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Search: Posts Made By: ashiekh
Forum: PC Power Supply Discussion 10 Hours Ago
Replies: 107
Views: 2,000
Posted By ashiekh
Thank you for the explanation; out here I am the...

Thank you for the explanation; out here I am the one who fixes the car, so I forget that not everyone can do as they please with the car.
Forum: PC Power Supply Discussion 14 Hours Ago
Replies: 107
Views: 2,000
Posted By ashiekh
The Engineers cut it very close; the peak to peak...

The Engineers cut it very close; the peak to peak time is 8ms for 60Hz, 10ms for 50Hz
Forum: PC Power Supply Discussion 15 Hours Ago
Replies: 107
Views: 2,000
Posted By ashiekh
Same here! What I meant is that a friend...

Same here!

What I meant is that a friend allows you to borrow theirs for an evening; I'm just trying to locate zero cost solutions to testing. One could even do the whole thing with jumper leads...
Forum: PC Power Supply Discussion 16 Hours Ago
Replies: 107
Views: 2,000
Posted By ashiekh
I don't see the relevance here of hold-up time,...

I don't see the relevance here of hold-up time, since the problem was with UPS over-load. Even so 12ms is less than the 16ms Per Hansson says is called for by the ATX specs, and your electricity runs...
Forum: PC Power Supply Discussion 16 Hours Ago
Replies: 107
Views: 2,000
Posted By ashiekh
Just for the record, I don't think the following...

Just for the record, I don't think the following are responsible for what you see

* damaged bulk capacitor
* relays slowing with time

I don't see how a damaged bulk capacitor would increase...
Forum: PC Power Supply Discussion 1 Day Ago
Replies: 107
Views: 2,000
Posted By ashiekh
I would also like to thank Per Hansson, as I had...

I would also like to thank Per Hansson, as I had no idea about all these issues with the interaction of rectangular wave UPSs and Active PFC power supplies.
Forum: PC Power Supply Discussion 1 Day Ago
Replies: 107
Views: 2,000
Posted By ashiekh
I don't think the problem is holdup time; I...

I don't think the problem is holdup time; I suspect the issue is refilling the partially empty capacitors (with a hot NTC resistor) is overloading the UPS. This was proposed earlier in this thread,...
Forum: PC Power Supply Discussion 1 Day Ago
Replies: 107
Views: 2,000
Posted By ashiekh
As I understand it, it was the UPS that declared...

As I understand it, it was the UPS that declared overload (after aging over a year), so perhaps I should have put this APFC issue in a thread of its own. Mixing the two was not very clever on my...
Forum: PC Power Supply Discussion 2 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
Found the CyberPower quote ...

Found the CyberPower quote

https://www.cyberpowersystems.com/promotions/gx1325u-gaming-ups/

"
POWER OUTPUT
ACTIVE PFC COMPATIBLE

Many gaming systems use an energy efficient Active Power...
Forum: PC Power Supply Discussion 2 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
Which remains significant if it really is in a...

Which remains significant if it really is in a script



Used to work on the Navajo Nation (Arizona), and there one really needs a UPS; most of them were units I collected when they were retired....
Forum: PC Power Supply Discussion 2 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
None intended on my part There is...

None intended on my part



There is truth in that, but this is claimed to come from CyberPower Tech Support



I have 12 UPS units, of which 5 are sine-wave (one is ferro-resonant); but none...
Forum: PC Power Supply Discussion 2 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
You were right all along, and may need a...

You were right all along, and may need a sine-wave UPS

...
Forum: PC Power Supply Discussion 2 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
Keep us posted if the problem appears later when...

Keep us posted if the problem appears later when using the FSP (on the UPS), which would suggest an ailing battery.
Forum: PC Power Supply Discussion 2 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
So, did you finally decide in what direction to...

So, did you finally decide in what direction to proceed?

Pity you can't borrow a car battery to figure out if the UPS battery is at fault. The scientific method needs both theory and experiment;...
Forum: PC Power Supply Discussion 3 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
Going back to the supposed Li-Ion APS ...

Going back to the supposed Li-Ion APS
https://www.amazon.in/APC-BX600C-600VA-230V-Back/dp/B016XVRKZM
Claims a 4.20 Watt Hours battery; that is way too small

The APC site seems to suggest it...
Forum: PC Power Supply Discussion 3 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
$119 here (with free shipping) ...

$119 here (with free shipping)
https://energizedoutdoors.com/collections/lifepo4-battery/products/12v-20ah-lifepo4-battery

I have an APC Smart-UPS 1000 I modified to take these batteries, as they...
Forum: PC Power Supply Discussion 4 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
Even more fun ...

Even more fun

http://www.apc.com/us/en/faqs/FA158934/
"It is not recommended that the load exceed 80 percent of the UPS unit’s rated capacity"

* So your 360W unit should not be run above 290W...
Forum: PC Power Supply Discussion 4 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
I doubt the CX550 is defective

I doubt the CX550 is defective
Forum: Off Topic 4 Days Ago
Replies: 29
Views: 964
Posted By ashiekh
Or a review of a DC ATX power supply might be...

Or a review of a DC ATX power supply might be fun, for the solar powered mining rig... or maybe a switched mode car battery charger
Forum: PC Power Supply Discussion 4 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
Not here to make trouble ...

Not here to make trouble

https://www.iball.co.in/Product/Technology-Accessories/Power-Protection/Line-Interactive-UPS/Nirantar-UPS-621V/183

Transfer Time - 4-8ms
Forum: PC Power Supply Discussion 4 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
Do you also have the computer monitor connected...

Do you also have the computer monitor connected to the UPS?
Forum: PC Power Supply Discussion 5 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
The 'scope plots seem to show the max voltage is...

The 'scope plots seem to show the max voltage is not so high, the DMM readings otherwise; you explained that in terms of active PFC which I find fascinating (if correct). Then again, I haven't heard...
Forum: PC Power Supply Discussion 5 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
This is most interesting, so does that mean the...

This is most interesting, so does that mean the issue lies with active PFC? and not an over-voltage on the part of the UPS. At one point you were blaming the UPS.



This is all about learning...
Forum: PC Power Supply Discussion 5 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
You are probably right, but let's do a small...

You are probably right, but let's do a small calculation

* The energy in a capacitor is 0.5 C V^2; lets take two 470uF at 200V each; that's about 20J

* Now lets take 300W for 1/120 th of a...
Forum: PC Power Supply Discussion 5 Days Ago
Replies: 107
Views: 2,000
Posted By ashiekh
I have been known to spend as much changing the...

I have been known to spend as much changing the capacitors on a power supply as a new supply would cost, since the end result was better than new (in my opinion).

But in your case a new Li-ion UPS...
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