Fuse Upgrade for Garage: Connecting 230V Welding Machine with 40-180A Current & 7.4KW Power

Hello and welcome,

I am not a specialist in electricity (I would lay the installations according to the scheme, but I do not have much experience in this), which is why your opinion is very important to me.

My problem:

There is a 10A fuse in the garage, a cable to the socket comes directly from it (so far there is only 1 in the garage) and a cable for lighting (2 fluorescent lamps). Today I bought a welder and when I connect it to the mains and increase the "amperage" for welding, the fuse blows.

welding machine parameters are:

§ mains voltage - 230
§ welding current - 40-180A
§ electrode - 1.6-4mm
§ voltage without load - 48 V
§ max power consumption - 7.4 KW
§ fuse: 16a
§ regulation of the welding current
§ protection class: IP21
§ insulation class h
§ cooling: fan

What should I do to avoid this fuse blowing?
change the fuse? how so what? Or how to improve the installation?

Regards.

Is the welder for 1 phase? This would require a 32A fuse or three phase power supply and 16A fuses.

Moderated By Akrzy74:

The advice is rather not well thought out. Please do not give such advice - it is dangerous!

It's 230V so I'm guessing it's single phase.

Could I add a second fuse, as you write, 32A under the sockets themselves, and leave the lighting at 10A? how to do it? There are 3 wires - neutral, current and grounding - to the garage.

After all, in the parameters of the welder you have:

Quote:

fuse: 16A

So the fuse should not be less than 16A. You can increase the protection under certain conditions (suitable power cord, correspondingly higher prior protection, SWZ measurement).

fur he wrote:

Quote:

Is the welder for 1 phase? That would require a 32A fuse

What is the reason for this, and how does it relate to the nameplate of the device? Not to mention the threat...

Ps. No 32A protection! This is overkill - without knowing the parameters of the installation!

hmm.. it follows that someone must install a second fuse (overcurrent circuit breaker) larger than 16 A for me?

This will mean that when welding under the highest load of 180A, I will not blow the fuse?

edit:
when I put a stronger fuse (e.g. 16A) will it work? I'm asking because I just remembered that the fuse on the distribution board in the garage complex is also 10A? will it matter?

From this it follows that the power cable of the socket to which the welder will be connected must be >= 2.5mm? Cu, and protection >= 16A, preferably C16-C20. However, there is little information to give any specific advice. For me, the basis for discussion is the value of the pre-counter protection, the type of cable powering the socket to the welding machine, and the SWZ measurement. Especially when safety features with C characteristics are involved, which are recommended for welding machines. In your case, it may turn out that you will have protection B16.
An on-site electrician will assess...

Ps. Now I have read:

Quote:

when I put a stronger fuse (e.g. 16A) will it work? I'm asking because I just remembered that the fuse on the distribution board in the garage complex is also 10A? will it matter?

This is of great importance. This means that when you mount a larger fuse (e.g. 16A) it will turn off the 10A - for the whole! Remember that the fuse is not everything - very important, if not the most important is the cross-section of the power cord, which is de-facto matched to the protection. And actually vice versa. I suspect that you will not be able to do anything, because it is often in garage complexes that such protection is installed in order to reduce the power consumption of garage owners.
Looks like an ill-advised purchase to me.

Maybe a small correction.. there every garage has its own fuse. I don't know about the others, but mine is 10A and that one also (possibly) should be replaced?

A conversation with the manager (and the manager probably has an electrician) of these garages should clear up a lot. Ask him if it is possible to exchange the collateral for a larger one.

A 10A fuse in the garage for the socket and lighting is definitely not enough.
It should be 16A. If it is screwed in fusible (wts), replace it with 16A and that's it. If S191 it will be a bit more "fun".

And a slow fuse is recommended for the welder, a 16A fast one can also blow out, despite the fact that the welder's rating plate says 16A.

As I know such garages, 16A is before the meter and 10A after the meter and a 1.5mm? cable.

lubamet wrote:

And a slow fuse is recommended for the welder, a 16A fast one can also blow out, despite the fact that the welder's rating plate says 16A.

I see that my colleague does not accept a different opinion on the topic of zab. delayed.
I don't know what my friend uses for a welder.

Personally, I deal with inspections of welding machines, including transformer ones, and it has never happened that a B16A worked.

Also, even though my friend deleted my post, I think it's okay. delay is not necessary.

It's not me, it's someone in power apparently this someone thought I was right, I didn't have my fingers in it.

You service welding machines with soft start.
Believe me that these made in media markt without soft start can burn B16 and also work normally on it....
Soft start is an additional cash register, and the welder must fit into the price of PLN 299 with VAT .
Whether it's a welder or another large transformer without software, it will burn the protection, and the toroids in particular.
3 phase ones are a bit better in this regard, but we are talking about 1 phase anything....

Quote:

I personally do the reviews

So definitely not those from media markt, because they are all taken to the trash and not reviewed ...., there is nothing to review there because nothing remains from the transformer and there is no famous soft start, so there are not even parts for transplants....

Best regards, Dear Colleague, I don't want to offend you, but have you read something wrong about power consumption? 7kw from one phase? -There must be at least two.

Think about whether you really need to weld with the highest current you can set in this welder? Do you have to use 3.25 and 4mm electrodes? Using 2.5mm electrodes (current 60-100A) you can also do a lot of welding work...
Once (although I used an inverter) on the B6 protection I could successfully weld with 2.5mm electrodes at a current of 60-70A.