Crowbar fault protection circuit
Crowbar circuit is used to protect circuit or equipment under fault condition Over Current Causes: Over current flow through thyristors in a circuit due to: Flow of short circuit current…
R R-C Firing Circuits Disadvantages
Firing Circuits: Gate triggering is the most commonly used turn-on method employed to switch on the thyristors. Triggering circuits is also called firing circuits. There are various firing circuits available.…
Importance of Hysteresis Loop
Hysteresis Loss: When a magnetic material is subjected to a cycle of magnetization (magnetized first in one direction and later magnetized in opposite direction in a cyclic manner), an energy…
Advantages of Star and Delta Systems
In a 3-phase system the alternators or generators may be star connected or delta connected. Likewise 3-phase loads may be star connected or delta connected. Some of the advantages of star and…
Generator Protection Interview Questions & Answers
Synchronous Generator Protection Interview Questions Answers What are the common types of generator faults? The common types of faults occurring in synchronous generators are: Stator winding faults (phase to phase…
Induction Motor Protection Interview Questions Answers
Induction Motor Protection Interview Questions Answers What are the type of faults that are likely to occur in operation of 3 phase induction motor? The faults which are likely to…
Transmission Lines Protection Questions Answers
Transmission Lines Protection Questions Answers What is meant by Tine Graded Protection? Time Graded protection is a scheme of over current protection, in which the discrimination is incorporated i.e, the time…
High Voltage and Power System Stability Interview Questions
High Voltage (HV) Interview Questions Answers Why Earth Wire is provided in the overhead transmisssion lines? Earth wire is provided above the overhead transmission lines for protection against lightning strokes.…
Voltage Control & Circuit Breakers Interview Questions
Voltage Control Interview questions How the Voltage Control in power system is achieved? Voltage control is achieved by suitably installing voltage control equipment at specified places such as at Generating…
Reactive Power Sources and Sinks in Power System
Dynamic Reactive Power Sources: It includes reactive power compensators which have the ability to respond within duration of cycles and try to balance the reactive power requirement in the system.…
