I have a Dentist/tattoo chair, i have no idea if it works, the cord is cut, when i striped the cable i noticed right a way that it was from europe because of the colour of the wires (green with yellow strip, blue and brown). i couldnt find any lable on the motor, but on one of the parts i noticed it said 50 hz.
My question is, is there anyway i can hook it up without buying a transformer, i just want to test if it works.
Not sure about a Dentist chair, but I have heard of some who have done it with 50 hrz motors running on 60Hrz service only to test it without stepping up the Voltage, although I wouldn't run it for long, the insulation or windings may not like it very much.
Prior to WWII Ontario, Canada used 25 cycle power! We converted to 60 cycle power around 1950.
At that time, there were lots of 25~ motors kicking around and people did use them on 60~.
I think that the 25~ motors had more turns in their windings, that caused them to draw less current. But, they would run. Just not as well, as they would run on 25~.
Its likely that your 50~ motor will run on 60~, but will likely be slower and less powerful.
However, its not likely to blow the breaker or catch fire!
Almost every 50HZ motor will run on 60HZ. If it's an induction motor (the kind without brushes), it'll run about 20% faster. For example, if it ran at 1435 RPM at 50HZ, it'll run at 1725 RPM at 60HZ.
The HP will be about the same, maybe a bit higher.
Current draw will be about the same.
If it were me, and I didn't know the voltage, I'd connect it to 120 first. If it's a 240 volt machine, it will run very slow on 120, or not at all, but a lower voltage will cause much less damage than a higher one will. If it says 240 volts, 50HZ, then you're safe using 240 volts at 60HZ.
If it is indeed 240, then the green/yellow goes to ground, and the other two are the hots. Since both are hot, it doesn't matter which one goes where.
I pulled the glass fuse the chair had and it actually says 250, so im guessing that is volts. Just a quick question, i already have a clothes dryer plug in my garage, it is 240v and i think 30-40 amp breaker. the wires on it are ground, red, white, and black. so i would need to hook it up as green/yellow to Ground, Blue to Black and Brown to Red, and White to Nothing?
The voltage rating of the fuse doesn't indicate the voltage of the unit. It just means that the fuse will work with any voltage that's equal to or lower than what's stamped on it.
The dryer plug connection you described will work.
It is generally safe to run lower frequency (e.g. 50 Hz) motors on higher (e.g. 60) Hz power, checking at first to see if the motor more or less runs properly and well.
It is generally not safe to run higher (e.g. 60) Hz motors on lower (e.g. 50) Hz; you are likely to get oveheating.
Thanks for all the help, i got it working. i was just about to hook it up to my 240V line when i decided to take another look, i pulled a couple of the relay's and they are marked as 110Volts, so i am glad i found that before i hooked it up, i instead hooked it to a 120v line and everything works great.
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