Kapex and ct22

[Steve Hiscocks]

Hi, i have resently bit the bullet and perchased a kapex ( just dont tell the wife what it cost), my problem is, when running of the ct22 itseams to run a bit slow, blade speed that is. I looked at the specs of the ct to see if iwas over loading it. To my horror i found the rating for the plug on the ct is only 300 watt on the 110v GB model. Yet i have running my ts55 for years with no problems for that matter the of 1400 has never given me a problem.( I am using a 3kva transformer) does anyone have any ideas to whyits running slow or for that matter why the ct has such a low rating when the 240v Gb and the 110v US model has a rating of over 2000 watt.

 

[ajones]

Hi Steve

welcome to the fog

this topic has been covered several times so if you do a search you should find all the info you need,but the rating has more to do with local legislation
than the amount of load that can be safely pulled though the ct.

If you have a issue I think it more likely to be your transformer. if its a cheaper one with poor duty cycle you will be at the max with kapex and ct

you could try turning down the ct that may indicate the cause.

 

[ccarrolladams]

For quite some time after I bought my first Kapex the day they were sold in the USA, I ran it plugged into one of my CT22s. In my condo I do have a dedicated 20a, 120v, 1 ph outlet. There was never any electrical problem. I have always connected my Kapex to the CT with 36mm AS hose. Those are half of a 36mm x 5m AS hose. I cut the long hose in half and applied the correct fitting so each of the hoses could connect to a Kapex (or other tool) on one end and to the vac on the other end.

Unfortunately in those days I worked on sites and in rented shops most of the time. Hardly ever did I find a true dedicated 20a 120v circuit with the NEMA outlet. So I usually ran the CT22 on one circuit and the Kapex on another. My experience has always been that there is no benefit to stopping the vac once a cut is finished and no disadvantage to having suction going when starting a cut.

In my new shop we started hooking our several Kapex to dedicated CT22s with the 2.5m x 36mmAS hoses. Each had separate circuits for the Kapex and vac. Eventually we found a way to increase the velocity of the shop dust collection system in the area where we have two Kapex permanently located. Each has a remote damper so it can be opened at the start of a Kapex session and closed when the session is ended. By the way, those Kapex also have a typical miter saw dust shroud hooked with a 100mm hose to the plant dust collection. Those shrouds catch the small amount of dust not extracted by the Kapex.

It seems to me a 3KVA transformer should well serve a UK 110v CT22 and Kapex combination. Are you sure that transformer is actually delivering 3KVA of 110v? Or is it drawing 3KVA from the 240v mains? Even with a very good transformer there will be some loss stepping down.

 

[FulThrotl]

Hi, i have resently bit the bullet and perchased a kapex ( just dont tell the wife what it cost), my problem is, when running of the ct22 itseams to run a bit slow, blade speed that is. I looked at the specs of the ct to see if iwas over loading it. To my horror i found the rating for the plug on the ct is only 300 watt on the 110v GB model. Yet i have running my ts55 for years with no problems for that matter the of 1400 has never given me a problem.( I am using a 3kva transformer) does anyone have any ideas to whyits running slow or for that matter why the ct has such a low rating when the 240v Gb and the 110v US model has a rating of over 2000 watt.

a 3kw dry type transformer is more than enough to run that combo.

when you overload a transformer, the core won't carry enough flux to maintain the output...
here's how to tell what gives.... stick a digital voltmeter in the plug next to the one the vac
is using, best if you have one with a min/max capture, and cut a 4x4 or something significant,
and see what the voltage dips to.

i'd be willing to bet a cheeseburger that voltage on the secondary side of the xfmr won't dip.
it'll dip when you start the saw, 'cause of the inrush current, but when cutting, i bet it doesn't
drop more than three volts.

rule of thumb, branch circuit voltage has not drop more than 3% in branch wiring in a building,
5% total voltage drop from the transformer on the pole, to the plug...