General Methods of Testing Protective Gear

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…

Continue Reading General Methods of Testing Protective Gear

Types of Auto Reclosing

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…

Continue Reading Types of Auto Reclosing

Auto Reclosing Scheme

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…

Continue Reading Auto Reclosing Scheme

Motor Protection

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…

Continue Reading Motor Protection

Rotor Protection

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…

Continue Reading Rotor Protection

Power Swings in Power System Protection

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…

Continue Reading Power Swings in Power System Protection

Differential Relay Application

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…

Continue Reading Differential Relay Application