20 kV Class Three Phase Distribution Oil Immersed Transformer
20 kV Class Three Phase Distribution Oil Immersed Transformer
Zisheng’s 20 kV Class Three Phase Distribution Oil Immersed Transformer is a core medium-voltage product of Baoding Zisheng Electrical, a professional manufacturer with 20+ years of power equipment experience. Engineered for enhanced power supply capacity and energy efficiency, it meets IEC, IEEE, and ANSI standards, with hermetically sealed and conservator options. Ideal for urban grid expansion, industrial parks, and large-scale infrastructure, it delivers stable voltage quality, low energy loss, and reliable performance, backed by global after-sales support.
Key Features:
- High Power Supply Capacity
- Low Energy Loss
- Stable Voltage Quality
- Wide Grid Adaptability
Power Supply Capacity Advantages of 20 kV Class Three Phase Distribution Oil Immersed Transformer
Low Energy Consumption Design of 20 kV Class Three Phase Distribution Oil Immersed Transformer
Voltage Quality Guarantee of 20 kV Class Three Phase Distribution Oil Immersed Transformer
Sealing and Insulation Technology of 20 kV Class Three Phase Distribution Oil Immersed Transformer
Harsh Environment Adaptability of 20 kV Class Three Phase Distribution Oil Immersed Transformer
Case 1: State Grid Jiangsu Electric Power Co., Ltd.
Case 2: PT Pertamina (Indonesia)
Case 3: Dubai Electricity and Water Authority (DEWA)
Case 4: Kenya Power and Lighting Company (KPLC)
| Rated Power (kVA) | Rated High Voltage (kV) | Rated Low Voltage (kV) | Connection Symbol | Short Circuit Impedance (%) | No Load Loss (W) | On-Load Loss (W) | No Load Current (%) | Cooling Mode | Tank Type |
| 30 | 20/21 | 0.4 | Dyn11/Yyn0 | 4.5 | 95 | 565 | 1.9 | ONAN | Sealed/Conservator |
| 50 | 20/21 | 0.4/0.6 | Dyn11/Yyn0 | 4.5 | 120 | 840 | 1.8 | ONAN | Sealed/Conservator |
| 100 | 20/21 | 0.4 | Dyn11/Yyn0 | 4.5 | 185 | 1475 | 1.5 | ONAN | Sealed/Conservator |
| 250 | 20/21 | 0.4 | Dyn11/Yyn0 | 5.0 | 395 | 2965 | 1.0 | ONAN | Sealed/Conservator |
| 500 | 20/21 | 0.4 | Dyn11/Yyn0 | 5.0 | 670 | 5465 | 1.0 | ONAN | Sealed/Conservator |
| 1000 | 20/21 | 0.4 | Dyn11/Yyn0 | 5.0 | 1140 | 10250 | 0.6 | ONAN | Sealed/Conservator |
| 1600 | 20/21 | 0.4 | Dyn11/Yyn0 | 5.5 | 1630 | 14460 | 0.6 | ONAN/OFAF | Sealed/Conservator |
| 2000 | 20/21 | 0.4 | Dyn11/Yyn0 | 5.5 | 1930 | 16990 | 0.5 | ONAN/OFAF | Sealed/Conservator |
| 2500 | 20/21 | 0.4 | Dyn11/Yyn0 | 6.0 | 2320 | 20215 | 0.5 | ONAN/OFAF | Sealed/Conservator |
Note: All parameters comply with IEC 60076-1/7 standards. Custom voltage grades (18kV/22kV) and technical parameters are available for specific grid requirements.
It fully meets IEC, IEEE, and ANSI standards, holding CE (LVD/EMC), SGS, RoHS, and ISO 9001 certifications. Regional certifications (SABER for Middle East, UL/CSA for North America, UKCA for UK) can be applied for to ensure market access.
Standard models in stock: 20-25 working days; customized orders (e.g., special voltage, enhanced heat dissipation): 30-40 working days. Expedited delivery (15 days) is available for urgent projects with a 15% surcharge.
Yes. We can adjust short-circuit impedance, tap changer range, and voltage levels to match your local grid standards. For extreme environments (high temperature, salt spray, dust), we offer customized anti-corrosion, heat dissipation, and protection grade (IP44/IP54) upgrades.
Compared to 10 kV transformers, it has 50-80% higher power supply capacity, 20-30% lower line loss in long-distance transmission, and better voltage stability for large-scale power supply. It is more suitable for urban grid expansion, industrial parks, and large infrastructure projects.
We have technical teams stationed in Southeast Asia, the Middle East, and Africa, offering on-site installation guidance, commissioning, and maintenance. All products come with a 12-month warranty, and we provide lifelong technical support and spare parts supply via global logistics networks.
Routine maintenance is simple: monthly check oil level (conservator type) and operating temperature; quarterly inspect sealing joints for leaks; annually clean radiators (more frequently in dusty areas); hermetically sealed models require no oil replacement under normal operation for 20+ years.
Yes. It is optimized for renewable energy grid integration, with enhanced voltage regulation to handle fluctuations from solar/wind power. We can customize short-circuit impedance and insulation levels to match your renewable energy system’s technical requirements.
With high-quality raw materials, advanced production technology, and strict quality control, the designed service life is 25 years. Under normal operation and regular maintenance, the actual service life can extend to 30 years.
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