2007-12-31 00:23:15 · 6 answers · asked by LES B 1 in Science & Mathematics ➔ Engineering
I agree with the answer that said a 1kW (or higher) step down transformer. but note that "or higher", some portable tools can draw significantly more than rated load with an (intermittent) heavy load. Overloading a transformer causes over heating, but the excess current also over heats the tool, so it will have to be short duration, so both the tool and the transformer might not be seriously affected by heat, but if the transformer core saturates, the output voltage will drop and the tool performance may be unacceptable. so you would be wise to consider a 1500W or even 2000W unit.
Regarding the comment on 50Hz vs. 60Hz., all the line powered portable "drills" I have (I have several) have universal _type_ motors, (however due to the solid state speed controls on most of them, they do require AC) and they should not be affected significantly by the difference in frequency. AC induction motors are affected by frequency, and the previous comment is basically correct, though depending on load and motor construction heating may or may not be a big problem, speed will definitely change.
However the "drills" I have that are powered by induction motors are stationary machines and I would refer to them as a "drill press" rather than just "drill", therefore I assume you are talking about a hand held drill.
2007-12-31 12:49:25 · answer #1 · answered by tinkertailorcandlestickmaker 7 · 0⤊ 0⤋
You can buy transformers made for this but they are a bit pricey. They are 240v in and 110v center tapped secondary. Usually they are yellow and used by contractors since 240v power tools are not allowed but this is often the supply in offices and factories etc. I wouldn't go less than 1.5kVA.
Here is link but there are plenty places to buy them (Tool transformer)
http://www.knighton-tools.co.uk/ACATALOG/copy_of_Transformers.html
A word of warning if you plan to use the drill for contracting. It doesn't meet the spec because the switch will be single pole and it should be double for center tapped supplies. A minor detail no-one will notice probably but if there was an accident, things could get unpleasant.
2008-01-01 10:07:49 · answer #2 · answered by Poor one 6 · 0⤊ 0⤋
You will need a 1000 va transformer rated 240/120 volts, 50Hz in the UK.for you to use the electric drill without burning.
2008-01-02 15:34:34 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Running 60 cycle (USA) motors at 50 cycle (UK) power slows them down and that often causes them to draw more current by design. This over current will lead to over heating with use and can be very dangerous. There is no good solution. Motor driven appliances do not covert properly between power systems.
2007-12-31 05:46:01 · answer #4 · answered by lare 7 · 0⤊ 0⤋
The step-down transformer needs to be rated at 1000VA or higher.
2007-12-31 00:33:17 · answer #5 · answered by Marianna 6 · 0⤊ 0⤋
You'll probably need a step-down transformer to go from the 240 V of the UK to the 120 V for your drill.
Check this out: http://www.soundonsound.com/sos/mar05/articles/qa0305_5.htm
But the most obvious thing to do is to go to an electronics store and they'll sort it out.
2007-12-31 00:29:36 · answer #6 · answered by TC 2 · 0⤊ 0⤋