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Direct Online Starter Or DOL Starter
Direct Online StarterIn the previous post we have learned about Star Delta Starter. In this post we are going to learn about Direct Online Starter or DOL starter.Why We Use Starter?A starter is...
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Lead Lag Compensation In Control System
LEAD LAG COMPENSATION IN CONTROL SYSTEMIn this post we are going to learn about types of compensations, why compensation of control system is required, lead and lag compensation in control...
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What is Creeping in Energy Meters ?
Creeping in Energy Meters: In some energy meters a slow but continuous rotation of the disc is obtained when the pressure coils are energized and there is no load current passing through the current...
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Current Differential Relay Working || Types of Differential Relays
Current Differential Relay Working || Types of Differential RelaysWhat is differential relay?In the over-current relays, a current is sensed but such relays are not very sensitive as these relays...
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Applications of Synchronous Motors || Advantages/Disadvantages
In our previous posts we have discussed synchronous motor working principle ,why synchronous motor is not self starting? etc.The most important thing is why mostly we use synchronous motors over...
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9 Advantages of Three Phase System Over Single Phase System
Three Phase System Advantages In modern power generation, transportation, distribution we use poly-phase system over single phase system.In poly-phase AC system it might be two , three or more...
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Auto Transformer Principle of Operation,Working & Applications
An auto transformer is a electrical transformer having only single winding which acts as both primary and secondary,so in input and output connected to shared single winding.Why we need to go for Auto...
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How to Draw Potier Triangle/ZPF characteristics ?
Regulation by Zero Power Factor ( ZPF) method of Alternator:During the operation of the alternator, resistance voltage drop IaRa and armature leakage reactance drop IaXL are actually emf quantities...
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Difference between Squirrel Cage and Slip Ring Induction Motor
Difference between Squirrel Cage and Slip Ring Induction MotorOn our electrical learning portal we have posted articles based on comparisons and differences.In this article we are going to discuss...
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Why we use only 11KV / 22KV / 33KV / 66KV / 110KV / 230KV / 440KV. Why can’t...
Why electricity is being transmitted in multiple of 11?Have you ever wondered? why we use only 11KV / 22KV / 33KV / 66KV / 110KV / 230KV / 440KV which are multiples of 1.11(we can say multiple of...
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Line to Line Fault Definition, Fault Current Analysis, Calculation
Line to Line Fault Definition, Fault Current CalculationWhat are the points to be covered?What is line to line fault?How line to line fault occurs?Fault current in line to line fault.Calculate line to...
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Site Selection of Hydroelectric Power Stations
Factors Affecting Hydroelectric Plant LocationSite selection of Hydroelectric power plantHydroelectric power / Hydro-power plant is one of the eco-friendly power generation systems.It has less running...
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Star to Delta and Delta to Star Conversion (Wye-Delta Transformations)
Star to Delta and Delta to Star Conversion(Wye-Delta Transformations)It is easy to calculate equivalent resistance of resistors which are in either parallel or series.Sometimes we may face difficulty...
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What is Transfer Function In Control System ?
Transfer Function of Control SystemDefinition: Mathematically it is defined as the ratio of Laplace transform of output (response) of the system to the Laplace transform of input (excitation or driving...
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Differences Between Gravity Control and Spring Control
Comparison of Gravity Control and Spring ControlGravity control or Spring control both are comes under the category of "controlling torques" of an electrical measurement instrument.Before going have a...
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Differences Between Alternator and Generator
Differences Between Alternator and GeneratorAlternator and Generator both are electro-mechanical machines which converts mechanical input to electrical output i.e., electrical energy.Though output of...
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Basic Electrical Engineering MCQs -1
01) Two 100W, 200V lamps are connected in series across a 200V supply. The total power consumed by each lamp will be in Watts :-A) 25 WattsB) 50 WattsC) 100 WattsD) 200 WattsAShow Answer02) Two...
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Auto Transformer Starter
What Is Auto Transformer Starter?Starter is a device which limits the starting current for the smooth starting of motor.Similarly with the auto transformer starter starting current controlled by a...
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