Three Phase Industrial Oil Transformer
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Three Phase Industrial Oil Transformer

DAYA electrical is a large-scale Three Phase Industrial Oil Transformer manufacturer and supplier in China. We have been specialized in High voltage equipment for many years.Oil immersed transformers are used in power distribution or substations. Their cores and coils are immersed in oil to cool and insulate them. The oil circulates through the pipes in the coil and the pipes around the coil and core assembly, moving by convection. Our products have a good price advantage and cover most of the South America, Middle East, Africa, Southeast Asia markets. the majority of power users and design units, which meets national conditions, has high technical performance indicators, and can adapt to electricity market development.We look forward to becoming your long-term partner in China.

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Product Description

DAYA Three Phase Industrial Oil Transformer Details

Three-phase transformers can be categorized depending on their construction. There are two types of 3-phase transformers: the core-type with primary and secondary windings wound on one core and the shell-type transformer that combines three 1-phase transformers. In core-type three-phase transformers, the core has three limbs within the same plane.

To make a three-phase transformer calculation, you need to know the units involved. VA represents Volts-amperes while kVA represents kilovolts-amperes. These units are the sizing reference for every transformer and represent the apparent power of the device. Apparent power is different from absolute power or real power represented by Watts.

DAYA Three Phase Industrial Oil TransformerCharacteristics

A three-phase transformer works like a three-set iron core. Each set has its primary and secondary winding, where most of the power dispersed is in three-phase AC. A three-phase transformer is a self-contained and mostly static device operating in AC.

In power generation, the generator produces electricity by rotating three coils or windings within a magnetic field. Three-phase transformers almost work the same way. They have coils or windings spaced 120 degrees apart called “Delta” or “Wye” connections. However, instead of generating power, transformers simply convert the voltage that passes through them.

Every three-phase system has three coils or windings. These coils, when placed in the proper sequence, allow matching of voltages on desired ratings. There are plenty of advantages the three-phase transformer has over its single-phase counterpart. Below are the most notable ones:


Less expensive. A three-phase transformer is less expensive than three single-phase transformers of the same rating.


More compact

Easy to install and assemble

Higher efficiency and rating performance

You can get a single-phase power supply from a three-phase power supply. Meanwhile, it is impossible, for vice versa, to get a three-phase power supply from a single phase.


However, there are also situations wherein a three-phase transformer is not practical. Among the disadvantages of three-phase transformers are:

Expensive maintenance and repair

If a three-phase transformer fails mid-way, all adjacent load areas shut down. The whole three coils shut down until repair.

A failed winding in a three-phase transformer requires a complete repair or replacement. Meanwhile, in the case of a single-phase transformer, only the faulty ones need replacement.

DAYAThree Phase Industrial Oil TransformerProfessional Service 

Pre-Sales Service: 

provide design consulting service in accordance with customer requirements, and provide separate design scheme according to different customer markets to make products more competitive.

After Sales Service: 

• We can provide on-site installation instructions, commissioning and after sales service. (Fee-for-service)

• You will get free lifelong technical advice from our highly qualified engineers. This will give you a lot of confidence when buying from our company.

• We guarantee the ongoing supply and preferential prices for spare and wearing parts.

• Our highly qualified team of service technicians are well equipped to keep your transformer operating at high efficience at all times.


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