Table of Contents
It is not suitable for overload, at that time fuse blow off replacing of fuse takes time. During this period of lost power. The protection of fuse is not reliable.
What are advantages and disadvantages of fuses or circuit breakers?
Advantages and Disadvantages of Circuit Breakers and Fuses Fuses represent a less expensive route for overcurrent protection. They also react faster than a circuit breaker, and they are believed to be more failsafe than breakers because they contain fewer moving parts. The metal either melts or it does not.
What can be a disadvantage of fuse and MCB?
The disadvantages of fuses are that when they have operated they must be replaced. An MCB has overcome this problem since it is an automatic switch which opens in the event of an excessive current flow circuit in the circuit and can be closed when the circuit returns to normal.
What is the disadvantage of using a thick fuse wire?
Explanation: The resistance of a conductor is proportional to its length and inverse proportional to its cross-sectional area. So, If the fuse wires are thick, the larger cross section decreases the resistance across the fuse wire. So, even a high current flows through the fuse, it doesn’t blow out.
What is a disadvantage of a cartridge fuse?
Disadvantages of a cartridge fuse Risk of a one-phase trip on three-phase lines. Slow recovery time on a trip. Lack of accessories. Capable to perform only once.
What is the main advantage of using a fuse?
Cheapest type of protection. Inverse time current characteristics. Current limiting effect under short circuit conditions.
What are two advantages of using a fuse over a circuit breaker?
Fuses are simple and straight forward to use. Fuses trip faster than a circuit breaker. Fuses are initially less expensive than circuit breakers. Fuses have a smaller footprint in a control cabinet.
What are the advantages and disadvantages of Rewirable fuse?
The rewirable fuse has the advantages of replacement of fuse element without any risk. The cost of the replacement is also very less. The following are the disadvantages of the rewirable fuse. Unreliable Operation – For the working of the fuse it is essential to choose the element of suitable size.
What are the differences between fuse and MCB?
Definitions. Fuse is an electrical device that self-destructs and stops the current flow in a circuit whenever the current exceeds the predefined value. MCBs are resettable circuit protection device that, on the occurrence of faults, stops the current flow in a circuit.
Why fuses are used to prevent any kind of short circuit and overloading?
FUSES and circuit breakers are ”safety valves” built into electrical circuits to protect the wiring against overheating due to an overload or a short circuit. The fuses contain a thin strip of metal that melts if the current (or amperage) flowing through that circuit exceeds the amount for which that fuse is rated.
What is a fuse wire?
A fuse wire is a wire of a low melting point. It is connected in series with some electrical appliance or in any circuit where you want to prevent flow of excess current to safeguard a system. Ideally a fuse wire should have a small resistance. and fuse wire is blown at its melting point.
What are the possible dangers of not using a fuse in an electric circuit?
If fuse is not here in the circuit,then by any chance if the current passes through the circuit larger than the required value,it can cause severe damage to the appliances and can get the house on fire.
What are the disadvantages of HRC fuse?
Disadvantages of H.R.C Fuse: After each operation, they have to be replaced. Heat being produced by the arc may affect the associated switches.
What is electric short circuit what are its disadvantages?
When the fault occurs the short circuit current passes through the fuse element. The magnitude of the current is much high as compared to the normal current. The short circuit current generates excessive heat in the fuse element. Thereby, the element becomes melts and break.
What is the main advantages of using a fuse Mcq?
Cheapest type of protection. Current limiting effect under short circuit conditions.
What is fuse and its uses?
In electrical and electronics, a fuse is defined as an electrical safety device that provides over-current protection to the functional electrical circuit. The major uses of fuse are: It prevents short circuits. It acts as a barrier between the human body and electric current. It prevents overload and blackouts.
Why fuse is not reliable protection?
The use of fuses can represent a safety risk for technical personnel. Due to exposed conductors, replacement of fuses can be dangerous for unskilled people. The connections to circuit breakers are hidden behind the device, and operation can be done remotely. This makes breakers safer, especially for unskilled workers.
Why MCB’s are used in place of fuses in homes & offices nowadays?
Explanation: MCB’s prevent the chances of shock in case if electricity increases MCB fell down and the electricity is stopped preventing any kind of shock. In fuse if electricity increase it may burn the wires or give shock. And it is electrically safe to hold mcb as compared to fuse.
What are the precautions that should be taken while using fuse in domestic electrification?
15 Safety Precautions When Working With Electricity Avoid water at all times when working with electricity. Never use equipment with frayed cords, damaged insulation, or broken plugs. If you are working on any receptacle at your home then always turn off the mains. Always use insulated tools while working.
