Looking For An Rcd

[Sidewinder]

Another one from me tonight.

I'm looking for a 30A (rated, or above) 30mA RCD.

Must be 3 pole, or able to be used on a balanced 3ph supply, with no N.

Test button must function.

Must have the ability for a remote trip button to be connected.

Must be insensitive to harmonics, switched mode supplies, inrush etc. from servo drives & inverters like the Schneider Si type.

Must be able to work on a 3ph 220V supply.

Looking to replace an obsolete Fuji Electric device.

Open to ideas.

Thanks.

 

[NozSpark]

Jeez, your not asking for much are you ; )

 

[steptoe]

Another one from me tonight.

I'm looking for a 30A (rated, or above) 30mA RCD.  yes

Must be 3 pole, or able to be used on a balanced 3ph supply, with no N.  yes

Test button must function.  yes

Must have the ability for a remote trip button to be connected.  possibly

Must be insensitive to harmonics, switched mode supplies, inrush etc. from servo drives & inverters like the Schneider Si type.  how would I know

Must be able to work on a 3ph 220V supply.  how would I know

Looking to replace an obsolete Fuji Electric device.

Open to ideas.

Thanks.

got a big bagful of mixed RCDs etc, but on the last three points how would I know if its suitable for you or not,

and how can I work out if it would even fit where you want to put it.

 

[Sidewinder]

It's in a machine control panel, so not a DB, so it would probably fit, or be made to fit!

I am mod the panel if necessary.

The last three questions will be answered by the device spec.

If it's Schneider or their predecessors, forget it they won't work!

 

[steptoe]

I'll have a look tomorrow,

got a lot of mixed carp in there too TBH,

but, that may just the sort of carp that you need,

would there be any sort of clue on the data on the side? or anything I should be looking for in particular that may stand out as maybe being suitable.

 

[Sidewinder]

It's around a late 80's early 90's machine.
Not CE marked.

The OEM devices is a Fuji Electric unit.

 

[steptoe]

I'll have a look, and if I spy any likely candidates I'll speak to you,

although, TBH, most are probably 380/415v I would imagine.

 

[OnOff]

Big fan of the Merlin Si jobbies. To make the test button work without a neutral on the 30mA Si you fit a 2700 ohm wirewound resistor from memory. I have the "controlled copy" data sheet from Schneider somewhere ref what resistor according to mA rating etc. As for the other bits try Doepke as I know they do a remote trip one:

http://www.doepke.co.uk/rcd/rcdSV.html

 

[Sidewinder]

Onoff

Thanks for that, the Dopeke remote actuator won't work at first glance, as the device is the machine main switch also.

The Si will not operate at 220V 3ph, spent nearly an hour on to Schnieder Tech, direct, yesterday 0870 on my mobile! OUCH!!!

Though, I will contact them tomorrow to see what they can offer.

 

[OnOff]

Onoff

Thanks for that, the Dopeke remote actuator won't work at first glance, as the device is the machine main switch also.

The Si will not operate at 220V 3ph, spent nearly an hour on to Schnieder Tech, direct, yesterday 0870 on my mobile! OUCH!!!

Though, I will contact them tomorrow to see what they can offer.hina

Chaz Andrews is the Technical Manager at Doepke. Telephone is 01628 829 133. And with Doepke it's NOT made in China!

Nothing here:

http://www.doepke.co.uk/rcd/images/DFA2-Brochure09-2011.pdf

?

 

[OnOff]

I have an "uncontrolled" document from Merlin Gerin reference their Multi 9 units. Apologies, it's a 4W, 2400ohm resistor needed NOT 2.7kohm as my earlier post.

On the same sheet, clear as day it shows a diagram for a 3P 220V / (240V) unit. 2 pictures. To make it trip to tests sans a neutral it shows a link between N & 3 or N & 4 depending on what way your feeding it.  The next diagram is for 3P 380V (415V) and that's when you fit the resistor rather than the link.

Then, looking at the Merlin document "LV earth leajkage protection Multi 9 "si" type", p13 here:

http://download.schneider-electric.com/files?L=en&p=&p_docId=&p_docId=&p_Reference=M9DP38CEN&p_EnDocType=Brochure&p_File_Id=3627890&p_File_Name=M9DP38CEN.pdf

On there is a 3P........220V - 415V, NG125 unit. Does that not suggest its good a 220V? It is "si" type. Could you not then use a separate contactor to bring in a resistor?

 

[Sidewinder]

Onoff,

I spoke direct to Schneider Technical about the Si type, they are not suitable for 220V 3ph.

The RMG units are not suitable for "active loads".

Canoe,

PG in Swansea could not find anything suitable.

The machine is now running, but we need to re-implement the remote control for various reasons ASAP, but this will be the New Year now, so I have a few days to try to find out info.

 

[NozSpark]

Surely a switched 7K5 ohms resistor between any outgoing phase and incoming neutral terminal would do that?

 

[steptoe]

had a look today, have some 3pole RCDs, but nothing 220v or with remote capability,

looks like you are sorted anyway.