Reply by Michael_A_Terrell●August 18, 20202020-08-18
default wrote:
>
> I have a wall-switch that disconnects the mains from the AC outlet. I
> don't trust leaving it on and unattended when I'm away.
>
> I am curious about how they do the time delay though.... If the AC
> power has been off for a time (several minutes) and I apply power the
> compressor will run right away. Yet if I switch the mains off and on
> quickly it goes into it's time delay.
>
> I figure that they must be looking at the charge on a cap that
> gradually bleeds off when power is removed - and prevents a re-start
> and goes into it's timing cycle instead. Easy to implement with a
> micro controller chip...
>
Here is a timer module for custom control systems. I will be using
one on my new well pump controls.
http://www.ebay.com/itm/383273947171
--
Never piss off an Engineer!
They don't get mad.
They don't get even.
They go for over unity! ;-)
Reply by ~misfit~●August 17, 20202020-08-17
On 17/08/2020 7:50 pm, default wrote:
> On Mon, 17 Aug 2020 17:31:43 +1200, ~misfit~
> <shaun.at.pukekohe@gmail.com> wrote:
>
>> On 12/08/2020 9:38 pm, default wrote:
>>> On Wed, 12 Aug 2020 14:35:18 +1200, ~misfit~
>>> <shaun.at.pukekohe@gmail.com> wrote:
>>>
>>>> On 12/08/2020 9:19 am, default wrote:
>>>>> On Tue, 11 Aug 2020 22:01:39 +1200, ~misfit~
>>>>> <shaun.at.pukekohe@gmail.com> wrote:
>>>>>
>>>>>> On 14/07/2020 8:08 am, etpm@whidbey.com wrote:
>>>>>>> On Mon, 13 Jul 2020 11:31:30 -0400, default <default@defaulter.net>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> I have an older window air conditioner that I'd like to hang on to for
>>>>>>>> a few more years. The name plate says it is 220 VAC and since the
>>>>>>>> power company went through and upgraded the distribution network and
>>>>>>>> replaced HT and transformers my service which had been running 210-220
>>>>>>>> volts is now a steady 250 volts and my bill is up ~15%.
>>>>>>>>
>>>>>>>> The increased consumption is tied to how much I run the AC and since
>>>>>>>> the upgrade I've already had to replace both the compressor and fan
>>>>>>>> motor run caps. The compressor one died a quiet death, and the fan
>>>>>>>> cap melted and smoked. The compressor cap went out the week they
>>>>>>>> changed the transformer and the fan cap about a month later. I put in
>>>>>>>> higher voltage ones and the AC is back on line.
>>>>>>>>
>>>>>>>> I was wondering if putting in 240 VAC to 24VAC center tapped, 10 amp
>>>>>>>> power transformer, wired to buck the voltage makes any sense?
>>>>>>> Where I live we get 250 volts pretty steadily. In my shop are
>>>>>>> several CNC machines, one of which cannot easily tolerate the 250
>>>>>>> volts. So I use two buck/boost xmfrs wired in a particular buck
>>>>>>> configuration to lower the 3 phase voltage going to that one machine.
>>>>>>> Since doing so the machine has not once alarmede out due to over
>>>>>>> voltage.
>>>>>>> I also wired up a little 120 to 12 volt xmfr in buck configuration
>>>>>>> to lower the 125 volts from the outlet to the 110 volts needed for a
>>>>>>> tube amp.
>>>>>>> There are directions online on how to select the proper sized xmfr
>>>>>>> for the load it will be seeing and how to wire the thing in buck
>>>>>>> configuration.
>>>>>>> Eric
>>>>>>>
>>>>>>
>>>>>> Eric could you please give me directions to on-line info? I'm looking at dropping the voltage to a
>>>>>> transformer so that I get lower secondaries out of it inexpensively. Single phase. My Google Fu
>>>>>> isn't very strong on this one. I remember Big Clive doing similar in one of his videos a while back
>>>>>> but have been unable to find that again.
>>>>>>
>>>>>> Cheers,
>>>>>
>>>>> See:
>>>>> https://sound-au.com/articles/buck-xfmr.htm#s30
>>>>>
>>>>> Explains "the proper way" to wire a buck boost. Both of the methods
>>>>> shown work, one is just slightly more efficient.
>>>>>
>>>>> My AC uses 7-8 amps so my 24 VCT transformer is rated at 10 amps or
>>>>> 240 VA.
>>>>
>>>> Cheers. I have a 300 VA 50v output toriod in an amplifier that I want to re-use in an amp that
>>>> needs 40 - 45v AC. I'll get to calculating...
>>>
>>> Toroids are great for that if they aren't potted. I used a pair of
>>> large toroids from a surplus store for an audio power amp. The
>>> voltage was borderline for the transistors I was using, so I wound a
>>> few turns on the core and phased it to subtract voltage. I think it
>>> was two turns of wire was ~.8 volts, and I wanted to go down 5 volts.
>>
>> Interesting thanks, I'll consider that too. It's well wrapped but I might be able to work something
>> out. It's a project I haven't touched for a wee while now.
>>
>> (I was also considering doing a small top-winding with insulated wire to get a low voltage out of
>> it for the speaker protection circuit I'd like to fit rather than buying and including a second
>> transformer in the chassis.)
>
> I used 16 AWG THHN stranded (high temp wire for conduit) and just
> wired it on the outside and subtracted the out of phase voltage from
> the secondary. Regulation may have suffered a bit but I had a lot of
> filter capacitors, and low ESR photo-flash caps.
Cheers.
--
Shaun.
"Humans will have advanced a long, long way when religious belief has a cozy little classification
in the DSM"
David Melville
This is not an email and hasn't been checked for viruses by any half-arsed self-promoting software.
Reply by default●August 17, 20202020-08-17
On Mon, 17 Aug 2020 17:31:43 +1200, ~misfit~
<shaun.at.pukekohe@gmail.com> wrote:
>On 12/08/2020 9:38 pm, default wrote:
>> On Wed, 12 Aug 2020 14:35:18 +1200, ~misfit~
>> <shaun.at.pukekohe@gmail.com> wrote:
>>
>>> On 12/08/2020 9:19 am, default wrote:
>>>> On Tue, 11 Aug 2020 22:01:39 +1200, ~misfit~
>>>> <shaun.at.pukekohe@gmail.com> wrote:
>>>>
>>>>> On 14/07/2020 8:08 am, etpm@whidbey.com wrote:
>>>>>> On Mon, 13 Jul 2020 11:31:30 -0400, default <default@defaulter.net>
>>>>>> wrote:
>>>>>>
>>>>>>> I have an older window air conditioner that I'd like to hang on to for
>>>>>>> a few more years. The name plate says it is 220 VAC and since the
>>>>>>> power company went through and upgraded the distribution network and
>>>>>>> replaced HT and transformers my service which had been running 210-220
>>>>>>> volts is now a steady 250 volts and my bill is up ~15%.
>>>>>>>
>>>>>>> The increased consumption is tied to how much I run the AC and since
>>>>>>> the upgrade I've already had to replace both the compressor and fan
>>>>>>> motor run caps. The compressor one died a quiet death, and the fan
>>>>>>> cap melted and smoked. The compressor cap went out the week they
>>>>>>> changed the transformer and the fan cap about a month later. I put in
>>>>>>> higher voltage ones and the AC is back on line.
>>>>>>>
>>>>>>> I was wondering if putting in 240 VAC to 24VAC center tapped, 10 amp
>>>>>>> power transformer, wired to buck the voltage makes any sense?
>>>>>> Where I live we get 250 volts pretty steadily. In my shop are
>>>>>> several CNC machines, one of which cannot easily tolerate the 250
>>>>>> volts. So I use two buck/boost xmfrs wired in a particular buck
>>>>>> configuration to lower the 3 phase voltage going to that one machine.
>>>>>> Since doing so the machine has not once alarmede out due to over
>>>>>> voltage.
>>>>>> I also wired up a little 120 to 12 volt xmfr in buck configuration
>>>>>> to lower the 125 volts from the outlet to the 110 volts needed for a
>>>>>> tube amp.
>>>>>> There are directions online on how to select the proper sized xmfr
>>>>>> for the load it will be seeing and how to wire the thing in buck
>>>>>> configuration.
>>>>>> Eric
>>>>>>
>>>>>
>>>>> Eric could you please give me directions to on-line info? I'm looking at dropping the voltage to a
>>>>> transformer so that I get lower secondaries out of it inexpensively. Single phase. My Google Fu
>>>>> isn't very strong on this one. I remember Big Clive doing similar in one of his videos a while back
>>>>> but have been unable to find that again.
>>>>>
>>>>> Cheers,
>>>>
>>>> See:
>>>> https://sound-au.com/articles/buck-xfmr.htm#s30
>>>>
>>>> Explains "the proper way" to wire a buck boost. Both of the methods
>>>> shown work, one is just slightly more efficient.
>>>>
>>>> My AC uses 7-8 amps so my 24 VCT transformer is rated at 10 amps or
>>>> 240 VA.
>>>
>>> Cheers. I have a 300 VA 50v output toriod in an amplifier that I want to re-use in an amp that
>>> needs 40 - 45v AC. I'll get to calculating...
>>
>> Toroids are great for that if they aren't potted. I used a pair of
>> large toroids from a surplus store for an audio power amp. The
>> voltage was borderline for the transistors I was using, so I wound a
>> few turns on the core and phased it to subtract voltage. I think it
>> was two turns of wire was ~.8 volts, and I wanted to go down 5 volts.
>
>Interesting thanks, I'll consider that too. It's well wrapped but I might be able to work something
>out. It's a project I haven't touched for a wee while now.
>
>(I was also considering doing a small top-winding with insulated wire to get a low voltage out of
>it for the speaker protection circuit I'd like to fit rather than buying and including a second
>transformer in the chassis.)
I used 16 AWG THHN stranded (high temp wire for conduit) and just
wired it on the outside and subtracted the out of phase voltage from
the secondary. Regulation may have suffered a bit but I had a lot of
filter capacitors, and low ESR photo-flash caps.
Reply by ~misfit~●August 17, 20202020-08-17
On 12/08/2020 9:38 pm, default wrote:
> On Wed, 12 Aug 2020 14:35:18 +1200, ~misfit~
> <shaun.at.pukekohe@gmail.com> wrote:
>
>> On 12/08/2020 9:19 am, default wrote:
>>> On Tue, 11 Aug 2020 22:01:39 +1200, ~misfit~
>>> <shaun.at.pukekohe@gmail.com> wrote:
>>>
>>>> On 14/07/2020 8:08 am, etpm@whidbey.com wrote:
>>>>> On Mon, 13 Jul 2020 11:31:30 -0400, default <default@defaulter.net>
>>>>> wrote:
>>>>>
>>>>>> I have an older window air conditioner that I'd like to hang on to for
>>>>>> a few more years. The name plate says it is 220 VAC and since the
>>>>>> power company went through and upgraded the distribution network and
>>>>>> replaced HT and transformers my service which had been running 210-220
>>>>>> volts is now a steady 250 volts and my bill is up ~15%.
>>>>>>
>>>>>> The increased consumption is tied to how much I run the AC and since
>>>>>> the upgrade I've already had to replace both the compressor and fan
>>>>>> motor run caps. The compressor one died a quiet death, and the fan
>>>>>> cap melted and smoked. The compressor cap went out the week they
>>>>>> changed the transformer and the fan cap about a month later. I put in
>>>>>> higher voltage ones and the AC is back on line.
>>>>>>
>>>>>> I was wondering if putting in 240 VAC to 24VAC center tapped, 10 amp
>>>>>> power transformer, wired to buck the voltage makes any sense?
>>>>> Where I live we get 250 volts pretty steadily. In my shop are
>>>>> several CNC machines, one of which cannot easily tolerate the 250
>>>>> volts. So I use two buck/boost xmfrs wired in a particular buck
>>>>> configuration to lower the 3 phase voltage going to that one machine.
>>>>> Since doing so the machine has not once alarmede out due to over
>>>>> voltage.
>>>>> I also wired up a little 120 to 12 volt xmfr in buck configuration
>>>>> to lower the 125 volts from the outlet to the 110 volts needed for a
>>>>> tube amp.
>>>>> There are directions online on how to select the proper sized xmfr
>>>>> for the load it will be seeing and how to wire the thing in buck
>>>>> configuration.
>>>>> Eric
>>>>>
>>>>
>>>> Eric could you please give me directions to on-line info? I'm looking at dropping the voltage to a
>>>> transformer so that I get lower secondaries out of it inexpensively. Single phase. My Google Fu
>>>> isn't very strong on this one. I remember Big Clive doing similar in one of his videos a while back
>>>> but have been unable to find that again.
>>>>
>>>> Cheers,
>>>
>>> See:
>>> https://sound-au.com/articles/buck-xfmr.htm#s30
>>>
>>> Explains "the proper way" to wire a buck boost. Both of the methods
>>> shown work, one is just slightly more efficient.
>>>
>>> My AC uses 7-8 amps so my 24 VCT transformer is rated at 10 amps or
>>> 240 VA.
>>
>> Cheers. I have a 300 VA 50v output toriod in an amplifier that I want to re-use in an amp that
>> needs 40 - 45v AC. I'll get to calculating...
>
> Toroids are great for that if they aren't potted. I used a pair of
> large toroids from a surplus store for an audio power amp. The
> voltage was borderline for the transistors I was using, so I wound a
> few turns on the core and phased it to subtract voltage. I think it
> was two turns of wire was ~.8 volts, and I wanted to go down 5 volts.
Interesting thanks, I'll consider that too. It's well wrapped but I might be able to work something
out. It's a project I haven't touched for a wee while now.
(I was also considering doing a small top-winding with insulated wire to get a low voltage out of
it for the speaker protection circuit I'd like to fit rather than buying and including a second
transformer in the chassis.)
--
Shaun.
"Humans will have advanced a long, long way when religious belief has a cozy little classification
in the DSM"
David Melville
This is not an email and hasn't been checked for viruses by any half-arsed self-promoting software.
Reply by default●August 12, 20202020-08-12
On Wed, 12 Aug 2020 14:35:18 +1200, ~misfit~
<shaun.at.pukekohe@gmail.com> wrote:
>On 12/08/2020 9:19 am, default wrote:
>> On Tue, 11 Aug 2020 22:01:39 +1200, ~misfit~
>> <shaun.at.pukekohe@gmail.com> wrote:
>>
>>> On 14/07/2020 8:08 am, etpm@whidbey.com wrote:
>>>> On Mon, 13 Jul 2020 11:31:30 -0400, default <default@defaulter.net>
>>>> wrote:
>>>>
>>>>> I have an older window air conditioner that I'd like to hang on to for
>>>>> a few more years. The name plate says it is 220 VAC and since the
>>>>> power company went through and upgraded the distribution network and
>>>>> replaced HT and transformers my service which had been running 210-220
>>>>> volts is now a steady 250 volts and my bill is up ~15%.
>>>>>
>>>>> The increased consumption is tied to how much I run the AC and since
>>>>> the upgrade I've already had to replace both the compressor and fan
>>>>> motor run caps. The compressor one died a quiet death, and the fan
>>>>> cap melted and smoked. The compressor cap went out the week they
>>>>> changed the transformer and the fan cap about a month later. I put in
>>>>> higher voltage ones and the AC is back on line.
>>>>>
>>>>> I was wondering if putting in 240 VAC to 24VAC center tapped, 10 amp
>>>>> power transformer, wired to buck the voltage makes any sense?
>>>> Where I live we get 250 volts pretty steadily. In my shop are
>>>> several CNC machines, one of which cannot easily tolerate the 250
>>>> volts. So I use two buck/boost xmfrs wired in a particular buck
>>>> configuration to lower the 3 phase voltage going to that one machine.
>>>> Since doing so the machine has not once alarmede out due to over
>>>> voltage.
>>>> I also wired up a little 120 to 12 volt xmfr in buck configuration
>>>> to lower the 125 volts from the outlet to the 110 volts needed for a
>>>> tube amp.
>>>> There are directions online on how to select the proper sized xmfr
>>>> for the load it will be seeing and how to wire the thing in buck
>>>> configuration.
>>>> Eric
>>>>
>>>
>>> Eric could you please give me directions to on-line info? I'm looking at dropping the voltage to a
>>> transformer so that I get lower secondaries out of it inexpensively. Single phase. My Google Fu
>>> isn't very strong on this one. I remember Big Clive doing similar in one of his videos a while back
>>> but have been unable to find that again.
>>>
>>> Cheers,
>>
>> See:
>> https://sound-au.com/articles/buck-xfmr.htm#s30
>>
>> Explains "the proper way" to wire a buck boost. Both of the methods
>> shown work, one is just slightly more efficient.
>>
>> My AC uses 7-8 amps so my 24 VCT transformer is rated at 10 amps or
>> 240 VA.
>
>Cheers. I have a 300 VA 50v output toriod in an amplifier that I want to re-use in an amp that
>needs 40 - 45v AC. I'll get to calculating...
Toroids are great for that if they aren't potted. I used a pair of
large toroids from a surplus store for an audio power amp. The
voltage was borderline for the transistors I was using, so I wound a
few turns on the core and phased it to subtract voltage. I think it
was two turns of wire was ~.8 volts, and I wanted to go down 5 volts.
Reply by ~misfit~●August 11, 20202020-08-11
On 12/08/2020 9:19 am, default wrote:
> On Tue, 11 Aug 2020 22:01:39 +1200, ~misfit~
> <shaun.at.pukekohe@gmail.com> wrote:
>
>> On 14/07/2020 8:08 am, etpm@whidbey.com wrote:
>>> On Mon, 13 Jul 2020 11:31:30 -0400, default <default@defaulter.net>
>>> wrote:
>>>
>>>> I have an older window air conditioner that I'd like to hang on to for
>>>> a few more years. The name plate says it is 220 VAC and since the
>>>> power company went through and upgraded the distribution network and
>>>> replaced HT and transformers my service which had been running 210-220
>>>> volts is now a steady 250 volts and my bill is up ~15%.
>>>>
>>>> The increased consumption is tied to how much I run the AC and since
>>>> the upgrade I've already had to replace both the compressor and fan
>>>> motor run caps. The compressor one died a quiet death, and the fan
>>>> cap melted and smoked. The compressor cap went out the week they
>>>> changed the transformer and the fan cap about a month later. I put in
>>>> higher voltage ones and the AC is back on line.
>>>>
>>>> I was wondering if putting in 240 VAC to 24VAC center tapped, 10 amp
>>>> power transformer, wired to buck the voltage makes any sense?
>>> Where I live we get 250 volts pretty steadily. In my shop are
>>> several CNC machines, one of which cannot easily tolerate the 250
>>> volts. So I use two buck/boost xmfrs wired in a particular buck
>>> configuration to lower the 3 phase voltage going to that one machine.
>>> Since doing so the machine has not once alarmede out due to over
>>> voltage.
>>> I also wired up a little 120 to 12 volt xmfr in buck configuration
>>> to lower the 125 volts from the outlet to the 110 volts needed for a
>>> tube amp.
>>> There are directions online on how to select the proper sized xmfr
>>> for the load it will be seeing and how to wire the thing in buck
>>> configuration.
>>> Eric
>>>
>>
>> Eric could you please give me directions to on-line info? I'm looking at dropping the voltage to a
>> transformer so that I get lower secondaries out of it inexpensively. Single phase. My Google Fu
>> isn't very strong on this one. I remember Big Clive doing similar in one of his videos a while back
>> but have been unable to find that again.
>>
>> Cheers,
>
> See:
> https://sound-au.com/articles/buck-xfmr.htm#s30
>
> Explains "the proper way" to wire a buck boost. Both of the methods
> shown work, one is just slightly more efficient.
>
> My AC uses 7-8 amps so my 24 VCT transformer is rated at 10 amps or
> 240 VA.
Cheers. I have a 300 VA 50v output toriod in an amplifier that I want to re-use in an amp that
needs 40 - 45v AC. I'll get to calculating...
--
Shaun.
"Humans will have advanced a long, long way when religious belief has a cozy little classification
in the DSM"
David Melville
This is not an email and hasn't been checked for viruses by any half-arsed self-promoting software.
Reply by ~misfit~●August 11, 20202020-08-11
On 12/08/2020 4:36 am, etpm@whidbey.com wrote:
> On Tue, 11 Aug 2020 22:01:39 +1200, ~misfit~
> <shaun.at.pukekohe@gmail.com> wrote:
>
>> On 14/07/2020 8:08 am, etpm@whidbey.com wrote:
>>> On Mon, 13 Jul 2020 11:31:30 -0400, default <default@defaulter.net>
>>> wrote:
>>>
>>>> I have an older window air conditioner that I'd like to hang on to for
>>>> a few more years. The name plate says it is 220 VAC and since the
>>>> power company went through and upgraded the distribution network and
>>>> replaced HT and transformers my service which had been running 210-220
>>>> volts is now a steady 250 volts and my bill is up ~15%.
>>>>
>>>> The increased consumption is tied to how much I run the AC and since
>>>> the upgrade I've already had to replace both the compressor and fan
>>>> motor run caps. The compressor one died a quiet death, and the fan
>>>> cap melted and smoked. The compressor cap went out the week they
>>>> changed the transformer and the fan cap about a month later. I put in
>>>> higher voltage ones and the AC is back on line.
>>>>
>>>> I was wondering if putting in 240 VAC to 24VAC center tapped, 10 amp
>>>> power transformer, wired to buck the voltage makes any sense?
>>> Where I live we get 250 volts pretty steadily. In my shop are
>>> several CNC machines, one of which cannot easily tolerate the 250
>>> volts. So I use two buck/boost xmfrs wired in a particular buck
>>> configuration to lower the 3 phase voltage going to that one machine.
>>> Since doing so the machine has not once alarmede out due to over
>>> voltage.
>>> I also wired up a little 120 to 12 volt xmfr in buck configuration
>>> to lower the 125 volts from the outlet to the 110 volts needed for a
>>> tube amp.
>>> There are directions online on how to select the proper sized xmfr
>>> for the load it will be seeing and how to wire the thing in buck
>>> configuration.
>>> Eric
>>>
>>
>> Eric could you please give me directions to on-line info? I'm looking at dropping the voltage to a
>> transformer so that I get lower secondaries out of it inexpensively. Single phase. My Google Fu
>> isn't very strong on this one. I remember Big Clive doing similar in one of his videos a while back
>> but have been unable to find that again.
>>
>> Cheers,
> Search for buck/boost transformer. Here's a link:
> https://www.federalpacific.com/tools/buck-boost-transformer-calculator-selector/
> Search youtube too, there are lots of videos expalining them.
> Eric
>
Thanks.
--
Shaun.
"Humans will have advanced a long, long way when religious belief has a cozy little classification
in the DSM"
David Melville
This is not an email and hasn't been checked for viruses by any half-arsed self-promoting software.
Reply by default●August 11, 20202020-08-11
On Tue, 11 Aug 2020 22:01:39 +1200, ~misfit~
<shaun.at.pukekohe@gmail.com> wrote:
>On 14/07/2020 8:08 am, etpm@whidbey.com wrote:
>> On Mon, 13 Jul 2020 11:31:30 -0400, default <default@defaulter.net>
>> wrote:
>>
>>> I have an older window air conditioner that I'd like to hang on to for
>>> a few more years. The name plate says it is 220 VAC and since the
>>> power company went through and upgraded the distribution network and
>>> replaced HT and transformers my service which had been running 210-220
>>> volts is now a steady 250 volts and my bill is up ~15%.
>>>
>>> The increased consumption is tied to how much I run the AC and since
>>> the upgrade I've already had to replace both the compressor and fan
>>> motor run caps. The compressor one died a quiet death, and the fan
>>> cap melted and smoked. The compressor cap went out the week they
>>> changed the transformer and the fan cap about a month later. I put in
>>> higher voltage ones and the AC is back on line.
>>>
>>> I was wondering if putting in 240 VAC to 24VAC center tapped, 10 amp
>>> power transformer, wired to buck the voltage makes any sense?
>> Where I live we get 250 volts pretty steadily. In my shop are
>> several CNC machines, one of which cannot easily tolerate the 250
>> volts. So I use two buck/boost xmfrs wired in a particular buck
>> configuration to lower the 3 phase voltage going to that one machine.
>> Since doing so the machine has not once alarmede out due to over
>> voltage.
>> I also wired up a little 120 to 12 volt xmfr in buck configuration
>> to lower the 125 volts from the outlet to the 110 volts needed for a
>> tube amp.
>> There are directions online on how to select the proper sized xmfr
>> for the load it will be seeing and how to wire the thing in buck
>> configuration.
>> Eric
>>
>
>Eric could you please give me directions to on-line info? I'm looking at dropping the voltage to a
>transformer so that I get lower secondaries out of it inexpensively. Single phase. My Google Fu
>isn't very strong on this one. I remember Big Clive doing similar in one of his videos a while back
>but have been unable to find that again.
>
>Cheers,
See:
https://sound-au.com/articles/buck-xfmr.htm#s30
Explains "the proper way" to wire a buck boost. Both of the methods
shown work, one is just slightly more efficient.
My AC uses 7-8 amps so my 24 VCT transformer is rated at 10 amps or
240 VA.
Reply by ●August 11, 20202020-08-11
On Tue, 11 Aug 2020 22:01:39 +1200, ~misfit~
<shaun.at.pukekohe@gmail.com> wrote:
>On 14/07/2020 8:08 am, etpm@whidbey.com wrote:
>> On Mon, 13 Jul 2020 11:31:30 -0400, default <default@defaulter.net>
>> wrote:
>>
>>> I have an older window air conditioner that I'd like to hang on to for
>>> a few more years. The name plate says it is 220 VAC and since the
>>> power company went through and upgraded the distribution network and
>>> replaced HT and transformers my service which had been running 210-220
>>> volts is now a steady 250 volts and my bill is up ~15%.
>>>
>>> The increased consumption is tied to how much I run the AC and since
>>> the upgrade I've already had to replace both the compressor and fan
>>> motor run caps. The compressor one died a quiet death, and the fan
>>> cap melted and smoked. The compressor cap went out the week they
>>> changed the transformer and the fan cap about a month later. I put in
>>> higher voltage ones and the AC is back on line.
>>>
>>> I was wondering if putting in 240 VAC to 24VAC center tapped, 10 amp
>>> power transformer, wired to buck the voltage makes any sense?
>> Where I live we get 250 volts pretty steadily. In my shop are
>> several CNC machines, one of which cannot easily tolerate the 250
>> volts. So I use two buck/boost xmfrs wired in a particular buck
>> configuration to lower the 3 phase voltage going to that one machine.
>> Since doing so the machine has not once alarmede out due to over
>> voltage.
>> I also wired up a little 120 to 12 volt xmfr in buck configuration
>> to lower the 125 volts from the outlet to the 110 volts needed for a
>> tube amp.
>> There are directions online on how to select the proper sized xmfr
>> for the load it will be seeing and how to wire the thing in buck
>> configuration.
>> Eric
>>
>
>Eric could you please give me directions to on-line info? I'm looking at dropping the voltage to a
>transformer so that I get lower secondaries out of it inexpensively. Single phase. My Google Fu
>isn't very strong on this one. I remember Big Clive doing similar in one of his videos a while back
>but have been unable to find that again.
>
>Cheers,
On Tue, 11 Aug 2020 22:01:39 +1200, ~misfit~
<shaun.at.pukekohe@gmail.com> wrote:
>On 14/07/2020 8:08 am, etpm@whidbey.com wrote:
>> On Mon, 13 Jul 2020 11:31:30 -0400, default <default@defaulter.net>
>> wrote:
>>
>>> I have an older window air conditioner that I'd like to hang on to for
>>> a few more years. The name plate says it is 220 VAC and since the
>>> power company went through and upgraded the distribution network and
>>> replaced HT and transformers my service which had been running 210-220
>>> volts is now a steady 250 volts and my bill is up ~15%.
>>>
>>> The increased consumption is tied to how much I run the AC and since
>>> the upgrade I've already had to replace both the compressor and fan
>>> motor run caps. The compressor one died a quiet death, and the fan
>>> cap melted and smoked. The compressor cap went out the week they
>>> changed the transformer and the fan cap about a month later. I put in
>>> higher voltage ones and the AC is back on line.
>>>
>>> I was wondering if putting in 240 VAC to 24VAC center tapped, 10 amp
>>> power transformer, wired to buck the voltage makes any sense?
>> Where I live we get 250 volts pretty steadily. In my shop are
>> several CNC machines, one of which cannot easily tolerate the 250
>> volts. So I use two buck/boost xmfrs wired in a particular buck
>> configuration to lower the 3 phase voltage going to that one machine.
>> Since doing so the machine has not once alarmede out due to over
>> voltage.
>> I also wired up a little 120 to 12 volt xmfr in buck configuration
>> to lower the 125 volts from the outlet to the 110 volts needed for a
>> tube amp.
>> There are directions online on how to select the proper sized xmfr
>> for the load it will be seeing and how to wire the thing in buck
>> configuration.
>> Eric
>>
>
>Eric could you please give me directions to on-line info? I'm looking at dropping the voltage to a
>transformer so that I get lower secondaries out of it inexpensively. Single phase. My Google Fu
>isn't very strong on this one. I remember Big Clive doing similar in one of his videos a while back
>but have been unable to find that again.
>
>Cheers,