S20 35 kV Three Phase Power Oil Immersed Transformer

S20 35 kV Three Phase Power Oil Immersed Transformer
Zisheng’s S20 35 kV Three Phase Power Oil Immersed Transformer delivers reliable energy distribution for industrial and commercial applications. Designed with high-quality materials, advanced insulation, and optimized oil circulation, this transformer ensures stable operation in harsh environments. Its superior short-circuit resistance, energy efficiency, and compliance with international standards make it ideal for power distribution, substations, and renewable energy projects worldwide. The S20 35 kV Three Phase Power Oil Immersed Transformer embodies Zisheng’s commitment to quality, reliability, and long-term performance.
Key Features:
- High Efficiency
- Superior Durability
- Stable Operation
- Energy Saving
- Customizable Design

What Makes the S20 35 kV Three Phase Power Oil Immersed Transformer Ideal for Substations?
The S20 35 kV Three Phase Power Oil Immersed Transformer is designed to handle high-voltage transmission and distribution in substations. Its robust insulation and oil-filled design ensure continuous performance, even under heavy load or fluctuating grid conditions. With a high energy efficiency rating, it minimizes power loss while providing stable voltage output.
How Does the S20 35 kV Transformer Ensure Safety and Reliability?
Zisheng employs certified high-grade materials, advanced thermal management, and strict quality control. The oil-immersed design enhances heat dissipation, reducing risks of overheating. Short-circuit resistance and overload capacity are optimized to prevent failures, ensuring safe and reliable operation for decades.
Can the S20 35 kV Transformer Operate in Harsh Environments?
Yes. The transformer is engineered to operate under high humidity, extreme temperatures, and polluted environments. Its oil-immersed system provides superior insulation, protecting internal components from moisture and contaminants.
What Industrial Applications Are Suitable for the S20 35 kV Transformer?
The transformer is widely used in industrial plants, commercial facilities, renewable energy projects, and urban substations. Its robust design and customizable configurations allow integration into mining, telecom, data centers, and PV energy storage systems.
How Does Zisheng Ensure Compliance and Longevity?
All S20 35 kV transformers meet international standards including CUL and IEC. Routine testing, quality control, and adherence to strict manufacturing processes guarantee long-term durability, operational stability, and minimal maintenance requirements.
About ZISHENG ELECTRICAL
Zisheng are a professional 19+ years manufacturer in producing Oil-Immersed Transformers, Compact Substation, Pad Mounted Transformers, Pole Mounted Transformers and Dry Type Transformers. We own the certificates of ISO/CE/IEC 60076 and TUV Rheinland.
Transformers undergo rigorous FAT and type testing, support voltage/capacity customization. Welcome to consult for Catalog and Product. you can contact us at email info@bdzstransformer.com.

- Ghana Energy Grid Expansion – Zisheng supplied 10 units of S20 35 kV Three Phase Power Oil Immersed Transformers for a new substation in Accra, enabling stable industrial and residential electricity distribution.
- Kenya Mining Operation – 5 units installed at a mining site in Nairobi ensured high-load stability and reduced transformer maintenance costs.
- Brazil PV Energy Storage Project – 7 units deployed to support renewable energy integration, enhancing grid efficiency and reducing transmission losses.
- Philippines Industrial Park – 12 units deployed across multiple factories to improve power reliability and minimize downtime.
Product Specifications
| Parameter | Value |
|---|---|
| Rated Voltage | 35 kV |
| Rated Capacity | 1000–5000 kVA |
| Frequency | 50/60 Hz |
| Phase | Three Phase |
| Cooling Type | Oil Immersed |
| Insulation Level | Class F |
| Short-Circuit Resistance | High |
| Efficiency | ≥98% |
| Certification | CUL, IEC |
Note: All parameters comply with IEC 60076-1/7 standards. Custom voltage grades (18kV/22kV) and technical parameters are available for specific grid requirements.
The transformer is rated for a maximum of 35 kV.
Yes, its design supports high-load variations without performance loss.
Absolutely, it can operate reliably under high humidity and elevated temperatures.
With proper maintenance, the service life exceeds 25 years.
Yes, Zisheng provides tailored configurations including capacity, voltage, and cooling options.
Oil Immersed Transformer – Utilizes high-quality insulating oil to maintain stable temperature and prevent electrical faults.
Oil Immersed Power Transformer – Optimized for long-distance energy transmission with superior insulation and energy efficiency.
1000 kVA Oil Filled Transformer – Compact solution for medium-load applications requiring reliable power distribution.
Hermetically Sealed Oil Filled Transformer – Prevents moisture ingress and contamination, extending transformer life.
Immersed Transformer – Standard oil immersion ensures optimal thermal management and dielectric performance.
Oil Filled Distribution Transformers – Ideal for urban and rural distribution networks with high reliability.
Oil Filled Transformer Sizes – Multiple capacities from 500 kVA to 5000 kVA to meet varied project requirements.
Oil Immersed Distribution Transformer – Provides stable voltage output for commercial and industrial networks.
Oil Immersed Hermetically Sealed Type Transformer – Combines oil immersion with hermetic sealing for harsh environments.
Oil Immersed Self Cooled Transformer – Uses natural convection to reduce maintenance and eliminate external cooling systems.
Oil Immersed Type Transformer – Standardized design for long-term reliability in industrial and utility applications.
Three Phase Oil Immersed Transformer – Designed for high-capacity, three-phase power networks, offering maximum stability.
Transformer Oil Immersed Type – Trusted solution for substations and distribution networks worldwide.
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