Step up transformer increase the low primary voltage to a high secondary voltage. Again it is achieved by the ratio of primary and secondary winding ratio. For the Step Up transformer, the ratio of the primary winding and the Secondary winding remains less than 1. That means the number turns in secondary winding is higher than the primary winding. In electronics, step up transformers often used in stabilizers, inverters etc where low voltage is converted to a much higher voltage.
A step-up transformer is also used in Electrical power distribution. High voltage is required for power distribution related application. Step up transformer is used in the grid to step up the voltage level before the distribution. Isolation transformer does not convert any voltage levels. The Primary voltage and the secondary voltage of an isolation transformer always remain the same.
This is because the primary and the secondary winding ratio is always equal to the 1. That means the number of turns in primary and secondary winding is same in isolation transformer.
The isolation transformer is used to isolate the primary and secondary. As discussed previously, the transformer does not have any electrical connections between primary and secondary, it is also used as an isolation barrier where the conduction happens only with the magnetic flux. It is used for safety purpose and to cancel noise transfer from primary to secondary or vice-versa.
The transformer transfers the energy by conducting electromagnetic flux through a core material. Different core materials produce different flux density. Depending on the core materials, several types of transformers are used in the power and electronics domain.
Iron core transformer uses multiple soft iron plates as the core material. Due to the excellent magnetic properties of iron, the flux linkage of the iron core transformer is very high. Thus, the efficiency of the iron core transformer is also high. The soft iron core plates can be available in multiple shapes and sizes. The coils of the primary and secondary wound or wrapped on a coil former. After that, the coil former is mounted in soft iron core plates.
Depending on the core size and shapes, a different type of core plates is available in the market. Few common shapes are E, I, U, L, etc. The iron plates are thin, and multiple plates are bunched together to form the actual core. For example, E type cores are made with thin plates with a look of letter E. Iron core transformers are widely used and usually heavier in weight and shape.
A ferrite core transformer uses a ferrite core due to high magnetic permeability. This type of transformer offers very low losses in the high-frequency application. And according to the capacity sizes, it can be divided into an immersed natural cooling transformer and an immersed forced air cooling transformer. A single-phase transforme r is an electrical device that accepts single-phase AC power and outputs single-phase AC. A single-phase transformer is used in non-urban areas as the overall demand and costs are lower than the 3-phase distribution transformer.
They decrease the home voltage to a suitable value without a change in frequency, so it's used as a step-down transformer. For this reason, it is commonly used in electronic appliances at residences. A three-phase transformer is made of three sets of primary and secondary windings. Each set of windings wound around one leg of an iron core assembly. It looks like three single-phase transformers sharing one joined core as in the image below. Three-phase oil-immersed transformer.
We hope the above information will answer your question about the types of transformer. Brief information about Vietnamtransformer MBT company. MBT is the leading enterprise in Vietnam in the field of electrical equipment manufacturing. Most of the input materials are imported from the Group of Seven nations G7. With the severe working spirit, professional methods, constant and continuous creativity of a high qualified experts and engineers team as well as many years of working experience for major electrical equipment manufacturers in Vietnam and abroad and the quality management system ISO ; ISO What is the classification of the transformer?
Table of Contents 1. Types of transformer based on the transformer's core a. Core Type Transformer b. Shell Type Transformer c. Berry Type Transformer 2. Types of transformer based on voltage conversion a. Step Up Transformer b. Step Down Transformer 3. Types of transformer based on its purpose a. Power Transformer b. Distribution Transformer c. Isolation Transformer d. Instrument Transformers e. Current Transformer f. Potential Transformer 4.
Transformer types based on windings a. Two Winding Transformer b. Autotransformer 5. Transformer types based on the insulation used a. Dry Type Transformer b. Oil Immersed Transformer 6. These are classified as potential transformers, current transformers, etc.
The potential transformer is also known as a voltage transformer. The main purpose of this transformer is to decrease the voltage level to a secure limit otherwise value. In this transformer, the primary winding is grounded or earthed like a security point.
As compared to capacitor voltage type, conventional wound type is expensive due to the necessity of the insulations. The current transformer CT is mainly used to gauge as well as also for safety.
Once the current within the circuit is high to directly apply to the measuring instrument, this transformer is mainly used to change the high current into the preferred value of the current necessary within the circuit. In this transformer, the main winding is connected in series toward the main supply as well as the different measuring instruments such as voltmeter, ammeter, protective relay coil, or wattmeter. In this transformer, the term ratio includes a huge significance in CT.
The primary winding of the transformer can be connected in series physically by using the conductor. Here, this conductor carries the measured current within the circuit. This transformer does not include a primary winding. In its place, the line that holds the flow of current within the circuit is threaded using a hole or window within this transformer.
This transformer uses the real cable otherwise bus-bar of the major network like the primary winding, which is equal to an only twist. This type of transformer is used for component protection purposes. The major difference between measuring transformers and protection transformers is the accuracy that means that the protection transformers should be accurate as compared to measuring transformers.
Generally, an instrument transformer is called an isolation transformer or measurement transformer. This is an electrical device mainly used to change the level of voltage and current.
This transformer includes two types of windings like primary and secondary. The AC supply is provided to the primary winding whereas the load is connected to the secondary winding.
All the 3- secondary windings are connected to each other like one secondary winding. So this transformer is called a 3-phase transformer. The transformer is not loaded fully hence the core loss takes place for the whole day, but the copper loss is based on the load cycle of the distribution network.
If the power transformer is connected in the transmission network, the load fluctuation will be very less as they are not connected at the consumer end directly, but if connected to the distribution network there will be fluctuations in the load. The transformer is loaded for 24 hours at the transmission station, thus, the core and copper loss will occur for the whole day.
The power transformer is cost-effective when the power is generated at low voltage levels. If the level of voltage is raised, then the current of the power transformer is reduced, resulting in I 2 R losses and the voltage regulation is also increased. This type of transformer has lower ratings like 11 KV, 6. They are rated less than MVA and used in the distribution network to provide voltage transformation in the power system by stepping down the voltage level where the electrical energy is distributed and utilized at the consumer end.
The primary coil of the distribution transformer is wound by enamel coated copper or aluminum wire. A thick ribbon of aluminum and copper is used to make secondary of the transformer which is a high current, low voltage winding. Resin impregnated paper and oil is used for the insulation purpose. The various types of the distribution transformer are categorized on the following basis and are shown in the figure below.
The distribution transformer less than 33 KV is used in industries and , V is used for the domestic purpose. It is smaller in size, easy to install and has low magnetic losses and is not always loaded fully. As it does not work for constant load throughout 24 hours as in the daytime its load is at its peak, and during the night hours it is very lightly loaded thus the efficiency depends on load cycle and is calculated as All Day Efficiency.
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