Dry type Transformer failure reasons and troubleshooting
Dry-type transformers are a part of most electrical installations. They range in size from small doorbell transformers to three-phase 25-kVA […]
Transformer
Electrical Appliance
Fluorescent Lamp: Construction, Working and Advantages, Disadvantages
Construction of Fluorescent Lamp Edmund Germer’s invented Fluorescent lamp and it is a hot cathode low-pressure mercury vapor lamp. It
Electrical Machine
4-point starter method for DC Motor
4-point starter The functional characteristics of a 4-point starter are similar to a 3 point starter. 4-point starter works as
Electrical Machine
3-point starter method of DC Motor
What is Three-point starter A 3-point starter is an electrical device, used for starting as well as maintaining the DC
Basic Electrical
Faraday’s Laws of Electrolysis and Electroplating process
Faraday’s First Law Faraday’s First Law states, during electrolysis process , the amount of chemical reaction take place at electrode
Basic Electrical
Primary Cell and Secondary cell
What is Primary Cell? Primary cells cannot be recharged, that is, the conversion of chemical energy to electrical energy is
Transformer
What is Eddy Current and Eddy Current loss
What is Eddy Current? If a coil is wound on a ferromagnetic core (such as in a transformer) and alternating
Electrical Substation
Capacitor Bank Protection
Introduction The protection of shunt capacitor banks against internal faults involves several protective devices/ elements in a coordinated scheme. Typically,
Electrical Substation
Capacitor Bank Design
Introduction The protection of shunt capacitor banks requires understanding the basics of capacitor bank design and capacitor unit connections. Shunt
Electrical Substation
Shunt Capacitor Bank Unit and Bank configuration
Capacitor Unit The capacitor unit, Fig-A, is the building block of a shunt capacitor bank. The capacitor unit is made
Electrical Machine
Cause of Malfunction in AC machine and Practical solution
Cause of Malfunction in AC machine and Practical solution Overheating of the stator winding of a synchronous machine Cause of
Electrical Machine
Auto synchronous motor or Synchronous Induction Motor
A normal synchronous motor rotor having a damper winding arranged such like slip ring IM. On applying 3-phase supply to
Electrical Machine
Generator working Principle and How to generator work
Generator Working Principle Electromagnetic Induction in Generator Electromagnetic induction, the basic principle of generator operation, involves the movement of an
Transmission Line
XLPE cable: Construction, Voltage rating, Advantage
Introduction Cross linked polyethylene (XLPE) insulated single core and multicore cables are manufactured with colours of cores red, yellow, blue
Electrical Substation
Waveform Distortion: DC offset, Harmonics, Notching, Noise
What is Waveform Distortion? Waveform distortion is defined as a steady-state deviation from an ideal sine wave of power frequency
Electrical Substation
What is Voltage Sag and Swell in Power quality
What is Sag (dips) in Power quality? A sag is a decrease to between 0.1 and 0.9 pu in rms
Electrical Machine
Synchronous motor: Definition, Work, Industrial Application and Comparison
What is Synchronous Motor? Synchronous motors are synchronous machines used to convert electric power to mechanical power. Synchronous motors can
Interview
Basic Electrical Interview question
1.What is static electricity? Static electricity means electricity at rest. If we join a charged conductor to another conductor, electricity
Electrical Machine
What is Stepper Motor and their 3 types and Application
What is Stepper Motors? Stepper motor is known by its important property to convert a train of input pulses i.e.,
Circuit Breaker
What is Switchgear in Electrical Engineering
What is Switchgear ? The apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as
Electrical Substation
Electrical Substation: Standard Practice and Maintenance Points
Introduction A modern electrical power system catering to huge energy demands are spread over extensive areas. It contains several major
Interview
Interview Question on Electrical Motor
Interview Question on Electrical Motor What are the types of AC three phase motors? Mainly there are two types. A)
Electrical Machine
Types of single phase induction motors and their diagram
Introduction A standard single-phase induction motor has two windings placed at an angle of 90° to each other. One of
Transformer
Transformer Differential Protection and their diagram
Transformer Differential Protection Percentage differential protection is used for large power transformers above 5 MVA rating for the protection against
Interview
Interview Question for Electrical engineer and ITI Electrician
Interview Question for Electrical engineer and ITI Electrician What is electric traction? Answer: Traction means using the electric power for
Transformer
Polyphase Transformers and their connection
What is Polyphase Transformers? Almost all the major power generation and distribution systems in the world today are three-phase ac
Electrical Appliance
Ramp Type Digital Voltmeter
What is Digital Voltmeter? A digital voltmeter (DVM) displays the value of a.c. or d.c. voltage being measured directly as
Transformer
Sumpner’s test or back to back test on Transformer
Sumpner’s Test conducted to Transformer to determine Sumpner’s test or back to back test on transformer is method for determining
Transmission Line
Underground Cable: Their types, Rating, insulation material, advantages
Introduction Since the loads having the trends towards growing density. This requires the better appearance, rugged construction, greater service reliability
Transformer
Special Transformer Types and Application
Phase Shifting Transformer (PST) A special kind of transformers like PST or Phase Shifting Transformer is used to control the