Circuit Breaker Rating: The ratings of a circuit breaker refer to the characteristic values that define the working conditions for which the circuit breaker is designed and built. Circuit breakers…
Static Distance Protection Relay: Static Distance Protection Relay are characterized by having two input quantities respectively proportional to the voltage and current at a particular point in the power system,…
Three Phase Auto Recloser vs Single Phase Auto Reclose: Three Phase Auto Recloser is one in which the three phases of the transÂmission line are opened after fault incidence, independent…
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…
Scheme of Distance Protection: In developing an overall Scheme of Distance Protection, it is necessary to provide a number of relays to obtain the required discrimination. Modern practice is to…
Instantaneous Overcurrent Relays: If the relay operates instantly without any intentional time delay, this characteristic can generally be satisfied by a relay of the non-polarized attracted armature type. This relay…
Important Questions of Sub Stations: 1. What is a sub-station ? Name the factors that should be taken care of while designing and erecting a subÂstation. 2. Discuss the different…
Important Questions of Overvoltage Protection: 1. What is a voltage surge ? Draw a typical lightning voltage surge. 2. Discuss the causes of overvoltages. 3. What is lightning ? Describe…