Why does a 100 amp fuse blow?
Here are some reasons a main fuse (say 100A) blows instead of a branch fuse (rated at 15A, for instance): A high-resistance connection at or near the main fuse heats its fusible element by thermal conduction to its melting point. The heat injected into the fusible element causes it to blow.
Can over voltage blow a fuse?
If you pass to much current the SI of current is the Ampere, so fuses are rated in A(amperes). If you overload your circuit, using it too much, or too hard really. Or there is a shortcut anywhere making very large amounts of current flow, the fuse will break.
What is the reason why my amplifier keep blowing fuses?
The immediate answer I can tell you without seeing the schematics and details is that your load is drawing too much current, and therefore your fuse blows each time. Fuses usually blow due to high current surges.
How long does it take for a fuse to blow?
At 110% of max current it will blow in around 4 hours. At 135% rated current, it will blow in 1 hour. At 200% rated current it will blow in 1 second maximum. A “Slo-Blow” style fuse is constructed so they can take a 200% overload for a minimum of 5 seconds before they blow.
When does the fuse blow on a 10 Amp motor?
You may use a 10 amp fuse on a motor that draws 8 amps continous, but the start-up current may be 20-25 amps for 2 seconds until the motor comes up to speed. In this case you want the fuse to be able to withstand the start-up time, but if the motor is stalled, after 5-10 seconds the fuse will blow.
What is the breakdown voltage of a fuse?
Fuses have 2 ratings, Rated current and breakdown voltage. The rated current is pretty self explanitory, that is the maximum current that the fuse will pass indefinately without blowing. The breakdown voltage is the maximum voltage you can put on the fuse, such that after it blows, the gap between the two burned out parts will not arc across.
How many amps are in a fast blow fuse?
For example, if your motor draws 10 amps at Full Throttle, use 5 or 6 amp “Fast Blow” fuses in each phase of the controller output.
How big of a fuse do I need for a 120V amplifier?
Fuses are rated in amps. Most fuses for household items are 250V. We are told that we can use 250V fuses of the same amperage rating for our nominal 120V circuits. Thus, if I need a 5 amp fuse for an amplifier I get a 250V 5 amp fuse. What I don’t fully understand is how the 250v fuse properly protects my 120v circuit.
What happens when a 5 Amp Fuse is used?
First, a 5 amp fuse is meant to withstand a 5 amp current draw for an amount of time determined by the type of fuse, fast or slow blow. If the current draw excedes 5 amps (for an amount of time that excedes the fuse’s limit), then the fuse will interrupt the circuit.
What is the 120 amp fuse on a Toyota?
The 120 amp fuse is the 82620-33030 numbered one. The car will start with this fuse open, but you will have weird symptoms on the dash and the battery will not be charge as the alternator isn’t connected to the battery. Accident w/frame damage, got rid of car. No Toyota in possession, now. Where under the dash– I will get out the book.