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yes it was. 3 more, red, blue , white.Assuming the green wire was connected under the terminal cover how many more wires are in that cable.
will be back i bit later...its a sunny day here
Discuss trying to understand 3 phase motor/capacitor installation in the DIY Electrical Advice area at ElectriciansForums.net
yes it was. 3 more, red, blue , white.Assuming the green wire was connected under the terminal cover how many more wires are in that cable.
As it is in sunny N/tonyes it was. 3 more, red, blue , white.
will be back i bit later...its a sunny day here
The problem is the whole set-up is somewhat dangerous and Heath Robinson. It is possible it has never functioned correctly or could be a duff/incorrect capacitor. Either way getting a three phase motor to run from single phase is never practical as the motor will never run efficiently.
Are you sure it's a 3 phase motor, from your description it sound like a single phase job can't be sure though without a pic of the rating plate.
According to my motor textbook,the capacitor for a 1 to 3 phase conversion on a 3/4 h motor is 30mfarad.It may be worth fitting a new capacitor if you feel confident.I'm a qualified mechanic but always tackled small electrical jobs without incident. wonder if i can get some advice re a 60's potters wheel.
it consists of :
-a 220-250 volt 3 phase, c/s 50, motor
-an largish oval capacitor [with a resistor between the 2 contacts] some distance away from motor. A 2 core cable runs from the switch box directly to the capacitor.
-a switch box on outside with 2 buttons, one for on and the other i assume is reset or off.
when switched on it runs extremely slowly for 10 seconds then stops, if you wait for a minute and press what i assume is the reset button, it will start again.
during the 10 seconds it runs you can stop it with one finger at which point it reverses direction.
any help in understanding this installation and why its not working would be much appreciated
m
According to my motor textbook,the capacitor for a 1 to 3 phase conversion on a 3/4 h motor is 30mfarad.It may be worth fitting a new capacitor if you feel confident.
thanks , i will make note of the suggested capacitor but agree it may be a botch, however it apparently ran well for many years on single phase . it was built in the 60's not 80's as Peg mentions in his joke, which i can't fathom
providing i can find a single phase motor that physically fits is the rest straight forward ? [assuming i know something about electrical systems] Regards.S
is thaT GOOD?In the photos showing the contactor connections are some data plates.
Can’t see them too clearly, but in one, you can clearly see 240V.
As others have said,the 3 phase motor must be connected in delta to work off 240v.The capacitor produces another phase.Live and neutral go to 2 motor terminals and the capacitor goes between live and the other motor terminal.Nowhere near as efficient as running on true 3 phase.is thaT GOOD?
thats interesting, am starting to see the complexity of it. are the data plates the ones inside the plastic box, i couldn't see the mention of "240v"I think it would be an idea to have a look at the other data plates which are partly shown in the photos of the contactor terminations.
Reply to trying to understand 3 phase motor/capacitor installation in the DIY Electrical Advice area at ElectriciansForums.net
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