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Types of Power Transformers & Mini Substation for Sale

ZJYB main types of power and distribution transformers are oil immersed power transformer, epoxy resin dry type transformer, combined transformer substation, etc.
Advanced testing and inspection equipment, strict production process and perfect testing and inspection process are the powerful backing of our product quality, and also the confidence source of YUEBIAN distribution power transformers export.
Our distribution and power transformers have passed ISO9001 quality management system certification, product quality in line with IEC60076 international standards and national standards.
  • Oil Immersed Transformer

    The oil insulated distribution is fully oil-filled distribution power transformer. The corrugated fuel tank bright body is a permanently sealed oil tank with its own elasticity to adapt to the expansion of the oil, and has been widely used in various power distribution equipment. The core material is selected from cold-rolled silicon steel sheets.
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  • Dry Type Transformer

    The dry type transformer is called an epoxy resin casting distribution power transformer and uses epoxy resin as an insulating material. The high and low voltage windings are made of copper strip (foil). The epoxy is cast and cured in a vacuum to form a high strength FRP structure. The insulation grade is F and H. Epoxy dry-type transformer has the characteristics of good electrical performance, strong anti-lightning capability, strong short-circuit resistance and light weight. A temperature display controller can be installed to display and control the operating temperature of the transformer windings to ensure the normal life of the transformer.
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Dry Transformer Vs Oil Transformer

COOLING MEDIUM
Dry-type transformers use air as the cooling medium, while oil-filled transformers use oil instead of air.

MAINTENANCE
Generally, oil-filled transformers require maintenance procedures to be performed more often than with dry-type transformers.

PRICE
Oil-filled transformers are generally cheaper than the dry cast resin transformers, with some exceptions.

SOUND OPERATING LEVEL
Transformers are generally known for being noisy when they are running. With that being said, oil insulated transformer are quieter than the dry-type ones.

EFFICIENCY
Oil-filled transformers are known to be more efficient than dry-type transformers, which are limited in their voltage rating and their size.

Mini Substation

The power transformers used in substation includes high-voltage power distribution device, transformer and low-voltage power distribution device. With various substation equipment for sale, we divided them into three functional compartments, namely high-voltage room, transformer room and low-voltage room. The high and low voltage rooms are fully functional, and the high-voltage side primary power supply system can It is arranged in a variety of power supply modes such as ring network power supply, terminal power supply, dual power supply, etc. It can also be equipped with high-voltage metering components to meet the needs of high-voltage metering. The variable pressure chamber can be selected from oil-immersed transformers or dry-type transformers; the low-voltage chamber can be assembled according to user requirements by panel or cabinet-mounted structure, and has power supply and lighting distribution. Various functions such as reactive power compensation, energy metering and power testing meet the different requirements of users. And convenient for the user's power management and improve the quality of power supply.

Difference Between Power Transformer and Distribution Transformer

Power transformers are used in transmission network of higher voltages for step-up and step down application (400 KV, 200 KV, 110 KV, 66 kV, 33KV) and are generally rated above 10MVA.
Distribution transformers are used for lower voltage distribution networks as a means to end user connectivity. (11KV, 6.6 KV, 3.3 KV, 440V, 230V) and are generally rated less than 10 MVA.
Learn more about difference between power and distribution transformer here!


Power Transformer Working Principle

As a one of industry leading China power transformer manufacturer, we have specialty knowledge and skills on distribution power transformers.
A transformer has two or more separate coil windings placed on a common magnetic core. But the primary coil winding is responsible for supplying the alternating current (AC) with supplied frequency and it produces the magnetic flux in the same frequency in the magnetic core. 

Then the flux linkage to the secondary coil winding also changes at the same frequency resulting in induced e.m.f of the same frequency to the secondary coil winding. But the direction of induced e.m.f in the secondary coil winding opposes the causes of producing the alternating flux by the primary coil winding.




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We are a professional distribution transformer factory offering types of oil immersed transformers, dry type transformers, compact transformer substations, etc.

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