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Wazipoint bulletin board published the following articles for you over last week, completely free for your kind visit, and share your idea to improve our contribution in the near future.


  • Safety of DuPont Suva Refrigerants
  • Hydroelectric Power Generation Requires Seamless Geo-support that only come across the Himalayan Kingdom of Bhutan
  • Power Losses Calculation for High Voltage Underground Cables
  • How Calculate The Tariff in Electricity Bill?
  • Comparison of 2-wire and 3-wire Distribution Systems
  • Conditions for Current Carrying Capacity of Power Cable
  • How Carry Out the Quality Inspection Test for Electrical Installation?
  • High Voltage Cable Insulation Material Construction

Transformer working principle and uses in electrical engineering field
A transformer with a constant value that exceeds and reduces the value of AC voltage by mutual induction without altering the frequency is called a transformer.After the generation of electricity, the way it is up and down is reached in far-flung areas according to its requirement. It is not possible without a transformer. Transformers do not have a frequency change. The frequency that remains in
Transformer Equivalent Circuit Diagram
How to draw the Equivalent Circuit Diagram of a Transformer?If you want to draw the Transformer equivalent circuit, it would be like below:What should be considered during draw the Transformer equivalent circuit diagram?Considering the two major parts of a transformer- primary winding and secondary winding with their parameters the equivalent circuit would be as above;where,R1 = Primary Winding
Exact Voltage Drop of a Transformer
How to Calculate the Exact Voltage Drop of a Transformer?Transformer voltage drop is important to know because it is one of the factors that affect the performance of an electrical system where it is installed. There are two most common methods to calculate the transformer voltage drop-Approximate Method;Exact Method.The Approximate Method of Transformer Voltage drop calculation in details is
Transformer Total Voltage Drop
Total Approximate Voltage Drop of a Transformer During the no-load condition, induced voltages at the primary and secondary windings are equal to the applied voltage and secondary terminal voltage respectively. If 0V2 be the secondary terminal voltage at no load, we can write E2 = 0V2.When the transformer is on no-load, then V1 is approximately equal to E1. Hence E2 = KE1 = KV1. Also,E2 = 0V2
Simplified Diagram of Transformer
Transformer Simplified DiagramTo get an understanding of the simplified diagram of a transformer, you have to study the vector diagram of the transformer. The combined vector diagrams are shown herewith the figure VD-A, VD-B and VD-C.The vector diagram of Fig. VD-A may be considerably simplified if the no-load current I0 is neglected. Since I0 is 1 to 3 per cent of full-load primary current I1,
Transformer with Resistance and Leakage Reactance Calculation
Transformer with Resistance and Leakage ReactanceWhat do you mean by the Transformer Resistance and Leakage Rcctance?The Transformer resistance means the resistance of the primary and secondary winding of the transformer. Transformer Leakage Reactance means there is some magnetic leaking in both of the primary and secondary windings that should be equal to inductive coils connected in both
Why Happen Over-voltage In Power System?
The Major Causes to Why Over-voltage Develop in Power Distribution System. The causes of happening over-voltage in the power transmission system may many more reasons. In short, we can define internal causes and external causes to develop over-voltage in electrical power transmission or distribution networks. We can sum up the whole causes of overvoltage in the power system in the major
Magnetic Leakage of a Transformer Breaks Ideal Characteristic
Fig-1: Magnetic Leakage of Transformer How does magnetic flux determine the ideal transformer is not possible in practical?Generally, it assumed as our elementary knowledge about the transformer theory that the flux linked with the primary winding is also linked to the secondary winding.But in a practical transformer cannot links all the fluxes to the secondary windings what is linked at
Transformer Equivalent Resistance
Fig-1: Transformer Equivalent ResistanceFig-2: Transformer Equivalent ReactanceHow to Calculate the Transformer Equivalent Resistance and Reactance?The transformer’s impedance is given in percentage or per unit system. It is because of the reason that the impedance value for the transformer is represented as two values one wrt to low voltage winding and the other is high voltage winding. Both
Transformer with Losses but no Magnetic Leakage
To base our knowledge about the electrical transformer, we assumed an ideal transformer i.e. one in which there were no core losses and copper losses. But in practical conditions of a real transformer, it requires that certain modifications be made in the foregoing theory. When an actual transformer is put on the load, there is an iron loss in the transformer core and copper loss in the
Transformer on Load
When an electrical load is connected to the secondary winding of a transformer and the transformer loading is, therefore, greater than zero, a current flows in the secondary winding and out to the load.This secondary current is due to the induced secondary voltage, set up by the magnetic flux created in the core from the primary current.Transformer On-loadThe great electrical book writer B.L.
Transformer on No-load
The answer to the question lies in one of the assumptions made for an ideal transformer. The core of an ideal transformer is supposed to have infinite permeability. So, no MMF is needed to produce working flux. But, in a practical transformer, the permeability is not infinite so we need a certain current for a certain amount of MMF which will produce the required working flux.No load current has
Transformer Voltage Transformation Ratio
WAZIPOINT, WAZIPOINT Engineering Science & Technology - 3 months ago
Transformer Voltage Transformation RatioHow to define the voltage transformation ratio of a transformer?The voltage transformation ratio of a transformer is nothing but the ratio of transformer core turn number or induced voltage onto the cores.In our previous article about Transformer E.M.F. Equation and Derivation, we have equated 2 equation for induced voltage of the transformer primary and
Transformer E.M.F. Equation and Derivation
WAZIPOINT, WAZIPOINT Engineering Science & Technology - 3 months ago
E.M.F. Equation of a Transformer and derivation the Primary and Secondary Winding Induced Voltage The article of Transformer emf equation derivation helps us to calculate the primary and secondary winding induced voltage and it's r.m.s value. The derivated relation between primary and secondary windings turns number and the magnetic flux in the transformer core.The r.m.s. value of the e.m.f.
How to Explain the Elementary Theory of an Ideal Transformer?
WAZIPOINT, WAZIPOINT Engineering Science & Technology - 3 months ago
Ideal Transformer does not exist according to the Elementary TheoryA transformer can never be an ideal device to transfer power. Theoretically, an ideal transformer is useful in understanding the practical transformer. Because a Transformer, inherently design has limitations caused by losses within the device itself, like- transformer Core Loss and Transformer Copper Loss. An ideal transformer
Transformer Construction and Configuration
Fazlur Rahman, WAZIPOINT Engineering Science & Technology - 3 months ago
Who invented the transformer?Electric transformers were invented by William Stanley in the United States in 1885, and it is also said that the transformer was invented by Michael Faraday in 1831 in Britain.Definition of TransformerIf we look at the definition of Transformer above then we will find that it is a device that either step-up the voltage or step-down, that is, according to the
History of Electricity in Bangladesh
Fazlur Rahman, WAZIPOINT Engineering Science & Technology - 3 months ago
History of First Electricity Uses in Dhaka even Bangladesh: Bangladesh: Developing every day every moment Brief History of Electricity In Bangladesh: Bangladesh borne in 1971, but electricity utilization started in this region as a part of India before creation Bangladesh. First electricity switched on 7 December 1901 in Ahsan Monjeel, the residence of the Nawab of Dhaka. Latter on
Electrical Transformer Working Principle
WAZIPOINT, WAZIPOINT Engineering Science & Technology - 4 months ago
According to the rules of Electro Magnetic Induction of transformer Faraday works on the principle of Mutual Induction. If Rakhi is supplied in either of the two coils nearby, EMF Induce from the magnetic flux to the other coil also. The transformer works on this basis.Mutual Induction of a TransformerThe mutual induction between the two coils is called the property of the coil. When two coils
Standard Colour Code for Electrical Power Cable and Wiring
Fazlur Rahman, WAZIPOINT Engineering Science & Technology - 4 months ago
Basic Colour Code for Electrical Cable and Power Cable International standard IEC 60446 developed basic and safety principles for man-machine interface by marking and identification of electrical cabling and wiring system. Identification of equipment terminals, conductor terminations and conductors define basic safety principles for identifying electrical conductors by colours or
Transformer Introduction and FAQ: Frequently Asked Question of a Transformer
WAZIPOINT, WAZIPOINT Engineering Science & Technology - 4 months ago
Major Parts of an Electrical TransformerFAQ of an Electrical Transformer Introduction of a TransformerA transformer is a static electrical machine used to change the voltage of alternating current that has the same frequency. Before going to details on the electric transformer, types of transformers, parts of transformer, construction of a transformer, step-up transformer, voltage transformer,

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