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S20 type 35KV oil-immersed power transformer

1. Voltage rating: 35KV; 2. Adjustable voltage (no excitation voltage regulation); 3. Tap range: ±2*2.5%; 4. Capacity range: 630-31500kVA; 5. Frequency: 50Hz, 60Hz; 6. Number of phases: Single-phase, Three-phase; 7. Noise level: ≤60dB(A) (1000kVA); 8. Structure: Corrugated tank (small capacity), flat tank (large capacity); 9. Connection group designation: Dyn11 (preferred) or Yd11; 10. Impedance voltage: Conforms to the specifications in the technical parameter table (or as required by the user); 11. Operating environment: Maximum outdoor temperature not exceeding 40℃ (or as required by the user). 12. Cooling method: oil-immersed self-cooling, oil-immersed air cooling. 13. Intelligent and flexible: IoT intelligent adaptation, flexible installation scenarios.

Product Description

S20 Type 35KV Oil-Immersed Power Transformer 

When you need dependable power distribution for industrial facilities, utilities, or large-scale projects, the S20 type 35KV oil-immersed power transformer from Lijie Electric delivers proven performance. With capacity ranging from 630kVA to 31,500kVA and Level 1 energy efficiency, our transformers reduce operational costs while ensuring stable power supply. Backed by our 500,000-square-meter manufacturing facilities and a team of over 160 specialized engineers, each unit undergoes rigorous testing to meet GB1094 and IEC60076 standards. Our product features an extended 30-year outdoor lifespan and noise levels as low as 60dB(A).

Medium-sized power transformer

Technical Specifications

Parameter Specification
Voltage Rating 35KV
Capacity Range 630-31500kVA
Frequency 50Hz / 60Hz
Number of Phases Single-phase / Three-phase
Voltage Regulation No-load tap changer
Tap Range ±2×2.5%
Connection Group Dyn11 (preferred) / Yd11
Noise Level ≤60dB(A) @ 1000kVA
Cooling Method Oil-immersed self-cooling / Air cooling
Structure Type Corrugated tank (small capacity) / Flat tank (large capacity)
Operating Temperature Maximum 40℃ outdoor
Standards Compliance GB1094, GB/T6451-2008, IEC60076
Certifications ISO 9001:2015, CE, IEC

Why Choose Our 35KV Power Transformers?

Superior Energy Performance

Our transformers accomplish Level 1 vitality effectiveness benchmarks. This implies you'll see quantifiable decreases in power costs from day one. The progressed center plan minimizes no-load misfortunes. Your office works more financially over decades of service.

Built to Final Decades

The completely fixed development expands maintenance-free operation essentially. You get up to 30 a long time of open air benefit life. That's 50% longer than conventional S11 models. Less support mediations cruel lower add up to proprietorship costs for your operation.

Enhanced Security Standards

Risk resistance surpasses national prerequisites by considerable edges. The layered tank plan suits warm development actually. Inside blame assurance frameworks react immediately to unusual conditions. Your framework remains secured around the clock.

Quiet and Eco-Friendly Operation

With commotion levels at or underneath 60dB(A), these units work well in noise-sensitive situations. Private zones, clinics, and instructive campuses advantage from whisper-quiet operation. The oil-immersed cooling strategy works without hurtful emissions.

Smart Network Compatible

Modern IoT network alternatives let you coordinate these transformers into brilliantly control administration frameworks. Real-time checking gives operational information when you require it. Farther diagnostics decrease reaction times for any execution issues.

Medium-sized power transformer

Ideal Applications

You'll find our S20 type 35KV oil-immersed power transformer perfectly suited for:

  • Industrial Manufacturing Plants: Reliable power for production lines and heavy machinery
  • Mining Operations: Robust performance in demanding environments
  • Commercial Complexes: Efficient distribution for shopping centers and office buildings
  • Renewable Energy Projects: Grid connection for solar and wind installations
  • Infrastructure Development: Power substations and distribution networks
  • Rural Electrification: Extending reliable electricity to underserved areas

Manufacturing Excellence You Can Trust

Lijie Electric works two major generation offices crossing 500,000 square meters. Our group of over 2,000 experts incorporates doctoral and master's degree holders specializing in transformer technology.

Every transformer passes assessment by the National Transformer Quality Supervision and Review Center. Third-party confirmation from Wuhan Tall Voltage Inquire about Established affirms execution specifications.

We customize generation to coordinate your correct necessities. Standard conveyance times extend from 6 to 30 days depending on details. Our worldwide supply chain serves clients over Australia, India, Vietnam, Malaysia, Indonesia, Egypt, Kenya, and past.

Comprehensive Support Services

When you partner with us, you receive more than equipment. Our support package includes:

  • Complete technical documentation and test reports
  • Installation guidance from experienced technicians
  • Spare parts availability throughout product lifetime
  • After-sales support meeting GB/T 27922-2021 standards
  • Customization options for unique project requirements

Frequently Asked Questions

Q: What's the distinction between S20 and more seasoned transformer models?

A: The S20 arrangement offers Level 1 vitality productivity compared to more seasoned plans. You'll involve lower misfortunes, expanded support interims, and calmer operation. The completely fixed structure pairs the maintenance-free period.

Q: Can I utilize this transformer in extraordinary temperature conditions?

A: Standard models work dependably up to 40℃ encompassing temperature. We offer customized arrangements for more extraordinary situations. Contact our designing group to examine your particular climate requirements.

Q: How long does conveyance take regularly?

A: Generation cycles extend from 6 to 30 days based on capacity and customization level. We'll give a exact timeline after checking on your specifications.

Q: What cooling strategies are available?

A: We offer oil-immersed self-cooling for most applications. Oil-immersed discuss cooling is accessible for establishments requiring improved warm scattering in higher surrounding temperatures.

Q: Is farther checking possible?

A: Yes. Our transformers back IoT integration for keen network applications. You can track operational parameters, get cautions, and perform diagnostics remotely.

Q: What certifications do these transformers carry?

A: All units hold ISO 9001:2015, CE, and IEC certifications. They comply with GB1094 and IEC60076 worldwide benchmarks. CQC vitality effectiveness certification affirms execution claims.

Get Started Today

Ready to upgrade your S20 type 35KV oil-immersed power transformer power distribution infrastructure? Reach out to our team at lijieelectrical@gmail.com to discuss your project requirements.

Customer reviews background image

Here are some reviews from our users:

April 27, 2025

With a tight project schedule, the manufacturer delivered on time, and on-site technical personnel provided guidance throughout the entire installation and commissioning process; the collaboration was highly efficient and hassle-free.

July 2, 2025

During the preliminary phase, a selection plan was custom-tailored based on the actual site load requirements, resulting in a high degree of parameter compatibility. After-sales support responds within two hours, and ongoing technical support for operation and maintenance is comprehensive; we feel completely confident in a long-term partnership.

November 18, 2025

Deployed as a supporting component for a 35kV grid-connection project at a photovoltaic power station, the equipment operates for an average of 16 hours daily. It demonstrates excellent control over no-load losses, ensures smooth power generation and grid integration, and effectively reduces the station's overall energy consumption.

January 30, 2026

Under the continuous, high-load operating conditions of a factory production line, the equipment maintains stable electrical parameters and exhibits strong overload resistance, thereby guaranteeing an uninterrupted power supply for industrial production.

April 3, 2026

Integrated as a supporting component for a new energy photovoltaic grid-connection system, the manufacturer provided professional technical coordination and timely after-sales support, ensuring seamless adaptation to the specific electrical operating conditions required for grid integration.

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