Types of IGBT
Insulated Gate Bipolar Junction Transistor (IGBTs) are normally classified into two types. They are namely (i) Non Punch Through IGBT (ii) Punch Through . These IGBTs are also referred to…
How a Level Switch Works
Liquid level switches detect liquid levels or interfaces between liquids such as oil and water, or liquid and solid interfaces. Liquid level switches are used in a number of liquid…
Silicon Carbide Lightning Arresters Working Principle
Silicon Carbide Arresters (SIC): The Non linear lightning arrester basically consists of set of spark gaps in series with the silicon carbide non linear resistor elements. Lightning arresters are connected…
Basics of Actuators
A valve actuator is a device that produces force to open or close the valve utilizing a power source. This source of power can be manual (hand, gear, chain-wheel, lever,…
Substation Interview Questions Answers
What are different insulators employed in substations? Some of the insulators employed in substations are: Pin insulators Post insulators Strain insulators Suspension insulators Hallow apparatus insulators Dead-end insulators Solid core…
Basic Electrical Engineering Interview Questions Answers
Define luminous flux It is defined as the total quantity of light energy emitted per second from a luminous body. It is represented by symbol F and is measured in…
Induction Motor Interview Questions & Answers
How does the Induction motor work? (OR) Why does the Rotor rotate? When the 3 phase stator windings are fed by 3 phase supply, a magnetic flux of constant magnitude…
Turbine Flow Meter – Principle, Advantages, Disadvantages
The turbine flow meter sends the liquid through a rotor causing it to rotate at an angular velocity proportional to the fluid flow rate.
Power System Interview Question and Answers
What is meant by synchronous condenser? An over excited synchronous motor running on no load is known as synchronous condenser. It is used to improve the power factor of the…
Eddy Current Working Principle Animation
Eddy currents are currents induced in conductors, when a conductor is exposed to a changing magnetic field due to relative motion of the field source and conductor; or due to…
