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EMF Equation of Transformer & Voltage Transformation Ratio
Transformer EMF EquationIn the previous post we are discussed about working principle of transformer.In this article the amount of emf induced in the secondary winding due to the current supplied to...
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Buchholz Relay Construction, Working In Transformer
What is a Buchholz relay?Buchholz relay is one of the protective device for electrical transformer from internal faults.It works with all gas and oil immersed transformer.Buchholz relay in transformer...
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Losses In Transformers ; Hysteresis Loss, Eddy Current Loss,Efficiency
Hysteresis Eddy Current(Iron) or Core Losses and Copper Loss in TransformerWe have discussed about electrical transformer construction,working.When it comes to efficiency of the transformer it is above...
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Resistance, Leakage Reactance of Transformer
Practical Transformer With Resistance And Leakage ReactanceIn the previous post we discussed about losses in transformer.We get loss in output power of transformer due to resistance,leakage reactance...
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Construction of Alternator or Synchronous Machine
3 phase synchronous generator or alternator or synchronous machine construction Alternator is the machines which generates the power which we are using today.Now let us discuss about construction of...
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Open and Short Circuit Test on Transformer
We conduct open circuit and short circuit test on single phase transformer to determine the efficiency and regulation of a transformer on any load condition and at any power factor.Open circuit &...
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Sag & Tension In Electrical Transmission Lines
Sag in transmission lineToday we are going to learn a topic called sag and tension in the transmission lines.During the erection of overhead transmission line, the conductors are connected between two...
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Advantages of Rotating Field Over Rotating Armature
In this article we are going discuss about why rotating field is used over rotating armature in alternators or synchronous machine.In the alternator construction we said in large AC generators we use...
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Parallel Operation of D.C. Generators
Parallel Operation of D.C. GeneratorsIn this tutorial we going to discuss about parallel operation of DC generators.We mostly do not go for parallel operation for DC series generators ,but in some...
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Brake Test On DC Shunt Motor
Brake Test On DC Shunt Motor In this article we are going to discuss about brake test on d.c. motor.Brake test is also a method of finding efficiency of dc motors.We took dc shunt motor as running...
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Hopkinson's Test or Regenerative Test On DC Machines
Hopkinson's Test or Regenerative Test On DC MotorIn the previous post we have seen how to determine the efficiency of DC machines using brake test. Hopkinson's test is also a test of finding the...
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Retardation Test or Running Down on D.C Machines
Retardation Test or Running Down on D.C Machines In the previous articles we have seen brake test,hopkinson's-test which are essential to find out dc machine efficiency.Now in this article we are going...
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3 Point Starter Working & Construction
3 Point Starter | Working & Construction of Three Point StarterA starter is a device which helps in smooth starting and running of a dc motor(mostly dc shunt,compound motors).More technically,an...
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Electrical Braking of Induction Motor
Induction Motor Braking Regenerative Plugging Dynamic Braking of Induction MotorInduction motors are most widely using motors in present days for domestic and industrial purpose.But controlling of AC...
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4 Point Starter Working & Construction
4 Point Starter | Working & Construction of Three Point StarterIn the previous post we have seenhow does a 3 point starter works. There is only one difference in construction between 3 point...
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Losses In DC Generator (DC Machines)
In the previous articles we discussed about DC generator working, Voltage equation of dc generator. Efficiency is a very important specification of any type of electrical machine. When we talk about...
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Parallel Operation of Transformers
The transformers are connected in parallel when the load on them is more than the rating of the individual transformers. Before going to discuss about parallel operation of single phase transformers A...
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Shaded Pole Induction Motors-Working & Construction
Shaded Pole Induction MotorsWe know that 'single phase induction motors are not self-starting' .To make them self starting we use capacitors,shaded poles etc.In this article we going to see shaded pole...
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Why Synchronous Motor Is Not Self Starting?
Everyone is saying synchronous motors are not self starting but why here we going to discuss if you don't have time to read this whole article to know why synchronous motor is not self startingANSWER...
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Starting Methods of Synchronous Motor
In the previous article we came to know that synchronous motors are not self starting so to make them start automatically we should add some tweaks.We should rotate rotor near to the speed of...
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