Difference between Synchronous motor and Induction motor
Synchronous Motor 3Φ Induction Motor By MePaJa – Own work, CC BY-SA 4.0, Link By Zureks – Own work, CC BY-SA 3.0, Link Synchronous motor is a doubly excited machine which requires a DC...
Category: Electrical
Difference between Class A, B, C, D, K and Z Type Miniature Circuit Breakers (MCB)
MCBs are classified into different types based on their tripping characteristics which are the range of tripping fault current at which the device operates in the event of a short circuit or overload. Type...
Armature Resistance in DC Generators
Armature resistance “Ra” is the resistance offered by the armature circuit. It comprises, a. Armature Winding Resistance Armature Winding resistance is the ohmic resistance of the copper winding wires. b. Resistance of Brushes A brush is used to...
Why DC Shunt Motor is a Constant Speed Motor?
The speed of a DC motor is directly proportional to the voltage across the armature terminals and inversely proportional to the flux (φ) due to the field windings (N ∝ 1 / φ), that...
DC Generator Ratings
The ratings of a DC generator are the parameters like voltage, current, speed, and power which are the specifications of the machine that defines the capacity of it or the norms it is to...
Power Factor Improvement using Capacitor Bank
Capacitor Bank is an assembly of capacitors that has the same rating arranged in series or parallel. In AC power supplies Capacitor Banks are mainly used to improve the power factor of the AC Loads....
How to wire a DB – Distribution Board Wiring
Distribution Board or DB is an electricity supply system or a common enclosure that distributes the electrical power feed into subcircuits. It includes isolator, RCCB (Residual current circuit breaker) or RCD (Residual-current device) devices, protective fuses or MCB’s (Miniature Circuit...
Transformer Questions and Answers Interview Viva
What is the operating principle of a Transformer? A transformer works based on the principle of mutual induction. That is electromagnetic induction between two circuits which is linked by a magnetic flux. What...
Electrical & Electronics Quantities Units and Symbols
Electrical Quantity Quantity Symbol Unit Unit Symbol Admittance Y Siemens Ω−1 Apparent Power S Volt-Ampere VA Capacitance C Farad f Charge Q Coulomb C Conductance G Siemens Ω−1 Conductivity σ (sigma) siemens per metre...
Different types of Transformer Losses – Copper, Iron, Stray, Dielectric losses
In every power system, the amount of useful energy would be always less than the total amount of energy applied to the system. Because some amount of energy always transforms into unwanted forms. No any...