Power Transformers

Jiangsu Yawei Transformer Co.,Ltd. is one of the leading manufacturers and suppliers of power transformers in China. Please feel free to buy high quality power transformers from our factory. Customized orders are welcome.

Yawei 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 Transformes

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 110KV and 220KV 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 windings, 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.

Windings: The primary and secondary coils, or windings, 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.

Yawei transformer is a professional manufacturer of power transformers for over 30 years. It has more than 50 engineers and technical personnel. More than 1000 employees, covering an area of 240,000 square meters. It can produce both oil-immersed and dry type power transformer. High voltage power transfer, Distribution transformer, Single phase transformer, Three-phase transformer, Pad mounted transformers, pole-mounted transformer. Our machine haved passof UL, EC, IEC,CNAS,SA,IEEE,ISO9001:2000 quality system certification. It can meet IEEE/ANSI/DOE/CSA and IEC standards. transformers have at least two-year warranty. OEM and ODM accepted. Warmly welcomed to check with our factory.

Quality Standards Of Product

Quality management system GB/T 19001-2016 ISO 9001: 2015

The operation of the whole YAWEI 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

YaWei 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 YAWEI technical quality meets the requirements of all specific international standards for testing and calibration laboratories. All YAWEI 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 Yawei 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.

Yawei automatic insulation wire wrapping line.Yawei has automatic, horizontal, vertical and manual winding lines comes up to different capacity request.

Winding on the primary and secondary windings has an excellent design structure to help the machine operate effectively.

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

Yawei configuration fin/ radiator producing workshop.

Yawei transformer front cabinet workshop

Transformer General Technical Parameters

110kv Three-phase duplex winding power transformer on load changer
Rating (kVA)	Voltage Combined		No Load Loss	Load Loss	No Load current	Short-circuit impendance
Rating (kVA)	HV	LV	No Load Loss	Load Loss	No Load current	Short-circuit impendance
6300 kVA	110kV ±8 ×1.25% 115kV ±8 ×1.25%	6.3kv 6.6kv 10.5kv 11kv	10	36	0.8	10.5
8000 kVA			12	45	0.8
10000 kVA			14.2	53	0.74
12500 kVA			16.8	63	0.74
16000 kVA			20.2	77	0.69
20000 kVA			24	93	0.69
25000 kVA			28.4	110	0.64
31500 kVA			33.8	133	0.64
40000 kVA			40.4	156	0.58
50000 kVA			47.8	194	0.58
63000 kVA			56.8	234	0.52

110kv Three phase three winding power transformer on load changer
Rating (kVA)	Voltage Combined			No Load Loss	Load Loss	No Load current
Rating (kVA)	HV(kV)	MV(kV)	LV(kV)	No Load Loss	Load Loss	No Load current
6300 kVA	110kv±8 ×1.25% 115kv±8 ×1.25%	35kv 37kv 38.5kv	6.3kv 6.6kv 10.5kv 11kv	12	47	0.95
8000 kVA				14.4	56	0.95
10000 kVA				17.1	66	0.89
12500 kVA				20.2	78	0.89
16000 kVA				24.2	95	0.84
20000 kVA				28.6	112	0.84
25000 kVA				33.8	133	0.78
31500 kVA				40.2	157	0.78
40000 kVA				48.2	189	0.73
50000 kVA				56.9	225	0.73
63000 kVA				67.7	270	0.67

Transformer Shipping

Yawei 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 110KV 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.

Yawei 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.

75000KVA power transformer loading at port