Advanced Power Transformer Factory in China

To get a customized solution and factory direct price of high quality Power Transformer, you can choose Yibaling as your supplier. We offer comprehensive services both pre-sale and after-sale, for technical support, just contact us without hesitation.

Company Profile

Zhejiang Yibaling Power Equipment Co., Ltd. is a professional manufacturer of transformers and voltage regulators. It can produce isolation transformers, power transformers, and automatic voltage regulators. Its products comply with the national compulsory product certification (CCC), the EU CE safety certification, and the ISO9001 quality management system certification standards. In addition, we have over 3 years of experience in manufacturing transformers and voltage regulators for export. Yibaling transformers enjoy a warranty period of at least 2 years. ODM and OEM services are also available.
Yibaling's factory has over 10 engineers and technicians and a staff of over 60 people. The factory covers a complete production line from winding, silicon steel sheet cutting to transformer manufacturing.

Why Choose Us？

1. High Quality

Our Yibaling factory is renowned for its diverse product lines and strict quality control throughout the entire process (from the selection of raw materials to the meticulous production procedures and to the delivery of high-quality products).

2. Professional Team

Our company also has a professional team consisting of over 10 engineers and technical personnel, as well as a basic force of over 60 employees, which can cover every aspect from design to production and delivery.

3. Support ODM/OEM

We fully support the in-depth cooperation between ODM and OEM. Whether you need to brand standard products that are compatible with existing systems, or conduct new design and development from concept to finished product, our professional team can work closely with you.

4. Support Customization

We fully understand that standard products may sometimes not fully meet the unique requirements of your project. We are more than willing to offer you a precise solution through customized methods.

What is an electric transformer?

An electric transformer is a device that converts electrical energy through electromagnetic induction between two or more circuits. It consists of two or more windings. The primary winding receives electrical energy at one voltage level, and the secondary winding transmits electrical energy at a different voltage level.

Main components

Core: The core is typically made of silicon steel sheets, providing a low-resistance magnetic path for the transformer. It minimizes magnetic leakage, improving the efficiency of energy transfer.
Windings: The primary winding and secondary winding or coils are the insulated conductors of the core. The number of turns in each winding determines the voltage ratio between the input and output.

Function

Voltage boosting and voltage reducing conversion: A boosting transformer increases the voltage from the primary winding to the secondary winding; a reducing transformer reduces the voltage from the primary winding to the secondary winding.
Power transmission: Converts electrical power at specific voltage and current levels in a way that minimizes energy loss.
Isolation: Provides electrical isolation between the primary and secondary circuits, ensuring safety and avoiding ground loops.

How does a power transformer work?

The Yibaling power transformer is like an "intelligent gearbox" for the power system. Its core function is to change the voltage level of alternating current in a quiet and efficient manner. It has no moving parts inside and mainly achieves "electricity transmission through the air" by relying on a silicon steel sheet stack forming the iron core and two sets of insulated coils (primary and secondary) wound around it.
When alternating current is fed into the primary coil, a constantly changing magnetic field is generated. This magnetic field is firmly constrained by the iron core and transmitted to the secondary coil. The changing magnetic field acts like an invisible hand, "inducing" a new voltage in the secondary coil.
Whether the voltage rises or falls entirely depends on the "turn ratio" of the two coils - if the secondary coil has more turns than the primary coil, the voltage will increase; conversely, the voltage will decrease. The entire process follows the law of conservation of energy, so when the voltage increases, the current will decrease proportionally (beneficial for long-distance power transmission to reduce losses), and when the voltage decreases, the current will increase (to meet the electricity demand at the end user).
Because it operates based on "changing magnetic fields", transformers can only use alternating current. From raising the voltage from the power plant to tens of thousands of volts for transmission, to reducing it step by step at the substation to several thousand volts, and finally converting it to the 220-volt socket on your home wall, transformers play a crucial role at every stage of the power journey, silently ensuring that electricity reaches every place that needs it in the most economical and safe way.

Classification of Power Transformers

Classifying power transformers yields different results depending on the classification method. Based on cooling methods, they can be primarily divided into two categories: oil-immersed transformers and dry-type transformers.
Oil-immersed transformers primarily rely on liquid cooling. Their cores and windings are immersed in insulating oil, which dissipates heat through convection and radiation. Oil-immersed transformers offer superior heat dissipation and high capacity, making them the primary type used in outdoor substations. Common variants include oil-immersed self-cooled (ONAN), oil-immersed air-cooled (ONAF), and forced oil-circulation air/water-cooled (OFAF/OFWF).
Dry-type transformers, however, do not utilize liquid cooling. Their cores and windings are encapsulated in solid insulating materials such as air or epoxy resin, relying on air convection for heat dissipation. Compared to oil-immersed transformers, dry-type units offer advantages including fire resistance, explosion protection, and pollution-free operation. They are well-suited for indoor installations, such as distribution rooms in high-rise buildings, high-traffic shopping malls, hospitals, and similar environments.

How to maintain the power transformers？

1. Body Cleaning and Appearance Condition Inspection

Customers need to use dry and clean tools to remove the accumulated dust on the transformer's shell, heat dissipation channels, and low-voltage porcelain bushings to maintain overall cleanliness, which is conducive to heat dissipation and easy observation. After cleaning, please focus on checking for rust, deformation, or abnormal overheating marks on the shell; at the same time, carefully inspect all gaskets, seals, and porcelain bushings to ensure there are no cracks, damages, creepage traces (black discharge marks), or aging (such as hardening or cracking of rubber gaskets), and observe whether there are any deformations, looseness, discoloration (usually caused by overheating), or arc burn marks at the cable terminal heads and busbar connection points on both the high and low voltage sides. Any minor abnormalities should be recorded and evaluated, and timely arrangements should be made for handling.

2. Electrical Connection and Insulation Condition Inspection

The reliability of electrical connections is directly related to operational safety. Under the condition of power-off and taking appropriate safety measures, the contact surfaces between the busbar and transformer terminals, as well as between busbars, should be inspected to ensure they are smooth and free of oxidation layers or carbonized impurities. Ground resistance should also be measured using a ground resistance tester to ensure it meets the requirements of the regulations (typically no more than 4Ω), which is the fundamental guarantee against electric shock and overvoltage damage to equipment.

3. Operating Environment and Ancillary Facilities Inspection

The healthy operation of the transformer depends on a good environment. It is necessary to check whether the ventilation facilities in the transformer room (such as fans and louvers) are operating normally and whether the passages are unobstructed to ensure that the heat dissipation conditions meet the requirements. At the same time, verify whether the nearby fire-fighting facilities (such as gas fire extinguishers and temperature and smoke detectors) are within their validity period and in good working condition, and remove any debris or flammable materials around and inside the transformer room to keep the safety passages clear.

Safety precautions during transformer maintenance

1. Insulation resistance testing requires two people
2. Do not touch the transformer before it is completely discharged
3. Maintenance operators must wear insulating suits; otherwise, they cannot operate
4. During maintenance, other personnel should be evacuated to prevent the transformer from being accidentally touched and opened

Request a Quote for a Power Transformer for Your Business Today

At Yibaling Factory, we aim to help you save costs by providing the highest quality products and services. Our transformers are made of premium materials and have been enhanced in durability throughout all design processes. In the long run, maintenance costs are reduced.
If you need a transformer to stabilize your circuit in order to optimize your business performance and efficiency, please call +86-13576354577 to contact us or send an email (lassie@cnybldy.com) to get in touch with us.