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Author Topic: 240v CTL 22e used with a 110v transformer  (Read 6970 times)

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240v CTL 22e used with a 110v transformer
« on: February 07, 2012, 07:04 PM »

I have just managed to get myself a lightly used CTL 22e dust extractor in 240v for a great price.  All my tools are 110v from when I used to work on sites, if I plug the 3kva transformer into the CTL 22 it draws enough power to kick in the auto function (with no tools running).   I have been told that it is possible to use a lower rated transformer so the auto function wont kick in till the tool is activated.

Anyone know what the highest rated KVA transformer I can use without activating the auto function?

I have a large dewalt mitre saw that is 1700w, if I could get a 1.8kva to work it would be ideal but fear that still might be too high.

I usually run a TS55(1200w) and a bosch sander(750w) so a 1.2kva minimum is required, it would be handy to be able to run the big mitre saw also!

Any advice much appreciated!


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Offline SRSemenza

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  • Finger Lakes Region, NY State , USA
Re: 240v CTL 22e used with a 110v transformer
« Reply #1 on: February 08, 2012, 09:08 PM »
Hi Kenny,

Welcome to the FOG!  [smile]

Not something I can help with , but I bet someone on here can.


Offline Festoolfootstool

  • Posts: 2076
  • The trouble with Bob is its all about Bob
Re: 240v CTL 22e used with a 110v transformer
« Reply #2 on: February 09, 2012, 03:01 AM »
Hi Kenny

welcome to the fog

I would think that the minimun kva required would be at least 2.2kw for your saw,but I dont have an ology, I do, do what you want to do but on a smaller scale

I sometimes run a 110v ets sander off a 300w transformer pluged into the 230v mini vac

I think you have to try it... another sollution would be some sort of remote switch for the vac

I will pop a 3.3kva trany on my mini and post the result when I go to the w,shop
If the milk turns out to be sour, I ain't the kind of **** to drink it.......

Why do Festool accessories only have a two month guarantee here in the UK ?

Offline neothermic

  • Posts: 3
Re: 240v CTL 22e used with a 110v transformer
« Reply #3 on: August 27, 2015, 01:13 PM »
Bit of thread necrophilia here, but I'm also interested in the answer to this - anybody know? I ran into this the other day and wondered at what point exactly the auto function kicks in, and what the maximum rated transformer is that can be used in this way.

Offline Holmz

  • Posts: 4010
Re: 240v CTL 22e used with a 110v transformer
« Reply #4 on: August 27, 2015, 06:35 PM »
I have never found a transformer small enough.
I suppose I could measure whether there is 220v on the outlet, or if it is measuring resistance.

You will need to use the manual switch or sell it, or use it with 220v tools.
I pretty much have the same deal, with a couple of 110v tools so I go manual. and some 223v which I use the auto setting.

Offline Rosco

  • Posts: 17
Re: 240v CTL 22e used with a 110v transformer
« Reply #5 on: December 18, 2015, 03:38 PM »
I was interested to find an outcome for this topic. I have a 110V kapex and a 240v midi extractor.

No doubt the solution will end up being switching the midi to manual, or selling it to be replaced with 240v version

Cheers in advance