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We are going to discuss here in this article a clear idea about SOTF Protection. Sometimes it becomes necessary to open a circuit breaker just after closing. This is due to the presence of a fault during the closing of the circuit breaker. This type of condition may arise due to different reasons. Such as … Read more
We often refer to a contact multiplier relay simply as a contact multiplier. Also, we call it a contact multiplying relay or contact multiplication relay. It is a special type of electromagnetic attraction armature relay. Its function is to multiply the auxiliary contacts of a main relay. Sometimes, a protection relay does not have sufficient … Read more
An electrical protection relay is an intermediate device that bridges the function of a current transformer or a similar fault-detecting device to one or more circuit breakers. In other words, the relay connects the fault-sensing device with the fault-clearing device. Essentially, a relay has a simple magnetic coil that receives current from the current transformer. … Read more
In this article, we are going to discuss the dead tank current transformer, commonly referred to as a dead tank CT. Dead tank current transformers are not popular for very high-voltage systems like 220 kV and above. Utilities often use dead tank CTs in 33 kV systems. They prefer this design at 33 kV because … Read more