General Methods of Testing Protective Gear: The General Methods of Testing Protective Gear are namely, Primary Injection, Secondary Injection, Measurement of Time, Primary Injection: These tests are limited by the…
Types of Auto Reclosing: Types of Auto Reclosing can be broadly classified in two categories: Medium voltage auto-reclose where continuity of supply is the principal aim. High voltage auto-reclose where…
Auto Reclosing Scheme: Auto Reclosing Scheme - It is well realized that the transient faults which are most frequent in occurrence do no permanent damage to the system as they…
Motor Protection: Motor Protection - There is a wide range of motors in existence for various purposes. However, the fundamental problems affecting the choice of protection are independent of the…
Rotor Protection: Rotor Protection - As pointed earlier rotor windings may be damaged by earth faults or open circuits. Figure (6.16) shows a modern method of rotor earth-fault detection. The…
Power Swings in Power System Protection: The impedance measured or seen by a distance relay during normal load is shown in Fig. (5.29). Normally this would be outside the tripping…
Differential Relay Application: The principle of operation depends on a simple circulating current principle where the difference of the currents of the two CTs flows through the relay under normal…
Important Questions of Generating Stations : 1. What is a power generating station ? 2. What is a steam power station ? Discuss its advantages and disadvantages. 3. Draw the…