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-   -   RCD - Autoresetting (http://www.diychatroom.com/f18/rcd-autoresetting-146954/)

JDJW 06-13-2012 05:43 PM

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

Code05 06-13-2012 05:47 PM

Where is your location? RCD is a European term.

Yoyizit 06-13-2012 06:04 PM

Quote:

Originally Posted by JDJW (Post 942717)
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.

Code05 06-13-2012 06:13 PM

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

Yoyizit 06-13-2012 06:25 PM

Quote:

Originally Posted by Code05 (Post 942742)

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.

JDJW 06-13-2012 07:40 PM

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.

Yoyizit 06-13-2012 09:01 PM

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.

JDJW 06-13-2012 09:19 PM

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.

Yoyizit 06-13-2012 09:32 PM

Quote:

Originally Posted by JDJW (Post 942912)
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.

frenchelectrican 06-13-2012 11:41 PM

Quote:

Originally Posted by JDJW (Post 942800)
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

JDJW 06-13-2012 11:47 PM

The version is for a circuit board that is breaker...

frenchelectrican 06-13-2012 11:54 PM

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

JDJW 06-14-2012 01:23 AM

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

curiousB 06-14-2012 10:41 AM

Quote:

Originally Posted by Yoyizit (Post 942924)
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.

Yoyizit 06-14-2012 12:58 PM

Quote:

Originally Posted by curiousB (Post 943266)
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. :thumbsup:

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. :laughing:
Not that there is anything wrong with that! :whistling2:


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