What do we think the red button does?

happysteve · Feb 23, 2023

The device on the right is an RCBO. The orange button at the top is the usual test button. What do we think the small square red button does?

[ElectriciansForums.net] What do we think the red button does?

brianmoooore · Feb 23, 2023

There was a post on here a couple of months ago where someone had an 'extra' button on a RCD or RCBO.
Can't remember for sure, but IIRC, which I probably don't, it disabled the RCD.

westward10 · Feb 23, 2023

brianmoooore said:
There was a post on here a couple of months ago where someone had an 'extra' button on a RCD or RCBO.
Can't remember for sure, but IIRC, which I probably don't, it disabled the RCD.

Yes that wasn't so long ago they couldn't get it to trip because it was disabled.

Pretty Mouth · Feb 23, 2023

At a guess, I'd say a reset button?

happysteve · Feb 23, 2023

I removed the MCB bit from the RCD bit. Huh.

When I move the lever on the side, the button pops out

When the button is popped out, the MCB bit won't fit flush with the RCD bit

brianmoooore · Feb 23, 2023

So does it indicate whether it's a RCD trip or a MCB trip? Could do with incorporating into UK RCBOs if it does.

MJPD29 · Feb 23, 2023

Judging by the Chinese writing I'd say self destruct?

happysteve · Feb 23, 2023

brianmoooore said:
So does it indicate whether it's a RCD trip or a MCB trip? Could do with incorporating into UK RCBOs if it does.

Ooh interesting! Maybe that's it!

The lever on the MCB bit moves the internals... It's possible that an over-current moves the internals in a way that will pop out the button via the side lever (as well as tripping the front lever down).

happysteve · Feb 23, 2023

Thinking about it, it must be the other way round.

The RCD bit, when triggered by a fault, moves the little lever on the side of the RCD bit, which then pushes the internals of the MCB bit, which disconnects the line (L). I suspect at this point, the little red button pops out.

So you'll need to push the button back in, before you can reset the MCB.

Now the little diagram on the front makes sense, too!

But it does tell you whether it's the RCD that has tripped, or an over-current.

Huh!

So I guess it's a single pole device (like most single module "full height" RCBOs), just made in a modular way.

brianmoooore · Feb 23, 2023

Definitely only SP switching by the diagram.
Put it back together and stick the RCD tester on it. See if the button pops out.

happysteve · Feb 23, 2023

brianmoooore said:
Put it back together and stick the RCD tester on it. See if the button pops out.

Good idea! I'll do so at the weekend

snowhead · Feb 23, 2023

This is the Chinese text translated by image;

nicebutdim · Feb 23, 2023

snowhead said:
This is the Chinese text translated by image;

View attachment 106362

How is this possible?

brianmoooore · Feb 23, 2023

nicebutdim said:
How is this possible?

Modern magic.

snowhead · Feb 23, 2023

This is the text at the side of the test button,

Snip the text as close as you can, like below,

Then stick in this,

Yandex

Finds everything

translate.yandex.com

Eddy Currents · Feb 23, 2023

English equivalent?

nicebutdim · Feb 23, 2023

snowhead said:
This is the text at the side of the test button,

View attachment 106364

Snip the text as close as you can, like below,

View attachment 106366

Then stick in this,

Yandex

Finds everything

translate.yandex.com

This is literal magic - I never knew such technology existed!

What do we think the red button does?

happysteve

-

brianmoooore

-

westward10

Pretty Mouth

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happysteve

-

brianmoooore

-

MJPD29

-

happysteve

-

happysteve

-

brianmoooore

-

happysteve

-

snowhead

-

nicebutdim

brianmoooore

-

snowhead

-

Yandex

Eddy Currents

nicebutdim

Yandex

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