Transformers on standby

[nickk]

Does this transformer use more electricity than the regular 3.3 kv one,when it’s plugged in but no tools running? Thanks.

 

[dobbslc]

I'd hope so, that's juicy!
47.2 amps looks like the max input current it will use and 90.9 the max output, our 3 phase 10kva transformers idle at about 5-6 amps if that helps.
But yes it will use a fair bit more than a handheld 3.3kva yellow TX.
You'll need a D type MCB to get that fired up!

 

[Erie Fred]

what are you going to do with all that power ?

 

[nickk]

Thanks,I got it a few years ago as if one of us was using a 9” grinder and someone else maybe a mag drill ,the smaller one would trip.
I’ll use another work method.

 

[nickk]

what are you going to do with all that power ?

Let it go to my head!

 

[Erie Fred]

Let it go to my head!

seriously ?
What would someone in the UK need 90 amps of 120 vac for ?

 

[dobbslc]

Just get another handheld TX and weigh that big one in £££

 

[Agroshield]

Is there any way to use a cheap remote-controlled relay on the transformer input so it would be off when you do not need it, but remotely-power-uppable when you do?

 

[Dcal]

Is there any way to use a cheap remote-controlled relay on the transformer input so it would be off when you do not need it, but remotely-power-uppable when you do?

That's what I've done.
I have switched sockets that are supposed to turn the plug live when switched on (sockets are always live)
I rewired the sockets with a 12v supply to operate a relay when a socket is switched on.
Works well but all sockets are live when one is switched so probably not as safe, but works for me.
You need to have a plug inserted before you can turn the power on (or off) or in my case energinise the transformer.
I also have an illuminated switch at the door that powers the system so I don't forget to turn it off on the way out and the transformer isn't left live when I'm not using 110v.
Only minor issue is there is a fair arc every time I turn the power off, but it hasn't fried the relay yet.
I think I have it on a C type breaker but it only trips the very odd time when switched on, during the very coldest weather.

 

[brightspark]

seriously ?
What would someone in the UK need 90 amps of 120 vac for ?

a site transformer for multiple use

 

[Brad93]

That's what I've done.
I have switched sockets that are supposed to turn the plug live when switched on (sockets are always live)
I rewired the sockets with a 12v supply to operate a relay when a socket is switched on.
Works well but all sockets are live when one is switched so probably not as safe, but works for me.
You need to have a plug inserted before you can turn the power on (or off) or in my case energinise the transformer.
I also have an illuminated switch at the door that powers the system so I don't forget to turn it off on the way out and the transformer isn't left live when I'm not using 110v.
Only minor issue is there is a fair arc every time I turn the power off, but it hasn't fried the relay yet.
I think I have it on a C type breaker but it only trips the very odd time when switched on, during the very coldest weather.

Might want a snubber

 

[dobbslc]

seriously ?
What would someone in the UK need 90 amps of 120 vac for ?

It might have been for a spot welder.

 

[brightspark]

Just get another handheld TX and weigh that big one in £££

not worth doing there filled with a resin mix

 

[Erie Fred]

It might have been for a spot welder.

I've seen UK single phase spot welders they run on 240 vac.