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Line to Line Fault

Line to Line Fault (LL): Figure 11.7 shows a Line to Line Fault at F in a power system on phases b and c through a fault impedance Zf. The phases…

Double Line to Ground Fault

Double Line to Ground Fault (LLG): Figure 11.9 shows a Double Line to Ground Fault at F in a power system. The fault may in general have an impedance Zf…

Single Line to Ground Fault

Single Line to Ground Fault: Figure 11.4 shows a Single Line to Ground Fault at F in a power system through a fault impedance Zf. The phases are so labelled…

Carrier Current Protection of Transmission Lines

Carrier Current Protection of Transmission Lines: In modern high-power electrical systems it is necessary to have quick acting protections on long transmission lines. The requirements to be met by such…

Frame Leakage Protection of Busbar or Fault Bus Protection

Frame Leakage Protection of Busbar or Fault Bus Protection: Frame Leakage Protection of Busbar or Fault Bus Protection is one of the most simple form of protection and is applicable…

Effects of Short Circuit Faults on Power System

Effects of Short Circuit Faults on Power System: Depending upon power circuit voltage and configuration, method of neutral connection, presence of regulating devices and the speed of disconnection of the…

Different Types of Faults in Power System

Different Types of Faults in Power System: A fault in an electrical equipment/apparatus is defined as a defect in the electrical circuit due to which current is diverted from the…

Protection of Feeders and Transmission Lines Interview Questions and Answers

Protection of Feeders and Transmission Lines Interview Questions and Answers: 1. What is unit type protection ? Ans. Unit system of protection is one in which the protection responds to…

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