Quote from: minefarmbuy on February 05, 2019, 03:12:31 PM

So running these on 240v is a bad idea?

One guy had two psu fails.

ConnerM

He was doing just over 240 volts.

Quote from: NotFuzzyWarm on February 05, 2019, 03:45:07 PM

@Phil, since you opened the regulator to look at it, does it use relays to change taps or is it solid-state (SCR's/Triacs)?
Long ago I tried a el-cheapo regulator like this one and found it unusable because of too-small transformer and the relay switching times. Every time it would make an adjustment the momentary v drop as the relays switched would cause the miner to go offline. My solution was to use a programmable dual-conversion UPS like the TrippLite SU6000RT4UHV6kVA that is always on-line and has zero transfer time. It's in/out eff is pretty good at a measured 97%.

Ah this is complicated but here goes. I am color blind so I never was able to do formal training in electronics. But I have a decent knowledge of parts and gear. They took one leg of the 240 in and run it directly to the outlets. So if you have a hot 240 like I do one leg is not altered at all.

The other leg goes into a torrid transformer a 110 to 100 volt.

So this means a 122 leg goes in and it is not touched.
The other 122 jet goes in and is dropped by the transformer to 100
It then feeds into some relays and parts that drop to 98 and the 98 plus 122 = 220.

So the legs are not even but they sum close to 220 vs 238-243
And only one leg runs into the transformer.

Also they lift the ground which is not exactly how I would do it.

I cut the two prong plug 🔌 and put a three prong plug. I still lifted ground but I think I will add back ground.

The design does allow for a lessor transformer . But looking at wires gauge and other parts I think it wont do two units.

Since only one s15 user has had the psu burn (two of 15 to be exact) . Maybe it was just a couple of shitty psu's. Meaning these regulators are not needed at all.