And placing them in parallel doubles their capacitance?
Will placing caps in series double their voltage rating?
Collapse
X
-
Re: Will placing caps in series double their voltage rating?
Yes, provided they're the same voltage and capacity rating. When in series it's often recommended to connect resistors in parallel to balance the voltage on the capacitors and to drain them when the circuit is disconnected.
See this: http://www.aikenamps.com/AddingComponents.htm -
Re: Will placing caps in series double their voltage rating?
Remember though two caps in series have half the effective capacitance.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Will placing caps in series double their voltage rating?
And putting two equal caps in series doubles their effective impedance.PeteS in CA
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
****************************
To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
****************************Comment
-
Re: Will placing caps in series double their voltage rating?
If I recall my CET schooling correctly I don't think connecting capacitors in series will increase their voltage rating. Correct me if I'm wrong but that rating is the maximum voltage before damage to the device becomes probable. While their effective impedience becomes less and therefore the voltage drop across them is less, the absolute voltage rating does not change. Placing two 120 volt caps in a series circuit should allow you to safely place 240 volts across the whole but the actual maximum remains unchanged. So my sense of this question says no, placing caps in series will not change their voltage rating.
Ratjaws@aol.com 051712Comment
-
Re: Will placing caps in series double their voltage rating?
Well, if you think of the input circuit of a non-PFC P/S set for 240VAC, after the bridge rectifier you have two 200V capacitors in series. If 240VAC is applied, there is ~335V across those two capacitors. So clearly series-connecting capacitors of equal value and equal maximum voltage increases themaximum voltage of the circuit. Further, I have worked with P/S companies and in P/S groups for nearly 30 years, so far. I know that the design maximum AC voltage for such an input circuit is 264VAC, a DC voltaage across the capacitors of ~370V, or nearly double the 200V rating of tthe capacitors (and don't forget that electrolytic capacitors have a capacitance tolerance of +/-20%).PeteS in CA
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
****************************
To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
****************************Comment
-
Re: Will placing caps in series double their voltage rating?
If I recall my CET schooling correctly I don't think connecting capacitors in series will increase their voltage rating. Correct me if I'm wrong but that rating is the maximum voltage before damage to the device becomes probable. While their effective impedience becomes less and therefore the voltage drop across them is less, the absolute voltage rating does not change. Placing two 120 volt caps in a series circuit should allow you to safely place 240 volts across the whole but the actual maximum remains unchanged. So my sense of this question says no, placing caps in series will not change their voltage rating.
Ratjaws@aol.com 051712
the voltage rating is based on the life tests conducted by capacitor manufacturers that allows them to estimate the minimum life of capacitors under maximum operating conditions.Comment
Related Topics
Collapse
-
by momakaI know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.
For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).
https://www.badcaps.net/filedata/fetch?id=3591771
https://www.badcaps.net/filedata/fetch?id=3591772
It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:
https://www.badcaps.net/filedata/fetch?id=359177... -
by momakaNormally, I never post repairs this quick after I do them, because… I am usually very slow.
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though.
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
-
Channel: Troubleshooting Computer Displays
-
-
by Perry BabinI think this has been answered but I couldn't find the thread.
Someone asked me if it would harm a capacitor (10F [not a typo], 24v) if it was operated on nothing more than 12v.
So, I ask... Does it change any of the capacitor's characteristics/parameters/? in any way if it is never operated near rated voltage?
If operated for years at 1/2 rated voltage, does it accept full rated voltage like it would if it had always been operated at the higher voltage?
Or would it require reforming?-
Channel: General Capacitor Questions & Issues
-
-
by quicknameI'd like to start out by thanking this forum for providing the info to be able to repair my 15 year old CP1500AVRLCD UPS. Here is all the info I gathered during my trouble-shooting and re-capping.
Like clockwork, I've had to replace the SLA batteries every 4 years. It was about that time and the UPS was acting like it needed new batteries... randomly shutting off with AC present, not being able to charge fully, and poor runtime when AC was removed. So, I replaced the batteries but noticed that it was not charging properly.
I decided to verify that the batteries were... -
Howdy folks,
I have an Optiplex GX260 that blew a couple of those troublesome Nichicon HM series (ultra low ESR) electrolytic capacitors. Because said caps are obsolete, they are pretty much impossible to find on the market; I did find a listing for some but I believe they are counterfeit. I feel the easiest thing to do would be to replace all the blown caps with polymer ones. I am by no means an expert in electronics, and I've found a fair bit of conflicting information, so any guidance or confirmation would be greatly appreciated. While from a practical standpoint it's not worth...-
Channel: General Capacitor Questions & Issues
-
- Loading...
- No more items.
Comment