110kV Oil-immersed Distribution Transformer
2.Frequency:50/60Hz
3.High voltage:110kV,Low Voltage:6.3/6.6/10.5/11kV
4.Winding material:copper\Aluminum
5. Dual-winding (SF/SFZ) or three-winding (SFSZ) designs with on-load (OLTC) or off-circuit (OCTC) tap changers.
6.Cooling: ONAN (self-cooled) or ONAF (forced-air).
- Fast Delievery
- Quality Assurance
- 24/7 Customer Service
Product Introduction
1.110kV Oil-immersed Distribution Transformer: Powering Reliable Energy Networks
When your operations demand stable, efficient energy distribution, the 110kV Oil-immersed Distribution Transformer stands as a cornerstone of modern power infrastructure. Designed for utilities, industries, and large-scale projects, this transformer combines advanced engineering with rugged durability to deliver seamless voltage conversion across grids, factories, and renewable energy systems. With configurations tailored for 50/60Hz networks and compliance with global standards like IEC 60076, it ensures your systems stay resilient under dynamic loads and harsh environments.
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2.Technical Specifications
- Input Voltage: 110kV
- Output Voltage: 440V (adjustable to 6.3/6.6/10.5/11kV)
- Frequency: 50/60Hz
- Winding Materials: Copper or Aluminum
- Cooling Methods: ONAN (self-cooled) or ONAF (forced-air)
- Designs: Dual-winding (SF/SFZ) or three-winding (SFSZ) with on-load/off-circuit tap changers
| Type | Rated Capacity (kVA) | HV(kV) | Connection Symbol | No-load Loss (kW) | Load Loss (kW) | No-load Current | Short-circuit impedance (%) |
| SZ9-1000/35 | 1000 | 35 | YNyn0dll | 1.55 | 12.78 | 1.2 | 6.5 |
| SZ9-1250/35 | 1250 | 1.88 | 15.41 | 1.2 | 6.5 | ||
| SZ9-2500/35 | 2000 | 2.88 | 20.25 | 1.1 | 6.5 | ||
| SZ9-3150/35 | 2500 | 3.4 | 21.74 | 1.1 | 6.5 |
3.Key Features & Benefits
1. Customized Performance for Diverse Needs
Choose between copper or aluminum windings to balance cost and conductivity. Our transformers support dual- or three-winding configurations, enabling precise voltage regulation for industries like metallurgy, rail transit, and urban power grids.
2. Energy Efficiency & Loss Reduction
Optimized magnetic cores and low-loss materials minimize no-load and load losses, achieving up to 99.7% efficiency. This reduces operational costs and supports sustainability goals.
3. Robust Construction for Harsh Conditions
The oil-immersed design provides superior insulation and heat dissipation, ensuring stable operation in temperatures ranging from -40°C to 50°C. Seismic reinforcements and corrosion-resistant tanks make it ideal for coastal or earthquake-prone regions.
4. Smart Monitoring Compatibility
Integrate IoT sensors for real-time dissolved gas analysis (DGA) and temperature tracking, enabling predictive maintenance and reducing downtime risks.
4.Applications
Be used in a wide range of industries.

Industrial Plants
Eliminate power factor penalties in CNC machines and assembly lines while handling surge currents up to 100x rated capacity.

Substation
Stabilizes substation voltage against harmonics and intermittent generation from renewable inverters.

Commercial Buildings
Retrofit aging systems in hospitals or malls with silent (<45dB), flame-retardant capacitors that meet NFPA 70 fire codes.
5.Design & Construction
The 110kV Oil-immersed Distribution Transformer features a laminated silicon steel core to minimize eddy current losses. The oil-filled tank acts as both coolant and insulator, while pressboard barriers and porcelain bushings enhance dielectric strength. Radial and axial clamping systems prevent winding displacement during short circuits.
6.Manufacturing & Quality Assurance
- Materials: Grain-oriented steel cores, ASTM-certified transformer oil.
- Testing: Routine impulse, temperature-rise, and partial discharge tests (per IEC 60076).
- Certifications: ISO 9001 (quality), ISO 14001 (environmental).
7.Why Partner With Us?
- National 863 Program Contributor: Leverage R&D expertise from China’s top tech initiatives.
- End-to-End Support: From site-specific design to 24/7 after-sales service.
- Global Compliance: Units pre-certified for IEEE C57.12, and GOST standards.
- Proven Reliability: 25+ year lifespan with <0.5% annual failure rate in field tests.



8.FAQs
Q: How do I transport a 3150kVA+ transformer safely?
A: Keep tilt angles below 15° (major axis) and 10° (minor axis). Adjust oil levels to 100mm below the tank cover before shipping.
Q: What maintenance ensures long-term performance?
A: Conduct biannual oil testing for moisture/acid content and annual thermographic inspections.
Q: Can it handle overloads?
A: Yes—150% overload capacity for 30 minutes, 125% for 60 minutes.
Q: Are fire-resistant models available?
A: Yes—ask about our low-flammability ester-oil transformers compliant with IEC 61039.
9.Contact Us
Need a Quote or Technical Advice?
Email our team at xaxd_electric@163.com for responsive, expert support.
Engineered for resilience, trusted by global operators—explore how our 110kV Oil-immersed Distribution Transformer can future-proof your energy infrastructure.
10.Factory Show


11.Equipment Display

12.Application Cases
State Grid systems, power engineering, steel and metallurgy, petrochemicals, rail transportation, energy and water conservancy, construction, environmental protection, and renewable energy sectors
13.Team and Exhibition

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