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Industrial Three Phase Power Transformer 5-63MVA 110kV Primary 11kV Secondary ONAN Oil
Product Spotlights
Reliable 5-63 MVA three-phase power transformer with 110kV/11kV ratings and ONAN oil cooling. Low-loss core, customizable taps, and robust construction. Backed by ISO9001 certified manufacturer with global export experience and responsive after-sales support.
US$ 5999
≥1 Unit
Key Specifications
Get Latest Price
Power Rating:
5-63 MVA
Primary Voltage:
110 kV
Secondary Voltage:
11 kV
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Power Rating
5-63 MVA
Primary Voltage
110 kV
Secondary Voltage
11 kV
Cooling Method
ONAN (Oil Natural Air Natural)
Insulation Medium
Mineral Oil
Frequency
50/60 Hz (Customizable)
Phase
Three Phase
Winding Connection
Delta/Star, Star/Star (Customizable)
Application
Power Transmission & Distribution Substations
Standards
IEC 60076, IEEE C57.12.00, Custom Options
Jinhua Dika Electrical Equipment Co., Ltd. proudly introduces our Industrial Three Phase Power Transformer 5-63MVA 110kV Primary 11kV Secondary ONAN Oil – a robust, high-efficiency solution designed for demanding power transmission and distribution networks. As a specialized manufacturer with over a decade of expertise, we understand the critical role transformers play in reliable electricity supply. This transformer series combines proven oil-immersed technology with advanced manufacturing processes to deliver stable voltage transformation, low losses, and exceptional durability. Whether you are upgrading an existing substation or building a new industrial facility, our transformer offers the performance and flexibility your project requires.
Our transformers are engineered to meet international standards and are built with high-grade electrical steel, precision-wound copper conductors, and premium oil-impregnated insulation systems. The ONAN (Oil Natural Air Natural) cooling design ensures efficient heat dissipation without external fans or pumps, reducing maintenance and operational costs. Every unit undergoes rigorous factory acceptance testing to guarantee safety, reliability, and compliance with customer specifications.
Key Product Features & Benefits
- Versatile Power Range (5-63 MVA): Suitable for a wide array of applications – from industrial plants to utility substations – allowing you to select the ideal capacity for your load requirements.
- High Voltage Ratings (110 kV / 11 kV): The primary side is rated for 110 kV, enabling direct connection to transmission grids, while the secondary 11 kV output is compatible with medium-voltage distribution systems.
- ONAN Oil Cooling: Natural oil circulation combined with natural air cooling eliminates the need for auxiliary cooling equipment, resulting in lower noise, less maintenance, and higher reliability.
- Highly Efficient Core Design: Low-loss grain-oriented silicon steel laminations reduce no-load and load losses, improving overall operational efficiency and reducing energy costs over the transformer’s lifespan.
- Robust Mechanical Construction: The tank is fabricated from high-quality steel with anti-corrosion coating, ensuring long-term performance even in harsh environments like coastal areas or industrial zones.
- Comprehensive Protection: Standard fittings include pressure relief devices, oil level gauge, temperature indicator, and conservator tank with oil preservation system. Optional accessories such as Buchholz relay, cooling fans (ONAF), and tap changers are available upon request.
- Customizable Tappings & Impedance: Off-circuit or on-load tap changers can be provided to adjust voltage ratios according to grid conditions. Short-circuit impedance can be optimized to limit fault currents while maintaining system stability.
- Worldwide Shipping & Installation Support: We ship from major Chinese ports (Shanghai, Tianjin, Guangzhou, Ningbo) and offer technical documentation, installation supervision, and after-sales service.
Technical Specifications (Typical Values)
| Parameter | Value (Range) | Remarks |
|---|---|---|
| Rated Power (MVA) | 5 – 63 | Continuous rating |
| Primary Voltage (kV) | 110 | Other voltages custom |
| Secondary Voltage (kV) | 11 | Adjustable via taps |
| Cooling Type | ONAN | Upgrade to ONAF optional |
| Frequency (Hz) | 50 / 60 | Dual frequency design |
| No-Load Loss (kW) | 10 – 45 (approx.) | Based on rating |
| Load Loss (kW) | 50 – 220 (approx.) | At rated current |
| Insulation Level (LI) | 550 kV / 95 kV (Primary) | Impulse withstand |
| Winding Material | Copper (standard) / Aluminum (optional) | Copper for lower loss |
All parameters can be fine-tuned during the design phase to match your specific site conditions and local grid requirements. Our engineering team collaborates closely with clients to ensure seamless integration into existing systems.
Why Choose Jinhua Dika Electrical?
- Manufacturing Excellence: We operate a dedicated production facility with advanced winding machines, core cutting lines, and oil processing equipment. Our quality management system is certified to ISO9001, ISO14000, and OHSAS18001, ensuring consistent product quality.
- Proven Export Track Record: With an annual export value of US$1 Million – US$1.5 Million, we have supplied transformers to markets across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and more.
- Experienced Team: Our staff of 11–50 skilled professionals includes design engineers, quality inspectors, and project managers dedicated to delivering on time and within specification.
- Full Compliance & Documentation: We provide comprehensive test reports, wiring diagrams, and compliance certificates as per your local standard requirements (IEC, ANSI, GOST, etc.). Additional certifications such as TL900, HACCP, or SA8000 are available for specific project needs.
- Responsive After-Sales Support: Our technical team is ready to assist with installation, commissioning, and troubleshooting. We also offer spare parts packages and extended warranty options.
Investing in a Jinhua Dika transformer means choosing a partner committed to powering your infrastructure reliably for decades. Contact us today to discuss your project – whether it requires a standard 20 MVA unit or a custom 63 MVA design with special impedance, we are ready to deliver a solution that meets your exact needs. Let us help you energize your future.
Frequently Asked Questions (FAQ)
-
Q: What is the typical lead time for a 5-63 MVA ONAN transformer?
A: Standard designs take 8–12 weeks from order confirmation, while custom units may require 12–16 weeks depending on complexity. We can expedite for urgent projects by prior arrangement. -
Q: Can the transformer operate at altitudes above 1000m?
A: Yes. We can adjust insulation levels and cooling margins for high-altitude installations. Please specify the altitude in your inquiry so we can optimize the design. -
Q: Is on-load tap changer (OLTC) available for this model?
A: Absolutely. We offer both off-circuit tap changers (DETC) and on-load tap changers (OLTC) from leading brands. OLTC allows voltage regulation without disconnecting the load, ideal for grids with frequent voltage variations. -
Q: What type of oil is used? Can I request vegetable oil or synthetic ester?
A: Standard is mineral oil per IEC 60296. For environmentally sensitive areas, we can supply natural ester (vegetable oil) or synthetic ester fluids – please indicate at the time of quotation. -
Q: Do you provide the transformer with a nitrogen blanket or oil preservation system?
A: Yes. Our standard design includes a conservator tank with air-cell or bag-style oil preservation to prevent moisture ingress. A nitrogen blanket system is available as an option upon request. -
Q: How do you ensure the quality of insulation and no discharge during test?
A: Every unit undergoes partial discharge (PD) measurement, power factor tests, and induced voltage tests. We also perform a full routine test per IEC 60076 including impulse test, winding resistance, and ratio check. -
Q: What are the payment terms for export orders?
A: Typically we accept T/T (30% deposit, 70% before shipment) or L/C at sight. For long-term partners, other flexible terms can be negotiated. -
Q: Can I visit your factory before placing an order?
A: Certainly. We welcome factory audits and inspections. Our factory is located in Jinhua, Zhejiang, China – just 2 hours from Shanghai. We can arrange pick-up and translation services.
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Annual Export Value
US$1 Million - US$1.5 Million
Total Employees
11 - 50 People
Product Certifications
HACCP, TL900, QS9000, SA8000, ISO9001, ISO9004, ISO17799, ISO9000, ISO14000, ISO10441, ISO16949, TS16969, ISO19011:2000, OHSAS18001, Others
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