inrush current

[Extralarstig]

Hey guys,

I use regular 10A 5x20 fuses to secure my miners on the socket. Never had any problems with the S9's but the S15 and S17 models keep blowing from time to time.. Which is weird because the difference in power between the S9 and S15 is not that big.

So i was thinking it might be the inrush current of the power supply's. Does anyone have any figures on how big these can be? And do they also occur when the miner reboots?

thanks a lot,

Lars

[1714902332]

1714902332

[1714902332]

1714902332

[BitMaxz]

Much better monitor the current power from the beginning until the miner is running.

Do you have a wattmeter plug?

It looks like this below



If you have that you can monitor why the fuse keeps blowing. Or your fuse is not actually 10A?

What I heard from others is that they use 15Amp fuse but if they use lower than that he always replace it with a new working fuse.

[mikeywith]

Much better monitor the current power from the beginning until the miner is running.
Do you have a wattmeter plug?

Will that Whatmeter read the inrush current? I can't tell for sure but I highly doubt it.

So i was thinking it might be the inrush current of the power supply's. Does anyone have any figures on how big these can be? And do they also occur when the miner reboots?

I think the inrush current for the old power supplies like the APW3 and APW7 is <= 80 amps, it's safe to assume that it's a lot higher on the S17, however, the inrush current is so fast for most fuses/breakers to act upon, if inrush current was the issue then S9 would have caused the same issue, the problem here seems to be the 10A fuse itself, you are passing it a lot, the S17 consumes about 2100w so on a 220v it draws 9.5A, the slightest drop in voltage will take it above 10A, you need 9.5*1.35 = 12A or nearest to safely run an S17, for the S15 it does about 7.5A so I think a 10A will do the job as long as the voltage doesn't drop below 220v, if it does, it will blow, you need to measure your voltage and get the lowest number and judge based on that.