Buchholz relay is a special type of relay which is designed to detect the internal faults by monitoring the gas and oil movement in oil-immersed transformers. This relay is named after Max Buchholz in 1921. This relay is used in the transformer having the rating higher than 500KVA. Due to economic consideration, this relay is … Read more
Wave trap is a device which prevents the high-frequency carrier signals to enter the substation side. It is also known as line trap. It is connected in series with the transmission line. It is designed to carry the rated power frequency (50 Hz or 60 Hz) current, as well as to withstand the substation fault … Read more
Fuse was patented by Thomas Edison in 1890. Fuse is the simplest & cheapest device used for interrupting an electrical circuit under short circuit or excessive. The fuse element is generally made of materials having low melting point, high conductivity and least deterioration due to oxidation e.g., silver, copper etc. Definition of fuse It is … Read more
Oil circuit breakers are the oldest type of circuit breakers. The separating contacts of the oil circuit breakers are made to separate within the insulating oil which has better insulating properties than air. On the occurrence of the fault as the breaker contacts open under the oil, an arc is struck between the breaker contacts … Read more
Question: What is a Circuit Breaker? Answer. Circuit Breaker is a mechanical device designed to close or open contact members, thus closing or opening an electrical circuit under the normal or abnormal conditions. Question: How does a Circuit Breaker different from Switch? Answer. A switch is just a device when can be able to open and close … Read more
Air Blast Circuit Breaker is those kind of circuit breaker which operates in air at pressure of 20-30 kg/cm2. It is also good choice to avoid the risk of oil fire, in case of oil circuit breaker. The aim of all kind of circuit breaker is to prevent the re-establishment of arc after current zero by creating … Read more
