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Old 06-13-2012, 05:43 PM   #1
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RCD - Autoresetting


I am trying to locate a RCD auto resetting device. They are available overseas however I can't find any electricians that are aware of such devices.

They work by automatically retested an "off" RCD and if OK, will move the RCD to "on".

Any advice is appreciated.

Dean

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Old 06-13-2012, 05:47 PM   #2
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RCD - Autoresetting


Where is your location? RCD is a European term.

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Old 06-13-2012, 06:04 PM   #3
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RCD - Autoresetting


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Originally Posted by JDJW View Post
They work by automatically retested an "off" RCD and if OK, will move the RCD to "on".
Possibly U.S. rules forbid residential current coming back on by itself.
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Old 06-13-2012, 06:13 PM   #4
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RCD - Autoresetting


The closest thing in the US is self testing GFCIs.

http://www.hubbell-wiring.com/press/pdfs/H5185.pdf

http://www.amazon.com/Leviton-S7599-.../dp/B005DTE0SQ
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Old 06-13-2012, 06:25 PM   #5
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RCD - Autoresetting


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Originally Posted by Code05 View Post
So the device in the first link counts 3600 cycles of the 60 Hz and then tests. Probably gives a marginal increase in reliability vs. checking once/month.
Not a bad idea.

Electronics-wise this should probably add $1 or less to the cost of each GFCI, assuming the manufacturer is buying in huge lots. They have to add a 12 (16 for the second link) stage binary counter IC to the PC board.

Last edited by Yoyizit; 06-13-2012 at 06:28 PM.
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Old 06-13-2012, 07:40 PM   #6
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RCD - Autoresetting


Thanks for the replies.

I am located in Australia - RCD are compulsory over here. In my situation, the RCD gets triggerred occassionaly and when I visit the holiday home where its installed - the fish in the aquarium are dead and the frig is full of mould etc
The devices seem to be popular and widely used in Europe and UK from what I can gather.
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Old 06-13-2012, 09:01 PM   #7
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RCD - Autoresetting


You seem to want a device that decides if it tripped for a valid or invalid reason.
For houses this decision is usually made by a human with test equipment, although I think power companies have automatic reclosing circuit breakers that try several times to energize a circuit that initially caused an overload, in the hope that the fault has since cleared.

If no one makes such a device, you could make it yourself by modifying a GFCI but the details of that project are somewhat beyond the scope of this forum.
You could try electro-tech online but I'm not sure making such a device would be wise for an unoccupied house.
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Old 06-13-2012, 09:19 PM   #8
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RCD - Autoresetting


In fact when the device tripped correctly, but the cause is weather related and qucikly clears.

Our solar panels are tempermental and when rain/water contact some where, it trips. It is impossible howver to identify the panel (there are 24) and relevant cell in the panel.
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Old 06-13-2012, 09:32 PM   #9
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RCD - Autoresetting


Quote:
Originally Posted by JDJW View Post
qucikly clears.
So you need a GFCI that waits this interval of seconds, minutes or hours and then retries for a few times.
A GFCI, relay & timer will do it. If you can post the schematic of a candidate GFCI I may be able to step you through it.

This
http://www.ti.com/lit/ds/symlink/lm1851.pdf
is just one choice for the IC in the thing. There is some additional circuitry.
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Old 06-13-2012, 11:41 PM   #10
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RCD - Autoresetting


Quote:
Originally Posted by JDJW View Post
Thanks for the replies.

I am located in Australia - RCD are compulsory over here. In my situation, the RCD gets triggerred occassionaly and when I visit the holiday home where its installed - the fish in the aquarium are dead and the frig is full of mould etc
The devices seem to be popular and widely used in Europe and UK from what I can gather.
Which verison you want ?

There is a breaker and power point verison.

However the powerpoint verison is not super common but we can get it from time to time.

And what brand Customer panel or breaker panel you have there so I can able look it up.

Merci,
Marc
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Old 06-13-2012, 11:47 PM   #11
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RCD - Autoresetting


The version is for a circuit board that is breaker...
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Old 06-13-2012, 11:54 PM   #12
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RCD - Autoresetting


Ok but what brand name so I can able dail it down closer.

Just keep in your mind the European standard may be little differnt than Aussie standard but it should be pretty close with the specs.

Once you give me the brand name of that breaker box is then I can able post what model you can use.

Merci,
Marc
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Old 06-14-2012, 01:23 AM   #13
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RCD - Autoresetting


The brand on the web is GEWISS

http://www.gewiss.com/irj/portal

They have a large range of RCD Autorestters and I don't have the technical background to make an informed selection from their range and whether it is going to be compatible.

We have 3 phase with everything being standard for Australian conditions
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Old 06-14-2012, 10:41 AM   #14
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RCD - Autoresetting


Quote:
Originally Posted by Yoyizit View Post
So you need a GFCI that waits this interval of seconds, minutes or hours and then retries for a few times.
A GFCI, relay & timer will do it. If you can post the schematic of a candidate GFCI I may be able to step you through it.

This
http://www.ti.com/lit/ds/symlink/lm1851.pdf
is just one choice for the IC in the thing. There is some additional circuitry.
Quoting a data sheet for an IC!?!?!? You probably can't even buy the part in less that 100k piece lots. Hardly a helpful suggestion. Also what about UL and related safety approvals. That is probably a $50-75k fee for submittal.
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Old 06-14-2012, 12:58 PM   #15
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RCD - Autoresetting


Quote:
Originally Posted by curiousB View Post
Hardly a helpful suggestion.
Petition one or more of the moderators to have me permanently banned. I promise I won't come back with a new username/e-mail address.

In the meantime help the OP. . .but. . .Primum non nocere.

If you've taken the Myers Briggs I'm betting the last letter in the sequence is a J.
Not that there is anything wrong with that!

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