Static Relays Basics and Classification: A Static Relays Basics refers to a relay in which the measurement or comparison of electrical quantities is done in a static network which is…
Potential Transformer Tests: The three Potential Transformer Tests are namely, Polarity check, Ratio check and Phasing check. Polarity check: Polarity check in Potential Transformer Tests is performed in the same…
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…
Classification of Relay Testing: Classification of Relay Testing are usually conducted to demonstrate that: the relay will operate correctly to clear a fault; and the relay will remain inoperative on…
Unbalanced Loading Protection of Generator: Unbalanced Loading Protection of Generator - Whatever be the cause of the unbalance it is obvious that the negative phase sequence current will result in…
Differential Protection of Transformers: Differential Protection of Transformers is the most important type of protection used for internal phase-to-phase and phase-to-earth faults and is generally applied to transformers having ratings…
Carrier Pilot Protection and Microwave Pilot Protection: The problem of providing economically an auxiliary channel by means of pilots for long lines directed attention to carrier techniques. In this case…
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…