Application Of Step Down Transformer

Step down Transformer is to refer to the input end of the higher voltage, converted to the output of a relatively low ideal voltage, so as to achieve the purpose of step-down transformers. The step down transformer is a very important equipment in the electric transformer system, its normal operation is not only related to its safety, the reliable power of the user, but also directly affects the stability of the electric system.



In the electric system, the step down transformer is one of the most important electrical parts, and the relay protection device is an important guarantee for the normal operation of the electric system. With the continuous development of the society, the rapid economic progress, the continuous improvement of living standards, people's demand for electric power has gradually improved, which puts forward higher requirements for the relay protection of step down transformers. For the design of relay protection, we should briefly design the relay protection from its protection principle, specific relay protection measures for transformer faults, and the importance of relay protection these several aspects. The basic principle is the principle of electromagnetic induction. Formula for principle Description: E-- Effective value of inductive potential f-- Frequency N-- The maximum value of the main flux of the turn is due to its differences from the number of winding to the number of the secondary winding, and the magnitude of the inductance E1 and E2 are also different. When the internal resistance pressure drop, the voltage size is different.



When the transformer two sides no-load, one side only passes through the main magnetic flux current, this current is called the magnetizing current.



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If you want to know purpose of a step down transformer and advantages of step down transformer, contact us.

Application of Single Phase Transformer

1. Less material

Single-phase transformers of the same capacity are 20% less iron and 10% less copper than three-phase transformers. Especially when the coil core structure is adopted, the no-load loss of the transformer can be reduced by more than 15%, which will reduce the manufacturing cost and the use cost of the single-phase transformer at the same time, thereby obtaining the optimum life cycle cost.



2. Low line investment

The use of a single-phase power supply system in the grid saves 33% to 63% of the wire. Calculated by economic current density, the wire weight can be saved by 42%. According to the mechanical strength, the wire consumption can be reduced by 66%. Therefore, the construction investment of the entire transmission power can be reduced. This is very meaningful in the lighting of rural areas and towns in China and the electricity consumption of residents.



3. Conducive to modern production

Due to its simple structure, single-phase transformers are suitable for large-scale modern production and are conducive to improving product quality and efficiency. The

application of single-phase transformers

can be flexibly installed on electric poles, which is convenient to go deep into the load center, reduce the power supply nearby, and improve the quality of power supply. Generally, single-phase transformers supply power in a small range, and the fault coverage is small, which is conducive to improving the reliability of power supply. At the same time, because single-phase transformers are lightweight, easy to install and maintain, and flexible to use, they can be used in single-phase or three-phase transformers.

4. Low construction investment



Construction of single-phase power supply systems in light-load areas at the cost of small capacity transformers can reduce construction investment. The transformation of the single-phase power supply system in high-load areas must have a large economic investment. The author sees that some single-phase transformers are piloted in residential areas. The practice is to convert large transformers into multiple small transformers and install them near the load to shorten the distance between the low-voltage trunk line. Since the distance from the power point to the load is constant, the low-voltage is shortened. The power supply distance must inevitably extend the high-voltage power transmission distance. This type of transformation requires a large amount of investment. For example, 30 units in 3 units originally used one 160 kVA three-phase transformer and switched to three 50 kVA single-phase transformers. Table 2 lists The changes in materials and losses of the two transformation schemes have obviously increased construction investment. One

application of single-phase transformers

is to reduce the line loss of low-voltage trunk lines by introducing high-voltage lines into load centers and increasing investment in high-voltage line construction. Second, the no-load loss and load loss after using multiple small-capacity transformers are more than the original single large-capacity transformer. Third, the purchase funds for multiple small-capacity transformers are also greater than the purchase funds for a single large-capacity transformer. Due to the large amount of electricity used by residents abroad, several or each one uses a single-phase transformer because of the wealth of the country and the large amount of capital invested by the power sector.



Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest oil immersed power transformer supplier in China. We provide power transformer, oil transformer and etc. Want to know construction of single phase transformer or more ? Contact us.

Application Of Single Phase Transformer

After the transformation of urban and rural power grid to a certain extent, the share of line loss will be greatly reduced, and the loss of distribution transformer will occupy the main position of network loss. Only when the loss of iron core is greatly reduced can the power loss of the power grid be further reduced. Therefore, the reel core and amorphous core single-phase transformer have great potential for development. At present, the three-phase transformer and the three-phase concentrated power supply system still dominates, and single-phase transformer and the single-phase power supply system is just the supplement. In the practical application of transformer, we should make full use of the advantages and characteristics both of three-phase transformer and single-phase transformer, and choose suitable transformer varieties according to the power load, and configure the power supply with the economic power supply radius.



At present, single-phase transformers are mainly used in residential district electricity consumption, rural lighting or small power consumption, low load density and less load point areas, as well as the residential areas and markets with serious electricity theft. Small industrial users are encouraged to use electricity from the originally integrated transformer to a specific using transformer.



Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest single phase transformer manufacturers in China. We provide power transformer, dry type transformer and etc. Want to know practical applications of transformers or single phase transformer practical? Contact us.



There are many oil immersed transformer suppliers, but we are one of the best choices for you.

Application Of Power Transformer

Application Of Power Transformer



Based on the safe operation of transformer and satisfying users with high-quality and reliable power, the applications of power transformer makes full use of the equipment conditions of substations, selects the operation mode of transformer preferably, reduces the energy loss of the transformers and increases the power factor of the power supply, realizing the target of energy reducing and energy saving and also the economic operation. The power supply load and the determination of the capacity and number of transformers are related to the economic operation mode, while the economic operation of transformer is closely related to the number and capacity of transformers in the substation and the performance and loss parameters of transformers themselves. It is a comprehensive economic and technical activity based on the premise of ensuring safety and reliable power supply, which affects the whole process of power transformer from design selection, operation and maintenance to decommissioning. The related factors and conditions should be taken into consideration in the construction of substations, national construction and the increasing capacity of transformers.



Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest oil immersed distribution transformer suppliers in China. We provide power transformer, electrical transformer and etc. Want to know uses of power transformer or more ? Contact us.

Application Of Instrument Transformer

Application Of Instrument Transformer



The wiring of the instrument transformer shall comply with the connection principle: The first winding should be connected in series with the circuit under test while the second winding in series with all the instrument loads.



Select the appropriate ratio according to the measured current size, otherwise the error will increase. At the same time, the secondary end must be grounded to prevent the primary low-voltage side from channeling into the secondary low-voltage side, causing damaging to people and equipment, when the insulator breaks.



The secondary side is absolutely not allowed to be open, because once the circuit is open, the primary current will transform into magnetized current, causing the sudden increase of M and E2, resulting in excessive saturation and magnetization of the core which may heat severely and burn the coils. When the current transformer works normally, the secondary side is used to connect in series with the current coils, such as measuring instruments and relays. The impedance of the current coil is very small, making the secondary side close to short-circuit.



The installation site of the protection equipment for current transformer shall be the vacancies uncovered by the main protection equipment.



In order to prevent the busbar fault caused by the flashover of the pillar-type current transformer, the current transformers are usually stalled on the outlet of circuit breakers or the side of the transformers.



To reduce the damage of the internal failure of generators, the current transformer used to automatically adjust the excitation device shall be placed on the outlet side of the stator winding of generators. And the current transformer for the measuring instrument should be installed on the neutral point of a generator in order to facilitate the analysis on finding the internal faults before the generator incorporates into the system.



Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest china power transformer manufacturers in China. We provide power transformer, oil immersed transformer and etc. Want to know instrument transformer application or more ? Contact us.

Application Of Core Type Transformer

Core type three phase transformer: the power transformer is divided into core structure and shell structure according to the structure of iron core, and the core of core structure is surrounded by winding.



The structure features of three phase core transformer are that the three phase magnetic circuit is connected together. The magnetic circuit of each phase is used as its own circuit with the other two phase magnetic circuit.



Compared with shell type three phase transformer, it has the advantages of low consumption materials, low price, small occupation area and simple maintenance. Therefore, it is widely used. But in large-capacity giant transformers, three-phase group transformers are often used in order to facilitate transportation and reduce spare capacity.



The core type transformer uses this advantage to be used for high voltage power transformer. For example, the 12 pulse wave rectifying device composed of 3 phase transformer core is a good case. With core type's high reliability, sufficient power supply capacity, sufficient development space, less investment and low operation cost, the power plant upgrading and upgrading of core transformer are provided for chemical plants. The efficiency of electricity consumption is improved and the cost is effectively reduced.



Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest oil immersed transformer manufacturers in China. We provide core type transformer design, oil immersed transformer and etc. Want to know core type transformer advantages or why core type transformer is used for high voltage ? Contact us.



Want to know the details of applications of core type transformer and the core type transformer is generally suitable for, please contact us.

Advantages and Disadvantages of Dry Type Distribution Transformer and Oil-immersed Transformer

Advantages and Disadvantages of Distribution Transformer and Oil-immersed Transformer





In price, dry type distribution transformers are more expensive than oil immersed transformers. In terms of capacity, there are more large-capacity oil immersed transformers than dry type distribution transformers. Dry type distribution transformers shall be used in comprehensive buildings (basements, floors, roof, etc.) and crowded places. The oil-immersed transformer is used in independent substation. The box transformer is generally used in the box transformer.



Oil transformer is generally used for outdoor temporary electricity. In the construction, the selection is based on the size of the space. When the space is large, the oil immersed transformer can be selected. When the space is crowded, the dry transformer can be selected. The regional climate is humid and hot, easy to use oil. In the case of dry distribution transformers, forced air cooling equipment must be provided.



The oil immersed transformer is low cost and easy to maintain, but it is flammable and explosive. Dry type distribution transformers can be installed in the load center to reduce voltage loss and power loss due to their good fire resistance. But the dry type distribution transformer price is high, the volume is big, moisture-proof dustproof is bad, and the noise is big.



In terms of output and consumption, the current voltage grade of dry type distribution transformer is only 35kV, and the capacity is smaller than that of oil-immersed transformer, about 2500kVA. Because dry type distribution transformer manufacturing process is relatively the same voltage level with the capacity of the oil transformer to be complex, the cost is also high. So the amount of oil - immersed transformer or more. However, due to the environmental protection of dry type distribution transformer flame retardant, impact resistance and other advantages, and often used for indoor high demand power supply and distribution places, such as hotels, office buildings, high-rise buildings and so on.



Yuebian Electric Co.,Ltd, approved by ISO9001, is a oil immersed transformer manufacturer in China. We provide power transformer, distribution transformer and etc. Want to know advantages of power transformer and advantages of substation? Contact us.