The principle of operation of line differential protection is same as transformer differential protection. The only difference is transformer differential protection uses only one differential relay whereas line differential protection… Read more »
In this post we can learn the working and configuration of Numerical Under voltage [27] /Over voltage [59] protection relay. These relays measure either phase to phase (Ph-Ph) or phase… Read more »
Core Balance Current Transformer-CBCT: Core-Balance Current Transformer CBCT also called as Zero Sequence CT. In this type of CT a single ring or rectangular shaped core of magnetic material, encircles… Read more »
Potential or Voltage Transformer: The purpose of the Potential Transformer is to provide an isolated secondary voltage that is in-phase and exact proportionate representation of primary voltage. Potential Transformers are… Read more »
Electrical Interview Questions-Series-4 In this series of Interview questions we will learn about the major differences in Electrical Engineering. Major Differences in Electrical Engineering: 1. What are the major differences… Read more »
Differential Protective Relay is a protective relay that functions on a percentage or phase angle or other quantitative difference of two currents. Differential relaying provides selectivity by providing a zone… Read more »
Motor protection relays are used to provide various protections for the motors. These differ from the over current relays in terms of protections they offer. To understand the working of… Read more »
Over current/Earth fault relays are the basic protection relays. Used for protection of transformers and feeders from over current and earth faults. When excessive current flows in a circuit, it… Read more »
Numerical Relays working explained in this post with the help of a Numerical relay used in industrial applications. Brief Introduction about Relay: RELAY: A Relay is a protection device that… Read more »
Auto Changeover Scheme Introduction: In this post the Auto Changeover Scheme for two incomers and one Bus-coupler system is explained. In Industries for distribution of electrical power with reliable supply… Read more »