Distribution Transformer
zELECT：Your Professional Distribution Transformer manufacturer!
Baoding Zhongyi Electric Corporation. Here in short referred to as "ZELECT", located in Baoding city, Hebei province, China. Founded in 2008, our company is one of the "high-tech enterprises", which produce and sell power transformer, high and low voltage switch-gear and prefabricated substations.
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Advanced Equipment
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24H Online Service
Your inquiry will be replied within 24 hours.We also provide customized service and the perfect power solution to meet your requirements.
advanced equipment
We have many very advanced and complete production equipment to ensure the excellent quality of our products
professional team
There are currently 260 employees, including 18 technicians who have been engaged in the research and development of transformer products for many years, and 8 high-quality corporate managers.
global shipping
Our sales network is divided to five main regions: America, Southeast Asia, West&South Asia, Europe&Africa, Russian Market.
A distribution transformer provides the final voltage transformation in the electric power distribution system, stepping down or up the voltage used in the distribution lines to the level used by the customer in their home, businesses, and commercial buildings.
There are various forms of transformers available in the distribution system, such as single-phase, three-phase, pad-mounted, and pole-mounted distribution transformers. These transformers are available in various sizes, insulating oil and efficiencies, to suit project requirements and budgets.
Benefits of Distribution Transformer
High Efficiency and Easy Installation:
Our transformers are designed to be highly efficient, with low losses and high performance ratings.designed for easy installation and operation, with user-friendly features and simple controls.
01
Reliable Performance:
Our transformers are built with high-quality materials and workmanship, ensuring reliable performance even under heavy loads.
02
Low Maintenance:
Our transformers require minimal maintenance, reducing downtime and operational costs.
03
Robust Design:
Our transformers are built to withstand harsh environmental conditions, with weatherproof and dust-protected enclosures.
04
Easy Installation:
Our transformers are designed for easy installation and operation, with user-friendly features and simple controls.
05
What are Advantages of Distribution Transformer
(1) The no-load loss of the amorphous alloy transformer is reduced by more than 65% compared with the S11 transformer, the no-load current is reduced by about 80%, and the annual operating cost is reduced by an average of 22.7%.
(2) The transformer has no structural loss, and the iron core adopts a three-phase four-frame five-column structure. The zero-sequence magnetic flux flows in the two side columns, and the magnetic flux does not pass through the box, so no heating structure loss occurs.
(3) The transformer connection group adopts Dyn11 to reduce the influence of harmonics on the power grid and improve the quality of power supply.
(4) The low-voltage winding of the transformer adopts a copper foil coil, and the coil is a rounded rectangle.
(5) The structure of the transformer body adopts "upper support and lower support" to reduce the stress on the iron core as much as possible and ensure the electromagnetic performance of the amorphous alloy iron core.
(6) The suit of the small-capacity transformer adopts the vertical suit technology, and the suit of the large-capacity transformer adopts the horizontal suit technology, and the noise and no-load loss of the transformer are strictly controlled.
(7) The transformer box adopts a fully enclosed structure. The box is filled with silicone oil with good anti-oxidation, high temperature resistance and thermal cycle performance, and the transformer is basically in a maintenance-free state.
(8) The transformer adopts vacuum oil injection to completely eliminate the air bubbles in the coil and ensure the stability of the insulation performance.
(9) A protective cover is installed above the high and low voltage bushings of the transformer, no conductors are exposed, and cable wiring is used to achieve full insulation protection.
Distribution Transformer Construction
The modeling of a distribution transformer can be performed similarly to the small size types. The main components of this transformer mainly include conservator, oil tank, breather unit, gas relay, oil indicator, pressure relief device, temperature detector, radiator, thermal relay, and bushing.
The oil tank is employed to soak the winding by placing them in.
A conservator is installed above the oil tank at the outside of the transformer unit. It is attached to the basic tank by using a metallic tube. The oil through the tank can be simply contacted and enlarge all overloading so that the temperature of the oil can be decreased or increased.
Gas relay is applied when a conservator tank is performed since it monitors errors like a waste of oil when it goes low, improper moving of oil between the transformer and tank.
A Breather set consists of silica gel that absorbs the humidity of the oil. It modifies its color from blue to pink.
The oil indicator determines the rate of the oil through the conservatory unit.
The temperature detector identifies the oil temperature. If the oil temperature increases to a particular level, then the device will be disconnected from the system.
The pressure relief part reduces the pressure through the transformer to prevent an explosion of the device.
A thermal relay is employed as an indicator for the winding temperature.
The radiator is applied to improve the transformer’s cooling efficiency.
The bushing is utilized to connect the internal sections of the transformer using an exterior electrical network.
Types of Distribution Transformer
Based on the application or requirement, these transformers are categorized into different types like single phase, three phases, underground, pad-mounted, pole-mounted transformers.
Single Phase
These transformers are specially used for networks wherever a three-phase supply is not required. Usually, these are used for repairing overhead distribution loads in residential. These are also applicable in industrial lighting, light commercial loads & power applications.
Three Phase
This kind of transformer is used to hold electrical energy from the main distribution circuit to a minor distribution circuit. This type of transformer transmits the current to a secondary distribution circuit and also reduces the voltage of the primary distribution circuit. These transformers reduce the voltage supply for the primary circuit based on the consumer requirement.
This voltage always changes & can be dissimilar for the users of commercial, residential & light industry. These transformers work on different levels of voltage & frequency based on the standards existing in different countries. These transformers are available in single-phase & three phases. Single-phase is used in residential applications whereas 3-phase with a pad is used in underground primary circuits.
Pole Mounted
These transformers are mounted on an electrical service pole at the height of the overhead cables. These are used for changing high distribution voltage to low like 120/240 volt power. These types of transformers are used in a wide rural area, ranges from 16 kVA to 100kVA. These are available in small size and easy to fit on single-pole structures. These transformers are reliable to harsh climates when they used in remote areas.
Tanks of the transformer can be shaped and protected from the corrosive materials & accumulation of water. In coastal areas, tanks can be protected from zinc sprays whereas, in highly corrosive regions, stainless tanks are used.
Pad-Mounted
This type of transformer includes a locked steel cupboard that is arranged on a concrete pad. This type of transformer is installed in places where they do not have space for a fenced enclosure. This transformer is used with electric power distribution lines at an overhead electrical line for reducing the primary voltage to supply for the customers. A single transformer of this type can serve many homes/a large building. The power rating of this transformer ranges from 75 kVA to 5000 kVA and includes fixed switches & fuses.
What is a Distribution Transformer Design?
The distribution transformer has four parts: The Input Connection, the Output Connection, the Winding or Coils, and the Core.
a. Input Connections
Input Connections are also called the primary side because electricity goes into the transformer; it has to be connected to this site.
b. Output Connections
The output side has another name, which is the secondary side of the transformer. On that side, electrical power is sent to the electric device in your house or factories. Usually, the voltage in the transformer's output side (or secondary side) is lower than in the primary side.
One of the main differences between power transformer and distribution transformer is that a power transformer usually has one primary and one secondary or one input and output setup. A distribution transformer may have one primary and two or more secondaries, depend on the purpose.
c. Winding
All types of transformers have two winding, and the distribution transformer is the same. It is divided into the primary and the secondary winding. The primary one has a function of drawing power from the source. The secondary winding transfers electric power to electrical equipment.
d. Core
The transformer core provides a path that controls the magnetic flux created in the transformer. Typically, the core is not a solid bar of steel. It includes many laminated steel sheets, or layers folded neatly. This design is to eliminate or decrease heating.
The transformer's cores have two types used according to your demand: Core Type and Shell Type. The main difference of these types is how the primary and secondary coils folded around the steel core.
Core type - The winding are wrapped in the laminated core.
Shell type -The laminated core wraps the winding.
When the input voltage gets into the primary winding, alternating current starts to flow in this winding. As the current goes through it, a continuously changing and alternating flux is created in the transformer's core. When this magnetic field runs across the secondary winding, a new alternating voltage is formed in that one.
The main manor to determine the transformer types and the output voltage is the ratio of actual turns of wire in each coil. Say the number of turns of the primary and secondary winding is N1 and N2, the voltage in the two winding call U1 and U2; we have a formula: N1/N2 = U1/U2
If the output winding voltage is higher than the input voltage, then the secondary winding has more wire turns than the primary one. So, the output voltage increased higher, also called "a step-up transformer." Whereas, if the output voltage is less than the input voltage, it's called "a step-down transformer. Usually, a distribution transformer is also a step-down transformer.
Our Factory
Our factory covers an area of 33,300 square meters, with a total construction area of 6,100 square meters. There are currently 260 employees, including 18 technicians who have been engaged in the research and development of transformer products for many years, and 8 high-quality corporate managers. With the expansion of production scale and the increase of product varieties, it has now developed into a high-tech innovative enterprise that annual production capacity of more than 1000MVA, integrating the design, production and sales of open-type dry-type transformers, epoxy resin cast dry-type transformers, amorphous alloy transformers, and special transformers.
Our Certificate
Our company has passed the ISO9001-2008 international standard quality management system certification. All performance indicators of the products have reached the relevant national standards and international standards.
The oil immersed power transformers and dry-type transformers have passed the Test Report of the National Supervision and Inspection Center for Energy-saving Product Quality; Complete sets of low voltage switch-gear (GGD2) (GCK) has passed the test of China Compulsion Certification (CCC) from the State Bureau of Quality and Technical Supervision for Electrical Products; Indoor AC draw-out type metal clad switch-gear KYN28A-12 / 1250-31.5, fixed AC metal-enclosed Ring unit XGN15-12 / 1250-31.5 and XGN15 metal-enclosed switch-gears have passed the test of the National Quality Supervision and Inspection center for High-voltage Electrical Appliances Product.
FAQ
Q: Which transformer is used in an electrical distribution system?
Q: What is the difference between distribution & power transformer?
Q: What are the types of transformers?
Q: Why transformers are rated in kVA?
Q: What is the formula for kW to kVA?
Q: What makes distribution transformers effective?
Q: What is the main function of distribution transformer?
Q: How do I choose a distribution transformer?
Q: Where should distribution transformers be installed?
Q: How do you protect a distribution transformer?
Q: What is the application of distribution transformer?
Q: What are the hazards of distribution transformers?
Q: What happens when a distribution transformer fails?
Q: What are various safety devices in the distribution transformer?
Q: What impact does unbalance have on distribution transformers?
Q: How long do distribution transformers last?
Q: How do you know if a transformer is overloaded?
Q: What are the effects of harmonics on distribution transformers?
Q: What is the purpose of step-down transformer at distribution level?
Q: How do you test a transformer for no load?
We're known as one of the most professional distribution transformer manufacturers and suppliers in China. Please rest assured to buy high quality distribution transformer for sale here from our factory. Good service and competitive price are available.
630kva transformer, industrial power transformer, 100 kva 3 phase transformer