Question

MCQ (100)
Q3. It is the minimum current at which the fuse element
melts and thus disconnects the circuit protected by
it.
(A) Critical Current
(B) Fusing Current
(C) Breaking Current
(D) Melting Current​

Answer 1

The minimum current at which the fuse element melts and also disconnects the circuit protected by it is the Fusing Current.

• The value of a fusing current is generally greater than the current fuse item rating.
• The estimated relationship between current fusion and wire diameter for a circular wire is I = kd`3/2.
• In the formula, k is the constant and is known as fuse constant, d is the wire diameter and I is the fusing current