VFD Block Diagram, Working Principle
VFD block diagram showing rectifier , intermediate circuit and inverter
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What is Current Transformer-Working, Construction, Type
The current transformer (CT) is a type of instrument transformer designed to measure high-value current in the power system. The primary has few numbers of the turn of heavy wire, and the secondary of the current transformer has many turns of…
Fleming’s left-hand rule and Right hand rule-Motor and Generator
When the current-carrying conductor placed in a magnetic field, it experiences a force due to the magnetic field on the other hand if the conductor moved into the magnetic field an emf gets induced across the conductor as per faraday’s…
Multiple Choice Question (MCQ) of D.C. Machines
Bridge Rectifier-Working Diagram Advantages
The Bridge rectifier is a circuit that converts the alternating voltage into the direct voltage. Rectifiers are made up of diodes and thyristors, to convert AC supply voltage into DC. There are many applications such as electronic circuits, HVDC transmission…
Working Of Capacitor, Formula, Symbol Properties
Capacitor is a passive element in a circuit designed to store energy in the form of an electric field. besides resistor, capacitors are the most common electrical components. used mostly in electronics circuit, computers, power system. They are also used…
Reactive Power Generation and Compensation,Advantages
Some methods of reactive power generation, compansation and advantages of reactive power generation are describe below • synchronous alternators; • synchronous compensators (SC) • static var compensators (SVC) Reactive power using synchronous alternators Synchronous alternators are the main machines…
Difference between Current Transformer (CT) and Potential Transformer (PT)
Difference between Current Transformer (CT) and Potential Transformer (PT) Current Transformers (CT) and Potential Transformers (PT) are used to measure the current and voltage in a circuit of the order of hundreds of amperes and volts respectively. A CT has…
What is Lightning Arrester-Working Principle Diagram
Grounding wire running over the tower or substation provides good protection to the electrical system against direct lightning stroke but they fail to provide protection against traveling high voltage or current waves that reach to terminal equipment. The lightning arrester…
Why single-phase induction motor is not self-starting-reason,make self starting?
Why single-phase induction motor is not self-starting? Single-phase induction motor Starting winding to make self starting A single phase induction motor is very similar to a three phase squirrel cage induction motor except for single-phase motor, not self-starting.It has (i) a squirrel-cage rotor as to a…