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Old 19th November 2013, 09:56 AM   #2571
Zen Mod is offline Zen Mod  Serbia
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sorry , my mistake

then , with 800VA Donut , that amount of capacity is fine

that change fuse value - needing something in range of 800/230 , so 4A seems fine
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Old 19th November 2013, 10:02 AM   #2572
Mallard is offline Mallard  Germany
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And actually I planned to use CL30 NTC which has 2.5R and 8A. (like Mr.Pass recommended it)

But wat does it mean for the R ind the CCRCC configuration? Still .1R ok?


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sorry , my mistake

then , with 800VA Donut , that amount of capacity is fine

that change fuse value - needing something in range of 800/230 , so 4A seems fine
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Old 19th November 2013, 10:05 AM   #2573
Zen Mod is offline Zen Mod  Serbia
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NP is using CL60 , in 115Vac mains area

my experience is that 10R NTC is better for this side of Big Splash , juicing 230Vac from wall

regarding CRC - no matter what size of cap bank is in question , I can't stand more than 0R1 in line

if Donut/Graetz size permits , I'm not using it at all
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Old 19th November 2013, 11:01 AM   #2574
AndrewT is offline AndrewT  Scotland
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Pass uses one CL60 for each 115Vac Primary.
In a 220/240Vac supply you still use one CL60 in each 110/120Vac Primary.

i.e. use two CL60 in series to feed the two series connected primaries in a 220/240Vac supply.
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Old 19th November 2013, 11:55 AM   #2575
Mallard is offline Mallard  Germany
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In the NPs F5T article is stated:

CLC? Go for it. The thermistor in series with the primary is familiar, and I
recommend the CL30 type. Of course this shows the 120V AC version. For
240V the primary coils are wired in series and the fuse value is halved.


So is there anything what speakes against CL30 from your perspective?
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Old 19th November 2013, 11:58 AM   #2576
AndrewT is offline AndrewT  Scotland
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The cold resistance is too low.
I would guess that 4 in series would be required for effective current limiting during the start up. But then I don't have the money to squander on 4 CL30 for each big transformer.
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Old 19th November 2013, 02:55 PM   #2577
Mallard is offline Mallard  Germany
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4 CL30 or one CL60?


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The cold resistance is too low.
I would guess that 4 in series would be required for effective current limiting during the start up. But then I don't have the money to squander on 4 CL30 for each big transformer.
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Old 19th November 2013, 03:54 PM   #2578
AndrewT is offline AndrewT  Scotland
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Quote:
Pass uses one CL60 for each 115Vac Primary
4 CL30 or 2 CL60
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Old 19th November 2013, 06:14 PM   #2579
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Quote:
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ZM, thanks for your reply! Is there any rule of thumb how to calculate it?
The only thing I found was: the best way to find correct valus is to simulate it. But I don't have such simulator.
This PSU Simulator is for only one positive rail. But one can play with different configurations and learn :
[url=http://www.duncanamps.com/psud2/]
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Old 21st November 2013, 05:07 PM   #2580
dhenryp is offline dhenryp  United States
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Default Where to mount PS thermal switch?

I assume the 75 decg C Thermostat Switch on the power into the xformer should be mounted on one of the heatsink. Is that correct?
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