Established in 2008, GNEE Electrical Group Co., Ltd. is an enterprise specializing in the production and processing of transformer products. The main product includes dry type transformer, oil immersed transformer, power transformer, pole mounted transformer and pad mounted transformers. We have exported steel to over 150 countries and collaborate with more than 600 companies worldwide.
The company is mainly engaged in the production of epoxy resin dry-type transformers, three-dimensional triangular wound core transformers, power transformers and intermediate frequency furnace transformers. Products include SCB10, SCB12, SCB13, SCB14, SCB18, S11-M, S13-M, S13-MRL, S20 and S22 series distribution transformers.
01
Strong Production Ability
The company possess a factory covering over 35000 square meters and more than 200 employees. Our annual export capacity exceeds 80,000 metric tons. We offer a diverse product line in the market and can export the products swiftly and safely to a variety of different locations.
02
One-stop Solution
Our capabilities range from customized materials solutions to materials-related services. We offer sales, purchasing, research and development, and designing services of silicon steel products to meet various requirements of customers worldwide.
03
High Quality
Integrated factory strength to support all kinds of tape customization,with paper base,cloth base,glue,coating all raw material production capacity
04
Wide Range of Application
Our products are widely used in field of automotive production, packaging and containers, construction and infrastructure, agriculture, renewable energy, electrical industry etc.
What Is Dry Type Transformer
A dry type transformer is defined as a transformer that does not use any liquid as an insulating or cooling medium for its windings or core. Instead, the windings and core are enclosed in a sealed tank that is filled with air or gas under pressure.
Dry type transformers are widely used in various industries and applications because of their safety, reliability, and environmental benefits. They can operate in harsh conditions such as high humidity, fire risk, and seismic events without compromising their performance or posing any hazard to people or property.
Common Types of Dry Type Transformers
Step-Up Dry Type Transformers
These transformers increase the voltage of an electrical current. They are often used in power transmission systems to boost the voltage of electrical power before it is transmitted over long distances.
Step-Down Dry Type Transformers
These transformers reduce the voltage of an electrical current. They are commonly used in power distribution systems to lower the voltage of electrical power before it is distributed to homes and businesses.
Three-Phase Dry Type Transformers
These transformers are used to transform three-phase electrical power, which is commonly used in industrial and commercial settings. They can be either step-up or step-down transformers.
Auto-Dry Type Transformers
These transformers have only one winding, which is partially common to both the primary and secondary circuits. They are used to change the voltage of an electrical current but with fewer components than a standard transformer.
Dry-Type Transformers
These transformers do not use oil for cooling and insulation. They are typically used in indoor applications where the risk of fire is a concern.
Oil-Filled Dry Type Transformers
These transformers use oil for cooling and insulation. They are typically used in outdoor or underground applications where the risk of fire is not a concern.
dry type transformer Structural characteristics
temperature control system
The safe operation and service life of a dry-type transformer largely depend on the safety and reliability of the transformer winding insulation.
cooling method
Dry-type transformer cooling methods are divided into natural air cooling (AN) and forced air cooling (AF). When naturally air-cooled, the transformer can operate continuously for a long time at rated capacity. When forced air cooling is used, the output capacity of the transformer can be increased by 50%. It is suitable for intermittent overload operation or emergency overload operation; because the load loss and impedance voltage increase greatly during overload, it is in a non-economic operating state, so it should not be placed in long-term continuous overload operation.
Features Of Dry Type Transformer
1. Safe, fireproof, non-polluting, and can be run directly in the load center;
2. Adopting domestic advanced technology, it has high mechanical strength, strong short-circuit resistance, small partial discharge, good thermal stability, high reliability and long service life;
3. Low loss, low noise, obvious energy saving effect, maintenance-free;
4. Good heat dissipation performance, strong overload capacity, and can increase capacity operation when forced air cooling;
5. Good moisture-proof performance, suitable for operation in high humidity and other harsh environments;
6. Dry-type transformers can be equipped with complete temperature detection and protection systems. Adopting an intelligent signal temperature control system, it can automatically detect and display the respective operating temperatures of the three-phase windings. It can automatically start and stop the fan, and has alarm, trip and other function settings;
7. Small size, light weight, less space occupied and low installation cost.
Advantages of Dry Type Transformers
They are safe for people and property because they do not contain any flammable or toxic liquid that can leak or catch fire.
They are maintenance-free and pollution-free because they do not require any oil changes, oil tests, oil spills cleanup, or special disposal methods.
They are easy to install because they do not require any vaults or special foundations. They can be placed close to the load to reduce the need for long and costly low voltage cables.
They are environmentally friendly because they do not emit any harmful gases or contribute to the greenhouse effect.
They have an excellent capacity to support overloads because they have better heat dissipation and thermal endurance than oil-filled transformers.
They have reduced costs on civil installation works and fire protection systems because they do not need any oil containment pits, fire walls, fire extinguishers, or sprinklers.
They have excellent performance in the case of seismic events because they have a rigid structure that can withstand vibrations and shocks.
They have no fire hazard because they have self-extinguishing properties and do not produce any smoke or flames in case of faults.
They have excellent resistance to short-circuit currents because they have low impedance and high mechanical strength.
They are long-lasting due to low thermal and dielectric heating because they have high-quality insulation materials that can withstand high temperatures without degrading.
Disadvantages of dry type transformer
Some of the main disadvantages of dry-type transformers are:
They are more expensive than oil-filled transformers for the same power and voltage rating because they require more materials and labor for manufacturing.
They are larger and heavier than oil-filled transformers for the same power and voltage rating because they have more air gaps and insulation thickness.
They are more sensitive to dust, dirt, and vermin because they have open ventilation that can allow the entry of foreign particles that can damage the windings or cause short circuits.
They are noisier than oil-filled transformers because they have higher magnetostriction and vibration that can produce audible sounds.
Application of Dry Type Transformers
Dry-type transformers are used to supply power to various equipment and processes that involve flammable or explosive substances, such as refineries, petrochemical plants, pipelines, offshore platforms, etc.
Dry-type transformers are used to protect the environment from oil spills or leaks that can contaminate water sources, soil, or wildlife habitats, such as water protection areas, forests, wetlands, etc.
Dry-type transformers are used to prevent fire hazards or minimize fire damage in areas that are prone to fire outbreaks or have strict fire regulations, such as indoor substations, underground substations, hospitals, schools, hotels, shopping malls, etc.
Dry-type transformers are used to connect renewable energy sources to the grid or to the load, such as wind turbines, solar panels, hydroelectric plants, etc.
Dry-type transformers are also used in other applications that require high performance, low maintenance, or special features, such as traction systems, marine systems, mining systems, data centers, etc.
How To Commission The Dry-Type Transformer?
(1) Before sending power to the dry-type transformer, it is necessary to check whether the electrical connection conforms to the specification standard and whether the safety distance of each part conforms to the standard provisions. The interior of the transformer should be cleaned without dust.
(2) transformer ratio and connection group are appropriate, and DC resistance measurement of the winding, if necessary, dry processing.
(3) The voltage ratio, transformer group, and polarity of all tap-heads of the winding.
(4) AC withstand voltage test of the winding.
(5) Temperature controller, fan, and other ancillary devices such as inspection.
Products display
Dry-type transformers should meet the following requirements:
Require 01
When the transformer and the low-voltage distribution cabinet are installed in parallel, the protection level of the shell is not lower than IP3X, and when installed separately, the protection level is not lower than IP2X;
Require 02
There are no traces of spark discharge on the surface of the iron core and casing;
Require 03
There is no damage or cracks on the outside of the casing and insulator;
Require 04
The transformer winding cast body is free of cracks and dirt;
Require 05
There is no serious contamination on the surface of the iron core or casing;
Require 06
The transformer sound is normal.
GNEE Transformer Factory
Our have strong R&D team and they have more than 16 years of transformer design experience and are familiar with lots of international transformer standards, such as IEC, IEEE / ANSI,CSA, etc. and instruments with more than 16 years'experience.Excellent and stable quality with best cost performance.Various payment term available.
Customer Vist
FAQ
Q: What's the Efficiency of Dry Type Transformers?
Q: What is a 1000 KVA Dry Type Transformer?
Q: What is the 2000 KVA Dry Type Transformer Price?
Q: What is a 2000 KVA Dry Type Transformer?
Q: What is a Three-Phase Dry-Type Transformer?
Q: What is a 33KV Dry Type Transformer?
Q: What is a 500 KVA Dry Type Transformer?
Q: What is a dry transformer?
Q: What is a dry type current transformer?
Q: What is inside dry type transformer?
Q: What is the difference between a dry and oil type transformer?
Henan Gnee New Material Co., ltd. is well-known as one of the leading dry type transformer manufacturers and suppliers in China. If you're going to buy customized dry type transformer made in China, welcome to get pricelist from our factory. Quality products and low price are available.
800 KVAencapsulated dry type transformer, 1000 KVA cast coil dry type transformer, 11kv dry transformer