'Handytran' Portable Tool Transformer - CMH1200/110

BailMeOut

Where can I pick one of these up in Cork? Nothing on the Carroll and Meynell site about who sells these and need the smallest site transformer I can find.



http://carroll-meynell.com/products/site-safety-supplies/portable-tool-transformers/compact-portable-tool-transformer-cmh1200-110.html

Thanks

BailMeOut

sorry never mind. Found a place that ships for free. It's on the way to me in next 2 days.

Risteard81

Out of interest why did you need that one? I prefer a 3.3kVA transformer.

BailMeOut

it is for powering some USA stuff in my house!

Risteard81

OK, but you realise that as well as the supply being 50Hz as opposed to the 60Hz in the USA, this is a centre-tap earthed transformer for a reduced low voltage system. Therefore there is no neutral distributed but rather two phase conductors, each with 55V to Earth and 110V between phases.

BailMeOut

Risteard81 wrote: »

OK, but you realise that as well as the supply being 50Hz as opposed to the 60Hz in the USA, this is a centre-tap earthed transformer for a reduced low voltage system. Therefore there is no neutral distributed but rather two phase conductors, each with 55V to Earth and 110V between phases.

Thank you Risteard81. Yes - the 50/60Hz is no concern. It's all old computer equipment and ultimately DC but have with no voltage selectors so must be 110v. Nothing more than 200watts. Was going to put a commando plug on the end of a USA power strip wiring the green to the middle earth pin and then the black and white cables to the two 55V connectors.

Do you think this will work?

Bruthal

It should work fine assuming the frequency is not a problem.

Bruthal

Risteard81 wrote: »

OK, but you realise that as well as the supply being 50Hz as opposed to the 60Hz in the USA, this is a centre-tap earthed transformer for a reduced low voltage system. Therefore there is no neutral distributed but rather two phase conductors, each with 55V to Earth and 110V between phases.

Whether one conductor is a neutral or not, or center tapped, or an isolated output, makes no difference to the device being plugged in. Or does it?

2011

Bruthal wrote: »

Whether one conductor is a neutral or not, or center tapped, or an isolated output, makes no difference to the device being plugged in.

Agreed, when everything is functioning correctly.

The difference is under fault conditions and only on the secondary side of the transformer.

Bruthal

2011 wrote: »

Agreed, when everything is functioning correctly.

The difference is under fault conditions and only on the secondary side of the transformer.

Technical differences. End results are similar.

2011

Bruthal wrote: »

Technical differences. End results are similar.

Yeah, your Hilti drill will see a potential difference of 110VAC between 2 wires so it will work regardless of anything else.

BailMeOut

thanks everyone. It arrived yesterday. I picked up a commando plug for it today, wired to a USA power strip and it works great. Was worried it would 'hum' but there is no noise from it.