110 kV Three Phase Power Oil Immersed Transformer
110 kV Three Phase Power Oil Immersed Transformer
Zisheng’s 110 kV Three Phase Power Oil Immersed Transformer is a core high-voltage product of Baoding Zisheng Electrical, a manufacturer with 20+ years of power equipment R&D and production experience. Compliant with IEC, IEEE, ANSI, and CSA standards, it features a CRGO silicon steel core, optimized windings, and advanced sealing technology, delivering low loss, high insulation safety, and stable operation. Ideal for large-scale power grids, substations, and industrial complexes, it is backed by global certification and professional after-sales support.
Key Features:
- Low Loss Core
- High Insulation Safety
- Reliable Sealing
- Stable Operation
- Wide Grid Adaptability
How does the 110 kV Three Phase Power Oil Immersed Transformer ensure insulation reliability at 110 kV?
What design makes the 110 kV Three Phase Power Oil Immersed Transformer energy-efficient?
How does the cooling system of the 110 kV Three Phase Power Oil Immersed Transformer work?
What structural features enhance the mechanical stability of the 110 kV Three Phase Power Oil Immersed Transformer?
How does the 110 kV Three Phase Power Oil Immersed Transformer adapt to large-scale power grid operations?
Case 1: State Grid Henan Electric Power Co., Ltd.
Application Scenario: 110 kV power grid transformation to replace aging transformers and improve transmission efficiency.
Solution: 30 units of 31500 kVA OFAF-cooled transformers with low-loss design and enhanced insulation.
Results: No-load loss reduced by 38%, annual energy savings of ~$1.2 million; stable operation for 30 months with zero unplanned outages, supporting the integration of 500 MW solar power into the grid.
Case 2: Electricity Generating Authority of Thailand (EGAT)
Application Scenario: 110 kV substation construction for heavy-industry power supply, requiring high reliability and compact design.
Solution: 22 units of 25000 kVA ONAN/OFAF dual-mode transformers with sealed oil conservators.
Results: Compliant with Thai Industrial Standard (TIS), operated continuously for 24 months without downtime; compact design saved 15% substation space, supporting on-schedule industrial zone development.
Case 3: Emirates Water and Electricity Company (EWEC)
Application Scenario: Outdoor 110 kV substations in high-temperature desert environments, requiring heat resistance and low maintenance.
Solution: 18 units of 40000 kVA OFWF-cooled transformers with corrosion-resistant coating and enhanced heat dissipation.
Results: Stable operation at 55℃ ambient temperature; maintenance frequency reduced by 70%, meeting EWEC’s “low maintenance” requirements; passed SASO certification for UAE market access.
Case 4: Nigeria Electricity Regulatory Commission (NERC)
Application Scenario: Long-distance 110 kV power transmission for rural areas, requiring cost-effectiveness and durability.
Solution: 25 units of 16000 kVA conservator-type transformers with reinforced tank structure and dust-proof design.
Results: Reduced rural grid construction costs by 45%; power supply coverage expanded to 120+ villages; withstood dusty and humid conditions, service life verified to exceed 25 years.
| Rated Power (kVA) | High Voltage (kV) | Low Voltage (kV) | Connection Symbol | No Load Loss (kW) | On-Load Loss (kW) | No Load Current (%) | Cooling Mode |
|---|---|---|---|---|---|---|---|
| 6300 | 63/66/110 | 6.3/10.5 | YNd11/YNyn0 | 9.4 | 34.0 | 0.63 | ONAN/OFAF |
| 10000 | 69/110/132 | 6.6/11.0 | YNd11/YNyn0 | 13.1 | 47.6 | 0.75 | ONAN/OFAF |
| 25000 | 110/138/220 | 10.5/33.0 | YNd11/YNyn0 | 25.6 | 99.5 | 0.40 | OFAF |
| 40000 | 110/138/220 | 11.0/33.0 | YNd11/YNyn0 | 36.2 | 140.3 | 0.39 | OFAF/OFWF |
| 63000 | 110/138/220 | 10.5/69.0 | YNd11/YNyn0 | 52.0 | 210.0 | 0.39 | OFWF |
| 120000 | 110/138/220 | 13.8/69.0 | YNd11/YNyn0 | 85.0 | 328.0 | 0.46 | OFWF |
| 240000 | 110/138/220 | 13.8/69.0 | YNd11/YNyn0 | 144.0 | 539.0 | 0.40 | OFWF |
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 60076, IEEE C57.12, ANSI C57.12.00, and CSA standards, holding CE (LVD/EMC), SGS, RoHS, ISO 9001, ISO 45001, and ISO 14001 certifications. Regional certifications such as SASO (Middle East), UL/CSA (North America), and UKCA (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.
Preventive measures include: conducting annual induction withstand voltage and partial discharge tests; regular inspection of oil quality (moisture, dielectric loss); cleaning radiators and checking sealing joints quarterly; and avoiding overloading beyond 120% of rated power for extended periods.
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 tap changer range to match the technical requirements of renewable energy generation systems.
Routine maintenance includes: monthly checking of oil level, temperature, and pressure relief valve; quarterly inspecting insulation resistance and sealing joints; annually testing oil quality and cleaning radiators (more frequently in dusty areas); and conducting comprehensive insulation tests every 3 years.
Compared to 35 kV/20 kV transformers, it has 3-5 times higher power supply capacity, lower line loss in long-distance transmission (reduced by 50-60%), and stronger insulation and mechanical stability. It is designed for large-scale regional power grids and high-power industrial applications.
For ambient temperatures above 45℃, forced oil-air cooled (OFAF) or forced oil-water cooled (OFWF) modes are recommended. These systems enhance heat dissipation efficiency by 40-60% compared to self-cooled modes, ensuring stable operation in desert or tropical regions.
With high-quality raw materials, advanced production technology, and strict quality control, the designed service life is 30 years. Under normal operation and regular maintenance, the actual service life can extend to 35 years.
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