Products

WinPower 110kV 230 kV transformers are designed and manufactured according to international standard.

1. GB 6451 Specification and technical requirements for oil-immersed power transformers;
2. IEC 60076 Power Transformers;
3. AS NZS 60076 Power Transformers;
4.CSAC88-16 Power Transformers;
5. ANSI/IEEE C57.12.00 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers;
6. GOST R 52719 Power Transformers - General Specifications;
7. EN60076 Power Transformers
8. Local After-Sales Services In North America South America, and other regions respond to your needs within 24 hours. etc, the power ratings are up to 300 MVA, and for voltages up to the highest insulation class of 900 kV.

How to OEM/customization?

The customization process for 110 kV and 220 kV large transformers is a complex and intricate process that covers multiple stages from requirement analysis to product delivery. The following is a general customization process:

How we started

• Requirement analysis
  Requirements collection: analyzes and determines the general model, specifications, technical parameters, and usage environment of the required transformer based on the power system requirements.
  Assessment of Requirements: Evaluate the collected requirements to ensure technical feasibility and economic rationality
   
• Technical Exchange
  Technical communications: Conduct technical exchanges with us, provide detailed requirements, and understand our production capabilities, technical strength, and past project experience.
  Determination of Solution: Both parties reach an agreement on technical details, delivery time, price, etc., forming a preliminary technical proposal and quotation
   
• Contract Signing
  Contract negotiation: After both parties reach an agreement on the technical proposal and quotation, the contract negotiation stage begins, clarifying terms such as delivery time, quality standards, payment methods, and after-sales service.
  Formal signing: Sign a formal procurement contract to ensure the rights and interests of both parties are protected
   
• Final Design and Production Preparation
  Detailed design: According to the contract requirements, carry out detailed design of the power transformer, including drawings and dimensional design of components such as coils, insulation parts, iron cores, and oil tanks.
  Material procurement: Procure high-quality raw materials such as silicon steel, copper/aluminum wires, insulation materials, etc. to ensure product quality.
  Production preparation: Preparation work before production, including equipment debugging, personnel training, production plan formulation, etc

Manufacturing process

• Insulation accessories: Cut the insulation material into required shape and size, perform moisture-proof treatment and other processes.
• Oil tank: Cut steel plates into various parts of the oil tank and oil storage components, and perform welding, rust removal, painting and other processes.
• Iron core production: Stack the silicon steel sheets into an iron core, install a pull plate and shield, and perform iron core testing and other processes.
• Coil production: According to the drawing requirements, select appropriate wire specifications and turns, make the high voltage and low voltage coil Winding, and perform wire welding, insulation, coil testing and other processes
   

Factory Testing

Assembly and testing: Assemble the iron cores, coils, and other insulation components together for semi-finished product testing, body drying, after that, the active parts will be put into oil tank with oil injection, and leakage testing, hot oil circulation, and static discharge will be proceeded.
Finally, perform a factory test, normally routine test and optional type test and special test according to requirements listed in contract to ensure the product performance meets the requirements.

Delivery

Packaging and Transportation: Packaging the product to prevent damage during transportation. Generally, we fix the main body of power transformer in wooden case and for transportation to ensure safe arrival at the destination. For large size main body of power transformers, we have professional solutions for transportation too.

After Sales Service

Our product warranty lasts up to 24 months. After delivering the product to the customer, we will provide necessary technical support of installation guidance. Emails, phone calls, video guide, and on-site guidance are all optional.

Chief Introduction of Power Transformers
 

Definition:A power transformer is a static device that transforms electrical energy between two or more circuits through electromagnetic induction. It consists of two or more coils of insulated wire wound around a core made of magnetic material. The primary coil receives electrical energy at one voltage level, and the secondary coil delivers it at a different voltage level.

Key Components

• Core: Usually made of laminated iron or steel, the core provides a low-reluctance magnetic path for the transformer. It enhances the efficiency of energy transfer by minimizing magnetic flux leakage. 
• Winding: The primary and secondary coils, or Winding, are insulated conductors wound around the core. The number of turns in each winding determines the voltage ratio between the input and output.
• Insulation: To prevent electrical breakdown and ensure the safe operation of the transformer, insulating materials such as oil-impregnated paper, pressboard, and synthetic materials are used.
• Tank: The transformer is housed in a tank filled with insulating oil to dissipate heat generated during operation and to provide additional insulation.
• Functionality: Step-up and Step-down Voltage Transformation:Step-up Transformer: Increases the voltage from the primary winding to the secondary winding.
• Step-down Transformer: Decreases the voltage from the primary winding to the secondary winding.
• Power Transfer: Transforms electrical power at a specific voltage and current level in a way that minimizes energy losses.
• Isolation: Provides electrical isolation between the primary and secondary circuits for safety and to avoid ground loops.

Types of Power Transformers
 

• Distribution Transformers: Used in distribution networks to supply lower voltage to end-users.
• Power Transformers: Used in power transmission systems to step up or step down voltage levels over long distances.
• Instrument Transformers: Designed for use in measuring instruments and protective relays to scale down high voltages and currents.

WinPower operates a 240,000 m² manufacturing base with more than 1,200 employees, including over 180 engineers and technical specialists. Our production and testing capabilities support customized transformer projects subject to approved technical specifications.

Quality Standards Of Product

• Quality management system GB/T 19001-2016 ISO 9001: 2015
  The operation of the whole WinPower system is strictly controlled and managed. This ensures the quality of products and material in all stages, from receiving customer requests to design, materials, production, installation, testing, packaging, delivery, after-sales, all of which operate under strict and logically linked processes.
   
• Certificate of compliance of UL and CUL
  WinPower pad mounted transformer have been evaluated by UL in accordance with the U.S and Canada Standard(s). Our transformer certified by UL based on Canadian standards (CSA standards) .
   
• Accreditation certificate CE
  Standard: EN 60076-1:2011.EN 60076-2:2011EN 60076-14:2013 confirms that WinPower technical quality meets the requirements of all specific international standards for testing and calibration laboratories. All WinPower products are fully tested in a qualified testing room before leaving the factory, ensuring stable quality and providing absolute peace of mind for customers. 
   
• Characteristics of WinPower power transformer
  Cover complete production line of transformer from winding wire, silicon sheet slitting and rolling, transformer oil tank producing and power transformer R&D,testing, installation and production.
   

WinPower automatic insulation wire wrapping line.WinPower has automatic, horizontal, vertical and manual winding lines comes up to different capacity request.
Winding on the primary and secondary Winding has an excellent design structure to help the machine operate effectively.
 

WinPower transformer oil tank casting workshop. Professional work and team for different mold requirements.

WinPower configuration fin/ radiator producing workshop.

Transformer General Technical Parameters 

Transformer Shipping

• WinPower Transformer boasts over 30 years of experience in transformer manufacturing and export, making them highly adept in the intricacies of transformer packaging and transportation.
• In the case of 110 kV 230 kV power transformers, with dimensions exceeding three meters in height and weight surpassing 50 tons, it is common practice to disassemble high-voltage bushings, radiators, fans, and other accessories. Subsequently, the transformer body and these removable components are shipped separately.
• WinPower Transformer employs specialized open-top containers to securely packing the transformer body, while the detachable accessories are meticulously packed in wooden cases, ensuring their safe transport via a separate container.
   

75000 kVA power transformer loading at port

25000 kVA power transformer loading at port

Overseas Project Cases

This 40MVA 110 kV power transformer is manufactured and tested by WinPower, it is shipped to Armenia and installed on site.

This 16000 kVA 110 kV power transformer is operating continuously well in Uzbekistan.