When the wire is short circuited, whether the fuse blows first or the wire blows first after high te

Depending on the situation, under normal circumstances, the fuse blows first, because the circuit short circuit will cause an accident, the purpose of installing the fuse is to avoid the occurrence of accidents, so the fuse will blow immediately when the circuit is short-circuited, cut off the circuit to play a protective role, if the wire will blow itself before the fuse takes effect when the circuit is short-circuited, then the fuse is wasted, and it is useless to install it. But of course, there are special circumstances, and some places will also use such a circuit due to special needs - the watchtower.

It depends on the quality of the fuse model, if the sensitivity is high, the fuse will be broken before the wire is blown out.

First of all, the fuse is related to the temperature and the melting point and melting point: the wire is generally copper wire, which has a high melting point, while the fuse is made of alloys with extremely low melting points for metals - Wood alloy, lead-antimony alloy. Temperature:

The wire and the fuse are connected in series, w=i 0 5rt, the time is the same, the current is the same, then compare the resistance of the two, the resistance of the fuse is much greater than that of the wire, you must know that copper is the second best conductive metal (the first is silver), and the specific heat capacity of the fuse is very small, and the temperature rises very quickly, so it must be the fuse that blows first I hope it can help you.

In the regular line, the fuse is blown first, and the wire is blown first, which means that the insurance is not properly selected. The purpose of installing insurance is to prevent the line from overloading, and the heating of the wire also belongs to the line overload, otherwise it is meaningless to install insurance, and it is better not to install it. The potential danger of wire heating is that it is easy to cause disasters.

Hello, dear, the car master for your service, attentive, careful, attentive brother infiltration for you to answer, for you to find the corresponding problem solutions and solutions, will provide you with a satisfactory answer! Hopefully, this answer will help you. Hello, if the line of the vehicle is broken, as long as the relevant connection line is not hit, then this will not burn the fuse.

First, if the line is broken and directly inside the ** bundle, then this will not cause problems with the fuse. Second, unless the line touches the position of the vehicle iron, the circuit is broken by long-term friction. This will cause the fuse of the lead ridge vehicle to blow out, in this case, replace the fuse with a new one, and then dispose of the wiring.

Summary. Wait a minute, kiss, I'm typing to reply to you.

Wait a minute, kiss, I'm typing to reply to you.

1.Check whether there is a short circuit in the wiring at the back end of the power supply [fuse] used.

2.Check whether there is a short circuit in the electrical equipment on the circuit at the back end of the power supply [fuse] used.

3.Check whether the load at the back end of the power supply [fuse] used is too large, and whether the capacity of the fuse is large and the overload current is doubled. 4..

Check whether the specified group of power supply [fuse] used for rent is tightened to avoid poor contact. 5..Check whether the fuses used are produced by regular factories and meet the standards.

In the event of a short circuit, the current will be very large.

According to Ohm's law, the current is equal to the voltage divided by the resistance, when the short circuit, the voltage does not change, the resistance is close to zero, so that the current is very large, a large current, flowing through the fuse, the fuse will be very hot, and the main material of the Baoheng fast fuse is tin, its melting point is extremely low, so it is fused.

When the circuit fuse (chip) is blown out, do not replace () a. with copper wire and iron wireThe statement is wrong.

b.That's right.

Correct answer: B

Summary. Kiss, <>

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I am glad to answer for you, fuse short circuit: fuse blow, is a common phenomenon, the common situation is a short circuit fault on the line side, resulting in the fuse can not bear. Fuse overload:

If the load current exceeds the rated current of the fuse, the fuse will be blown by heating for a long time. Current pulse: When a circuit is started or the power supply is unstable, a transient high current causes the fuse to blow.

Untightened damage: Failure to tighten or damage to the screw during fuse installation can cause the fuse wire to blow. The fuse will blow.

Under what conditions the fuse blows.

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I am glad to answer for you, fuse short circuit: fuse blow, is a common phenomenon, the common situation is a short circuit fault on the line side, resulting in the fuse can not bear. Fuse overload:

If the load current exceeds the rated current of the fuse, the fuse will be blown by heating for a long time. Current pulse: When the circuit is started or the power supply is unstable, an instantaneous high current causes the Baozhou wide hidden fuse to blow.

Untightened damage: Failure to tighten or damage to the screw during fuse installation can cause the fuse wire to blow. Under the condition that the fuse will blow.

Kiss, <>

The fuse is also known as the current fuse, and the IEC127 standard defines it as a fuse. It mainly plays the role of overload protection. If the fuse is correctly placed in the circuit, the fuse will fuse itself to cut off the current when the current rises abnormally to a certain height and heat, so as to protect the safe operation of the circuit.

Invented by Edison more than 100 years ago, the Calico fuse was used to protect the expensive incandescent lamps of the time, and with the development of the times, the fuse protected the power equipment from overcurrent and overheating, and avoided serious damage caused by internal failures of electronic equipment. ”<

Because the fuse blowing current is usually a multiple of the maximum current of the circuit operation. Such a large fuse blow indicates that a short circuit must have occurred in the circuit to produce such a large current.

Not necessarily, the fuse is not well connected, and the connection is seriously heated, which will also cause blowing.

A blown fuse is not necessarily a short circuit somewhere in the circuit. In general lines, the fuse has two functions: short-circuit protection and overload protection.

A fuse is a conductor with a low melting point, and when the current is too high, the temperature rises to a certain value, and the fuse is blown and the circuit is cut off. Therefore, in addition to the occurrence of a short circuit (at this time, the current is particularly large, the fuse will blow in a very short time, which is its short-circuit protection function), if the power consumption is too large and lasts for a period of time, the temperature of the fuse may also gradually rise to the melting point and blow, which is the overload protection function of the fuse.

When there is a short circuit, the current will be very large (the current is equal to the voltage divided by the resistance, and when the short circuit is short, the resistance is close to zero), and the current will be very large, flowing through the fuse, the fuse will be very hot, and the main material of the fuse is tin, which has a very low melting point, so it will be blown off.

There was a short circuit, so the loop current was very large, and the fuse heated up badly, and it began to melt, and it broke.

The fuse is an alloy, the composition is bismuth 38 50, lead 25 31, tin cadmium, low melting point (60 70), so used in the circuit, if the circuit is overloaded, it will produce a lot of heat, so that the fuse is blown, and the effect of cutting off the circuit and the insurance.