Wow I thought I was the only energy monitor nerd around. Apparently there is a
lot of interest in this area. I plan to use one wire for temp A/C control with
a Rpie and have already built that circuit but have been also working on
monitoring the AC meater. for you EU folks there is a site which has
information on the subject and supplies, software for the Audrino and now I see
articles for the Rpie I ordered a couple of CT clamps from their links here is
one of their monitoring schemes
This can be achieved with the following circuit which consists of two main
parts:
1. The CT sensor and burden resistor
2. The biasing voltage divider (Rvd)
the link is http://openenergymonitor.org/emon/.
I use the Commoncost to monitor my meter in the US and have dealt with
http://www.simpleenergyworks.com
They sell all the US based power monitor stuff and will sell the commoncost CT
at $ 20 each, free shipping in US. These are pretty good folks who are not
afraid of getting on email to help you with any problems.
For the EU I think you can get a commoncost CT on the EU version of amazon.com
Using the commoncost unit showed me the time my AC unit was on and off one wire
gave me the temps spreads and pointed to a bad thermostat temp spread. This
paid for the cost of the unit as the local repair folks could not find anything
wrong except hi electric cost.
The common cost unit dose not take induction power factor which all purist want
but it is real close. From a pure engineering point of view the open energy
folks do it right but you have to mod it for US 240 volts stuff. The Env R unit
for the US runs about $ 129.00 and the network bridge which send your stuff to
a web site is $ 65 so about $ 200.00
one year unit is free on the internet about $ 36.00 a year for up to 10
monitors. Worth a look.
I sure hope we get others to follow up on this area as we all can learn
something in both the power monitor and temperature areas.
Jim
On Sunday, February 9, 2014 1:28 PM,
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<[email protected]> wrote:
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Today's Topics:
1. Re: AC amps sensor (Colin Reese)
2. Re: AC amps sensor (Marc dirix)
----------------------------------------------------------------------
Message: 1
Date: Sun, 9 Feb 2014 09:40:05 -0800
From: Colin Reese <[email protected]>
Subject: Re: [Owfs-developers] AC amps sensor
To: "OWFS (One-wire file system) discussion and help"
<[email protected]>
Cc: "OWFS (One-wire file system) discussion and help"
<[email protected]>
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
I see - you're buying AC/AC CTs. I just buy DC current or voltage output.
Needn't mess with it.
> On Feb 9, 2014, at 9:14, Marc dirix <[email protected]> wrote:
>
> I use the opamp to integrate the half sine output of the clamp.
>
>
>
>
>> On Sun, Feb 9, 2014 at 6:05 PM, Colin Reese <[email protected]> wrote:
>> What do you need an op amp for? I use these things all over the place and
>> plug them straight into adcs, as long as the internal resistance is
>> sufficient
>>
>>
>>
>>> On Feb 9, 2014, at 6:59, Marc dirix <[email protected]> wrote:
>>>
>>> Hi Chris,
>>>
>>> I think every reseller should be able to sell you one, because for their
>>> system you need to buy loose clamps if your connection is 3-fase.
>>> I've bought mine from bespaarbazaar.nl (obviously in the Netherlands).
>>>
>>> Amazon seemed to have sold them:
>>> http://www.amazon.co.uk/Current-Cost-Sensor-Clamp-CT/dp/B002FVNQHQ
>>>
>>> Best regards,
>>>
>>> Marc
>>>
>>>
>>>> On Sun, Feb 9, 2014 at 2:29 PM, Chris Green <[email protected]> wrote:
>>>> On Sat, Feb 08, 2014 at 07:59:43PM +0100, Marc dirix wrote:
>>>> > Hi,
>>>> > I've made an 1-wire interface for the current cost clamps. The current
>>>> > cost clamp is specified 100A with 50mA accuracy. You can buy spare
>>>> >current
>>>> > cost clamps for about 15 euro. The interface is a simple
>>>> >opamp+DS2450. On
>>>> > request I'll send you the eagle schematic.
>>>>
>>>> So what exactly is a "current cost clamp" and where can I buy one?
>>>>
>>>> ... ah, I sort of see, it's something for seeing how much your
>>>> electricity is costing you.
>>>>
>>>> However I can't see anywhere that sells just the clamps, can you point
>>>> me at a supplier please.
>>>>
>>>>
>>>> --
>>>> Chris Green
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Managing the Performance of Cloud-Based Applications
>>>> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
>>>> Read the Whitepaper.
>>>> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
>>>> _______________________________________________
>>>> Owfs-developers mailing list
>>>> [email protected]
>>>> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>>>
>>>
>>>
>>> --
>>> Marc Dirix Computers
>>> Schmeddingstraat 24
>>> 6361AZ Nuth
>>> ------------------------------------------------------------------------------
>>> Managing the Performance of Cloud-Based Applications
>>> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
>>> Read the Whitepaper.
>>> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
>>> _______________________________________________
>>> Owfs-developers mailing list
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>>
>> ------------------------------------------------------------------------------
>> Managing the Performance of Cloud-Based Applications
>> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
>> Read the Whitepaper.
>> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
>> _______________________________________________
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>> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>
>
>
> --
> Marc Dirix Computers
> Schmeddingstraat 24
> 6361AZ Nuth
> ------------------------------------------------------------------------------
> Managing the Performance of Cloud-Based Applications
> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
> Read the Whitepaper.
> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
> _______________________________________________
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> https://lists.sourceforge.net/lists/listinfo/owfs-developers
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Message: 2
Date: Sun, 9 Feb 2014 19:28:05 +0100
From: Marc dirix <[email protected]>
Subject: Re: [Owfs-developers] AC amps sensor
To: "OWFS (One-wire file system) discussion and help"
<[email protected]>
Message-ID:
<CAERi-x0k=TbXPdH=8tkzrpgksmylhgz37blb05dm6ec_w5g...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
yes would make sense, but then again these clamps are much cheaper then any
other I've found.
On Sun, Feb 9, 2014 at 6:40 PM, Colin Reese <[email protected]> wrote:
> I see - you're buying AC/AC CTs. I just buy DC current or voltage output.
> Needn't mess with it.
>
>
>
> On Feb 9, 2014, at 9:14, Marc dirix <[email protected]> wrote:
>
> I use the opamp to integrate the half sine output of the clamp.
>
>
>
>
> On Sun, Feb 9, 2014 at 6:05 PM, Colin Reese <[email protected]> wrote:
>
>> What do you need an op amp for? I use these things all over the place and
>> plug them straight into adcs, as long as the internal resistance is
>> sufficient
>>
>>
>>
>> On Feb 9, 2014, at 6:59, Marc dirix <[email protected]> wrote:
>>
>> Hi Chris,
>>
>> I think every reseller should be able to sell you one, because for their
>> system you need to buy loose clamps if your connection is 3-fase.
>> I've bought mine from bespaarbazaar.nl (obviously in the Netherlands).
>>
>> Amazon seemed to have sold them:
>> http://www.amazon.co.uk/Current-Cost-Sensor-Clamp-CT/dp/B002FVNQHQ
>>
>> Best regards,
>>
>> Marc
>>
>>
>> On Sun, Feb 9, 2014 at 2:29 PM, Chris Green <[email protected]> wrote:
>>
>>> On Sat, Feb 08, 2014 at 07:59:43PM +0100, Marc dirix wrote:
>>> > Hi,
>>> > I've made an 1-wire interface for the current cost clamps. The
>>> current
>>> > cost clamp is specified 100A with 50mA accuracy. You can buy spare
>>> current
>>> > cost clamps for about 15 euro. The interface is a simple
>>> opamp+DS2450. On
>>> > request I'll send you the eagle schematic.
>>>
>>> So what exactly is a "current cost clamp" and where can I buy one?
>>>
>>> ... ah, I sort of see, it's something for seeing how much your
>>> electricity is costing you.
>>>
>>> However I can't see anywhere that sells just the clamps, can you point
>>> me at a supplier please.
>>>
>>>
>>> --
>>> Chris Green
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Managing the Performance of Cloud-Based Applications
>>> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
>>> Read the Whitepaper.
>>>
>>> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
>>> _______________________________________________
>>> Owfs-developers mailing list
>>> [email protected]
>>> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>>>
>>
>>
>>
>> --
>> Marc Dirix Computers
>> Schmeddingstraat 24
>> 6361AZ Nuth
>>
>>
>> ------------------------------------------------------------------------------
>> Managing the Performance of Cloud-Based Applications
>> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
>> Read the Whitepaper.
>>
>> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
>>
>> _______________________________________________
>> Owfs-developers mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Managing the Performance of Cloud-Based Applications
>> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
>> Read the Whitepaper.
>>
>> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
>> _______________________________________________
>> Owfs-developers mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>>
>>
>
>
> --
> Marc Dirix Computers
> Schmeddingstraat 24
> 6361AZ Nuth
>
>
> ------------------------------------------------------------------------------
> Managing the Performance of Cloud-Based Applications
> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
> Read the Whitepaper.
>
> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
>
> _______________________________________________
> Owfs-developers mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>
>
>
> ------------------------------------------------------------------------------
> Managing the Performance of Cloud-Based Applications
> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
> Read the Whitepaper.
>
> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
> _______________________________________________
> Owfs-developers mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>
>
--
Marc Dirix Computers
Schmeddingstraat 24
6361AZ Nuth
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Managing the Performance of Cloud-Based Applications
Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
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Managing the Performance of Cloud-Based Applications
Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
Read the Whitepaper.
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