Fuse wire compariosn with MCB in domestic and commercial sectors
Answers
Answer:
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Explanation:
ELECTRIC FUSE - EXAMPLE
Electric fuse protects circuits and appliances by stopping the flow of unduly high electric current. It is placed in series with the device. It consists of a piece of wire made of a metal or an alloy of appropriate melting point, i.e, aluminium, copper, iron, lead etc. If a current larger than the specified value flows through the circuit, the temperature of the fuse wire increases. This melts the fuse wire and breaks the circuit. The fuses used for domestic purposes are rated as 1 A, 2 A, 3 A, 5 A, 10 A, etc.
An MCB or miniature circuit breaker is an electromagnetic device that embodies complete enclosure in a molded insulating material. The main function of an MCB is to switch the circuit, i.e., to open the circuit (which has been connected to it) automatically when the current passing through it (MCB) exceeds the value for which it is set. It can be manually switched ON and OFF as similar to normal switch if necessary
A fuse is a safety device which prevents damages to electrical circuits and possible fires.
Wires made from some special materials melt quickly and break when large electric currents are passed through them. These wires are used for making electric fuses.
There is a maximum limit on the current which can safely flow through a circuit. If by accident the current exceeds this safe limit, the wires may become overheated and may cause fire. If a proper fuse is there in the circuit,it will blow off and prevent short- circuiting. A fuse used in the building is shown in the diagram.....