Electrical Engineering - Voltage, Current and Resistance - Discussion
Discussion Forum : Voltage, Current and Resistance - General Questions (Q.No. 25)
25.
The current in a given circuit is not to exceed 24 A. Which value of fuse is best?
Discussion:
20 comments Page 1 of 2.
Haris said:
5 years ago
For 24A Current we cannot use 24 A Fuse.
Let's understand this concept:
P=IV => 24A*230V= 5,520W
P=IV => 25A*230V= 5750W.
According to a selection of fuse Parameters:
For Power Rating less than 5520W we can use 24A Fuse.
But for power rating Greater than and equal to 5520W, we would use a fuse rating greater than 24A like 25A fuse.
Let's understand this concept:
P=IV => 24A*230V= 5,520W
P=IV => 25A*230V= 5750W.
According to a selection of fuse Parameters:
For Power Rating less than 5520W we can use 24A Fuse.
But for power rating Greater than and equal to 5520W, we would use a fuse rating greater than 24A like 25A fuse.
(5)
Sakthiraja m said:
6 years ago
24A is correct because in the faulty condition the current flow in the circuit is above 24A. So it situation we choose 20A fuse the circuit will damage so when a current value is 24A means the fuse will be selected at above 24A is the best one.
Vijay said:
7 years ago
Every conductor in electrical system has overloading capacity if we use 24A fuse it is going to melt beyond 24A so the correct option is 20A.
(2)
Shrijith jain said:
8 years ago
As mentioned in the question that not to exceed above 24 amps so suitable option is 'D'. But the rating of any fuse is calculated as below.
Fuse rating = (Power/Voltage) x 125%.
Fuse rating = (Power/Voltage) x 125%.
(1)
Shrijith jain said:
8 years ago
As mentioned in the question that not to exceed above 24 amps so suitable option is 'D'. But the rating of any fuse is calculated as below.
Fuse rating = (Power/Voltage) x 125%.
Fuse rating = (Power/Voltage) x 125%.
Rahul said:
9 years ago
Fuse always use for low current.
T.Ramachandran said:
9 years ago
Fuse is used as a protective device. Here we have to permit current up to 24A. So the fuse should permit the current up to 24A and beyond that the fuse should get melt and circuit get broken.
Gautam said:
1 decade ago
The best option is 20A. Because. A 24A fuse will not break at 24. And also it is good for the circuit to keep the current somewhat below max related current.
(1)
RAM GOPAL said:
1 decade ago
If we use the fuse having rating 20A the fuse blown at 20A CURRENT but the question is that the fuse does not exceed the 24A so best option is 24A.
Arun crackbrains said:
1 decade ago
The best option is 20A. Because. A 24A fuse will not break at 24. And also it is good for the circuit to keep the current somewhat below max related current.
(1)
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