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What is meant by fusing current?
When current flows more than its rating wires of fuse melts and it causes current interruption. The minimum value of current which cause to melt fuse is called fusing current. Fusing current is the current required to melt the wire which is inside the fuse. If you see a fuse, inside that there will be a wire.
What is fusing factor Mcq?
Fusing factor of a fuse is defined as the ratio of. Maximum fusing current to the prospective current. Maximum fusing current to the cutoff current. Minimum fusing current to the rated carrying current.
What is the purpose of fusing?
The fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong.
Why the value of fusing factor is always more than 1?
Minimum fusing current is the minimum value of current due to which fuse melts. The current rating of the fuse is the maximum value of current due to which fuse does not get melted. The fusing factor of a fuse is always more than 1.
What is the fuse rating?
The maximum value of safe current allowed to flow through a fuse wire before it melts is called fuse rating. If a fuse of higher rating is used, it will not blow and protection of the circuit will be achieved. If a fuse of lower rating is used, it will blow before the circuit is fully loaded.
What should be fusing factor?
Detailed Solution. Fusing Factor: The fusing factor is the ratio of minimum fusing current and current rating of the fuse. Minimum fusing current is the minimum value of current due to which fuse melts.
What is the value of fusing factor?
Fusing Factor This is the ratio of minimum fusing current and current rating of the fuse. Therefore, fusing factor = Minimum fusing current or current rating of the fuse. The value of the fusing factor is always more than 1.
How do you calculate fuse factor?
Fusing factor Formula = Minimum fusing current / Current rating of fuse element
- The value of fusing current is always more than 1.
- The higher the fusing factor, the lesser is the difficulty in avoiding deterioration and vice versa.
How is fusing factor calculated?
Fusing factor = minimum fusing current / current rating of fusing element. Its value is always more than 1 one.
What is the fusing factor of a fuse?
It is the Ratio of minimum fusing current to the current rating of the fuse. There are 3 Types of fuse as per their fusing factor. Class K: Having a fusing factor more than 1.75.
What is the ratio of fusing current and current rating called?
The ratio of minimum fusing current and the current rating of fusing element is called the fusing factor. Fusing factor = minimum fusing current / current rating of fusing element.
Why are fuses not often used any more?
Fuses are not much used any more, because they are dangerous. The burnout current is only approximate, for example. Also, a fuse cannot be repaired or reset.
Is the fusing factor useful for inrush curents?
A fusing factor is useful in dealing with inrush curents but it certainly isn’t the origin of it. Now the advice we are given in order to avoid over heating our supply cables generally, is to avoid small amounts of over-current for a long duration.