Active RCD

[NozSpark]

Following on from a previous thread of mine, I am having trouble finding a supplier of din rail mounted ACTIVE (non latching) 30mA RCDs. I'm not too bothered about the rating so long as its over 20A.

Everywhere I've looked only have RCD sockets as active.

Any help would be appreciated.... I have to have costings tonight for my quote which will go before the clients committee tomorrow.

 

[johninlondon1]

RCD, CIRCUIT BREAKER, COMBINATION, 1 POLE, 10KA, 20A, DIN MOUNT, 30MA | Residual current devices | Rexel Electrical Supplies

A32HE Eaton MEM | Memera 2P 30mA RCD,32A DIN rail | 183-9887 | Welcome to RS Israel Online

 

[NozSpark]

Forgot to say.... they need to be active ones.

OP now edited

 

[SLIPSHOD & SLAPDASH]

A wholesaler gave me active ones for a job recently. Didnt notice untill i had fitted them as they were not really the best choice for my needs. I am sure they were Powerbreaker

Edit. If i had read the post properly i would have seen you wanted RCD's not sockets Dohh

 

[NozSpark]

And there was me thinking all nice thoughts, that all my problems were sorted

But no,,, you've let me down again

I tell you what though I had a right ding dong today,,, wholesaler told me yesterday that he'd been promised that all CPN RCDs were active,,, I get on the phone today and was told the same! but when pressed they said that they were the same as what they fit in their CUs,,, well then they are not active I say,,, oh yes they are,,, they're not I say again,,, I'll put you through to technical,,, ,well the guy wasn't available so he rang me back and admitted that all their RCDs are passive.. Dashed again

 

[Evans Electric]

You can't get the staff these days.

 

[johninlondon1]

Sorry about my ignorance, what is the difference between active and passive Rcd's. I'm just a student trying to learn so forgive my ignorance/lack of knowledge.

 

[batty]

Not sure i always call them latching and none latching if thats the same thing.

 

[NozSpark]

Most (if not all) RCDs tat you will come across are passive ones (or latching),,, ie. they will not trip in the event of a supply failure

Active RCDs (or non-latching) will trip in the event of a supply failure, these are usefull for supplies to moving machinery where you wouldn't want it starting up when the power comes back on.

 

[johninlondon1]

Thanks. Every day I learn something new, shame I forget what I learnt yesterday.

 

[apprentice87]

Hi all,

Newbie type observation here....Would that not be EXTREMELY dangerous???? All machinery with moving parts is supposed to be fitted with a proper "No-Volt" release motor starter, indeed, it is part of the regs... So why then, would you need one of these "funny" RCD's??

Does it not mean that in the event of a short duration "power cut" a machine will stop, the operator is liable to be tinkering around trying to find the none existant fault, when all of a sudden, some one resets the "funny" rcd in a board that may be in a different part of the building entirely, and poor machinery operator get killed or injured.

Just trying to learn here!!!!

john..

 

[NozSpark]

You're quite right,,, and mayde thats why I can't find a din rail mounted one,, only active socket rcds.

Many DIY tools, lathes and bench grinders, don't have no volt release so these sockets would be ideal.

 

[apprentice87]

Hi Nozspark,

You are right there!! If you look in the catalogue of a very well known "diy" type tool supplier, you will find loads of "motor starters" all with overload protection for the motor [so far so good] but none of them have the required "No-Volt" release. [Not so good!!]

You are also right when you say about lots of these lathes and other stuff not properly equipped. I wonder how they get this stuff "CE" marked so they can sell it.... Surely this sort of thing would be covered in the "CE" regs..

I was thinking that perhaps the people that dreamt up the CE regs with all sorts of funny and complicated rules about "Electromagnetic Compatibility" and the like, have never actually screwed a nut onto a bolt, and therefore, would not know a lathe if they saw one..... but perhaps that is me being all, cannot think of the term, but you know what i mean!!!

john...