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Slow And Fuse

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11 Threads found on Slow And Fuse
I would prefer ProgISP software with USBasp programmer. Khazma acts as a malicious file for me. You may have a try with ProgISP. Cross check your connections from Programmer to the Device. Confirm the device is powered with USB or External. See that you are using "slow clock" mode with the Jumper closed. Confirm the Crystal and reset circuit is con
Hello, Will this 3A fuse..(farnell 2309084) ..and its fuse holder as follows...(farnell 1271691) ..will these be OK to carry the 1.9A RMS ,
All depend what fuse should protect, what circuit and device. What is inrush current? Do you have some inductance in circuit? If your circuit have max 4A of current then fuse must be higher then 4A. Best use multimeter (ampermeter) to monitor current. You can use slow or fast fuse depence from
Is it a very-fast-blow fuse? Maybe the input capacitor surge is causing the failure. Try a slow-blow fuse just for testing. and did you actually measure a short from ac to bridge output with an ohmmeter?
Actually it?s very difficult to estimate the real damages for this situation. First you need to do some measurements and based on partial schematics to discover additional burnt components. If you are lucky, try to replace the burnt strip in the circuit by a 5 Amps slow blow fuse, replace the varistor ( temporary you may leave the circuit (...)
Roughly, if transformer?s power rating is 60VA and voltage is 120Vac, the primary current for the nominal load is somewhere around 120/60=> 0.5A .. Add 10% for transformer?s efficiency and multiply by 2 .. Use "slow-blow" fuses .. :wink: IanP
fuses protect from over-current, and they can be slow (as it was mentioned already). For example, a short current spike may or may not blow the fuse.
The fuse rating depends on the load current and not the load volatge. The fuse is not exposed to the load voltage. You get fast and slow blow fuses. The fuse current rating must be the staedy state load current. By picking a slow blow fuse (...)
What is the basic working principle for this, Is it so that when current goes beyond the rated value its resistance increases , but whether this process is instantaneous or slow, and where it has got its best use.
As overvoltage protectionyou can use a zener dioda and SCR in the classic CROW-BAR configuration .. see picture below .. As overcurrent protection you can use just simple slow-blow fuse (will also work with crow-bar), or, if you want to add more components, an electronic fuse .. Rega
hmmm what about slow blow fuse? that works too. You need to be more specific as to what your needs are