintaining high-voltage stability (up to 38.5kV) and THD compliance below 5% .
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Junengda 33KV Oil-immersed Transformer Advantage>>>
Enhanced Safety
Featuring flame-retardant ester-based oil , our transformer significantly reduces explosion risks and suppresses fire propagation. Rigorous testing validates its compliance with IEC 61100 standards, ensuring resilience even during extreme electrical faults.
Uncompromised Stability
Intelligent cooling control—powered by PLC and LabVIEW technology—monitors oil temperature and load in real-time. This system dynamically adjusts cooling operations, preventing overheating and extending insulation lifespan for consistent 24/7 operation.
Lower Maintenance Costs
Ester oil’s high moisture absorption slows cellulose aging, delaying insulation replacement. Integrated remote monitoring cuts manual inspections, while reduced fire hazards eliminate auxiliary fire-suppression infrastructure.
Space-Saving Design
Compact engineering maximizes power density per unit area. Ideal for urban substations or confined installations, this 33kV three-phase oil-immersed transformer optimizes spatial efficiency without compromising capacity.
Eco-Friendly Performance
Biodegradable ester oil (OECD 301B-certified) minimizes environmental impact during leaks. Near-zero carbon emissions align with sustainability goals, avoiding regulatory penalties and protecting ecosystems.
Superior Energy Efficiency
Advanced core design reduces stray losses and noise emissions. Lower operating temperatures enhance load adaptability, while smart cooling cuts ancillary energy use—translating to reduced operational expenses.
Why Choose Junengda?
Our 33kV three-phase oil-immersed transformer merges innovation with durability. Trusted for critical infrastructure globally, it redefines value through safety, efficiency, and low total cost of ownership.
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Junengda 33KV Oil-immersed Transformer Case>>
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Industrial Power Supply in Saudi Arabia
Junengda’s 33 kV oil-immersed transformers ensure stable voltage conversion for Saudi Arabia’s Jubail Industrial City, one of the largest petrochemical hubs globally. These transformers efficiently support high-load operations in extreme desert temperatures, leveraging advanced cooling systems and robust insulation to minimize energy loss.
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Renewable Energy Integration in Germany
In Bavaria’s wind-solar hybrid parks, Junengda transformers facilitate seamless grid integration of renewable energy. By stepping up 33 kV output to match transmission standards, these units enhance energy transfer efficiency while mitigating voltage fluctuations caused by variable renewable generation.
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Urban Grid Modernization in China
Deployed in Shenzhen’s smart grid upgrade, Junengda 33 kV transformers enable efficient power distribution across high-density urban areas. Paired with IoT-enabled monitoring systems, they optimize load management and reduce transmission losses by 18%.
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Mining Sector Reliability in Chile
Chile’s copper mining operations rely on Junengda transformers to handle fluctuating loads in remote, high-altitude sites. Engineered for extreme conditions, these units feature reinforced mechanical stability and corrosion-resistant coatings, ensuring uninterrupted operation despite dust and humidity.
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Junengda 33KV Oil-immersed Transformer FAQ>>>
Q1：What is a 33kV Three-Phase Oil-Immersed Transformer?
A 33kV oil-immersed transformer is a power transformer designed to handle three-phase electrical systems with a voltage rating of 33 kilovolts (kV). It uses insulating oil for cooling and insulation.
Q2: What are the key design features of Junengda 33kV oil-immersed transformers?
Engineers build Junengda 33kV three-phase oil-immersed transformers with advanced A-grade insulation, ensuring a service life of 20-25 years under rated conditions. The design incorporates robust cooling systems, corrosion-resistant tanks, and precision-engineered cores to minimize energy loss and withstand voltage fluctuations of up to ±5%.
Q3: How does the temperature control system ensure safe operation?
Our transformers feature real-time temperature monitoring. The maximum allowable top oil temperature is 95°C, with a temperature rise limit of 55°C under full load. Over-temperature alarms and automatic load adjustment prevent insulation degradation, complying with IEC standards.
Q4: What environmental conditions are suitable for installation?
The 33kV oil-immersed transformer operates efficiently in ambient temperatures ranging from -25°C to 40°C. For optimal performance, ensure installation sites are well-ventilated, free from excessive dust, and maintain humidity below 80% RH.
Q5: How often should maintenance be performed?
Routine checks every 6-12 months are recommended:
Monitor oil levels (maintain between 1/4 and 3/4 of the oil gauge).
Inspect bushings for cracks or contamination.
Test insulation resistance and replace silica gel in breathers when discolored.
Q6: Can this transformer handle unbalanced three-phase loads?
Yes, but prolonged imbalance exceeding 25% of the rated current on the low-voltage side may cause overheating. Junengda transformers include neutral current limiters to mitigate risks, ensuring stable voltage output.
Q7: What overload capacity does the transformer support?
Short-term emergency overloads up to 1.3x rated current for 120 minutes are permissible. For cyclic loads, consult our load curve guidelines to avoid accelerated insulation aging.
Q8: How is fire safety ensured?
Fire-resistant mineral oil, pressure relief devices, and explosion-proof membranes are standard. Regular oil testing (every 3 years) detects degradation, while gas relay protection instantly isolates internal faults.
Q9: Are Junengda transformers compliant with international certifications?
Yes, our 33kV three-phase oil-immersed transformers meet IEC 60076, IEEE C57.12, and CE standards, with optional customization for regional grid codes.