Power Transformer

Oil immersed power transformer

Product Description:

1. Low partial discharge: The metal and insulation parts inside the device are fully rounded to ensure that the partial discharge is controlled below 100pc, further improving the electrical performance of the product.
2. Strong short-circuit resistance: The product has extremely strong short-circuit tolerance, ensuring no damage in case of sudden short circuit, significantly improving operational reliability.
3. Exquisite appearance: The product has undergone comprehensive polishing and rust removal treatment, and adopts powder electric spraying technology. It is equipped with a wide sheet heat sink to ensure that the coating is long-lasting and does not fade.
4. Leak free design: The sealing element is made of acrylic material, and one-time molding technology ensures that the product will never leak. The equipment undergoes positive and negative pressure leak testing before leaving the factory, ensuring reliable quality.

Product features:

Low loss performance: The no-load loss of the product is reduced by more than 10% compared to the current national standard value, and the load loss is reduced by more than 5%. The overall performance meets and complies with energy efficiency standards.

Low noise design: The noise level is controlled below 60dB in the self cooling state. For users with special needs, customized ultra-low noise transformer solutions can be provided.

High heat dissipation performance: Using high-quality insulation oil and advanced heat dissipation structure design, effectively reducing the operating temperature of the transformer and extending its service life.

High reliability: It has strong short-circuit resistance and environmental resistance, and can operate stably in complex power grids.

5. Strict quality inspection: Transformers must undergo rigorous testing in accordance with national standards GB6450-1986 and IEC 60076 before leaving the factory, including multiple key items such as partial discharge, lightning impulse, noise, etc., to ensure the high quality and reliability of the product.

Main parameters:

1.Rated capacity: 50kVA to 1000MVA

2.Rated voltage: High voltage side 6kV~220kV, low voltage side 0.4-35kV

3.Rated frequency: 50Hz or 60Hz

4.Connection group: commonly referred to as Dyn11 Yyn0、Yd11

5.Insulation level: usually A or F level

Execution standards:

GB 1094 Power Transformers

GB/T 6451 Technical Parameters and Requirements for Oil immersed Power Transformers

GB/T 10228 Technical Parameters and Requirements for Power Transformers

IEC 60354 Load Guide for Transformers

Dry-type power transformers

Product Description:

1. The winding is cast with epoxy resin, which has excellent insulation performance, moisture resistance, and fire resistance, ensuring long-term stable operation.
2. Oil free cooling reduces the risk of fire and has good heat resistance, ensuring stable operation in high temperature environments.
3. It can operate stably in damp and dusty environments, suitable for indoor and outdoor installation, and has good moisture and dust resistance.
4. Strictly control the local discharge during the design process to ensure the long-term stability and reliability of the transformer.
5. Dry design reduces maintenance requirements, lowers long-term operating costs, and reduces reliance on external equipment and materials.

Product features:

1. High overload capacity: It has strong overload bearing capacity and can withstand loads exceeding the rated capacity in a short period of time, adapting to high load conditions.
2. Low partial discharge, low loss: The design of low partial discharge and low energy loss improves the efficiency and reliability of the transformer, reducing energy waste.
3. Fire safety: Non combustible epoxy resin is used to cast the winding, reducing fire hazards, suitable for indoor use, and ensuring safe operation.
4. Moisture and dust prevention: With dry design and excellent packaging technology, it has good moisture and dust resistance and can adapt to harsh environments.
5. Efficient heat dissipation: The efficient heat dissipation design ensures stable operation of the transformer in high temperature environments, extending its service life.
6. High temperature resistance and long service life: It has good heat resistance, and the insulation material has a high temperature resistance level, ensuring long-term stable operation in high temperature environments.
7. Strict quality inspection: Transformers must undergo rigorous testing in accordance with national standards GB6450-1986 and IEC 60076 before leaving the factory, including multiple key items such as partial discharge, lightning impulse, noise, etc., to ensure the high quality and reliability of the product.

Main parameters:

1.Rated capacity: 20 kVA -35000 kVA

2.Rated voltage: 35KV, 10KV, 6KV

3.Overload capacity: The maximum overload capacity is 200% of the rated capacity

4.No load loss: ≤ 0.5% of rated capacity

5.Load loss: ≤ 1.5% of rated capacity

6.Noise level: ≤ 65 dB (based on capacity and design)

7.Working temperature range:- 5 ° C to 40 ° C

Execution standards:

GB/T 10228 Dry type Transformers

IEC 60076 Power Transformers

IEEE C57.12 Transformer Standard

GB/T 6451 Code for Seismic Design of Electrical Equipment

IEC 60726 Tests for dry-type power transformers

GB/T 11022 Low voltage distribution equipment and control equipment

Our technological advantages:

1. Shanghai Zhiyou International's leading R&D technology cloud platform

Integrating electromagnetic optimization design, parametric drawing, performance analysis and structural optimization, automatic drawing, and other functions of transformers to achieve resource sharing in transformer design, as well as searching, modifying, and version control of various data information.

2. Simulation analysis

The current field, temperature field, electric field, leakage magnetic field, wave process, and short-circuit force of transformers. The research and design of each series of products are carried out through simulation analysis of flow and temperature fields to determine the average temperature rise of the coil and the hot spot temperature seat, ensuring product performance.

3. Smart operation and maintenance platform

By collecting key data such as temperature, current, voltage, vibration, and grid harmonics of transformers, online power quality analysis, fault alarms, and installation on mobile phones can be achieved.

Ordering Notice:

1. Please provide detailed parameters of the product.
2. Please provide us with as much product related information as possible regarding the product specifications, product drawings, product nameplates, product photos, etc. that you need to order, so that we can provide you with a faster and more accurate quotation.
3. Please provide the product specifications, product drawings, product nameplates, product photos, etc. that you need to order, send email to: shanghaizhiyou@gmail.com We will reply as soon as we receive the email.
4. You can also quickly contact our sales manager Yang through the following contact information: WeChat：+ 86 13122066665 or WhatsApp:+ 86 189 3091 2328.

We are willing to serve you with our professionalism, sincerity, and integrity.

Product Advantages

• Industry-Leading Manufacturing Capabilities
  With over 18 years of experience, ZHIYOU has grown into one of China’s most trusted transformers suppliers and electrical transformers manufacturers, delivering reliable quality and scalable production.

• Trusted by Global Transformers Companies
  We are proud to be among the go-to transformers companies for EPC contractors, utilities, and industrial firms looking for dependable power distribution solutions.

• Certified & Compliant Production
  As certified manufacturers of transformers, we ensure every product meets ISO 9001 and ISO 14001 standards, with full routine testing conducted before delivery.

• Flexible and Customizable Options
  As a customer-centric power transformers manufacturer, we provide flexible configurations including step-up/step-down, single-phase/three-phase, and air/oil-cooled systems.

• Export-Oriented Supply Chain
  Recognized among top transformers suppliers, we deliver bulk and OEM orders worldwide with competitive lead times and transformer prices.

About Us

Shanghai Zhiyou Electric Manufacturing Co., Ltd. is a leading manufacturer of power transformers, reactors, resistors, and complete electrical equipment, serving a diverse range of industries worldwide.

Core Manufacturing Capabilities and Quality Assurance

• Product Range: We specialize in power transformers, reactors, resistors, and related electrical equipment.​
• Certifications: Our company has obtained ISO 9001 international quality management system certification and ISO 14001 international environmental management system certification.​
• Quality Control: All products undergo testing and certification by authoritative institutions, ensuring compliance with or exceeding national and international standards.​

Production Strength

Global Reach: Our products are exported to 86 countries and regions, including North America, South America, Europe, Southeast Asia, the Middle East, and Africa.​

Sustainability Initiatives

Environmental Commitment: We adhere to ISO 14001 environmental management standards, reflecting our dedication to sustainable manufacturing practices.​

Customer Collaboration Process

• Inquiry: Clients reach out with specific requirements or questions.​
• Consultation: Our team provides detailed information, technical support, and guidance.​
• Quotation: A comprehensive proposal is presented, tailored to the client's needs.​
• Customization: Products are designed or adjusted according to client specifications.​
• Manufacturing: Production is carried out with strict quality control measures.​
• Delivery: Timely shipping arrangements are made, ensuring safe and prompt arrival.​
• After-Sales Support: Continuous assistance is available to address any post-delivery concerns.​

Global Service Capability

Based in Shanghai, China's economic hub, we leverage our strategic location to offer efficient and reliable services to clients worldwide. Our international certifications and extensive export experience underscore our commitment to global standards and customer satisfaction.​

Partner with Shanghai Zhiyou Electric Manufacturing Co., Ltd. to experience excellence in electrical solutions tailored to your needs.

FAQ

Who are we?

We are Shanghai Zhiyou Electric Manufacturing Co., Ltd., a factory established in 2007, specializing in the production of power transformers, reactors, resistors, and complete electrical equipment. Our factory is located in Shanghai, China.​

How can we guarantee quality?

We have obtained ISO 9001 international quality management system certification and ISO 14001 international environmental management system certification. All products undergo testing and certification by authoritative institutions, ensuring compliance with or exceeding national and international standards.​

What can you buy from us?

Our product range includes:​

• Power transformers​
• Reactors​
• Complete electrical equipment​
• shanghai-electric.com

Why should you buy from us and not from other suppliers?

With over 18 years of manufacturing and R&D experience, we offer high-quality products at competitive prices. Our products have been exported to 86 countries and regions, and we have established a reputation for reliability and excellence.​

What services can we provide?

We offer comprehensive services, including:​

• Product customization​
• Goodreads
• OEM and ODM services​
• Technical support​
• After-sales service