Pierre Hi, one link i have found for you about your 3 phase capasitor start is http:/= /home.att.net/%7Ewaterfront-woods/Articles/phaseconverter.htm I have more but will take a while to sort out, also have you looked at the = special interests books by Jim Cox on motors=20 1. Electrics in the home workshop-workshop pratice series-Book No 24 and IS= DN 1-85486-133-6 2. Electic Motors-workshop pratice series-Book No 16 and ISDN 0-85242-914-2 Both of these book give lots of very usefull information and the books are = very cheap,About =C2=A37.00 each The rest of the list members i am sure will have other information but this= will give you a start. Regards John Burridge > Message Received: May 09 2006, 11:26 PM > From: "Pierre Courbouleix" <pierre.courbouleix@xxxxxxxxxx> > To: "LIST" <modeleng@xxxxxxxxxxxxx> > Cc:=20 > Subject: [modeleng] Capacitor value >=20 > I intend to use the following motor to drive a small machine as per a rel= iable electrical dwg. : Three phases, 220/380 V , 50 Hz, 1370 RPM, 220 V de= lta I =3D 2 Amps, 380 V star I =3D 1,15 Amps. How to calculate the value of= the capacitors to use this motor with 230 V , single phase, 30 amps (this = is what I have available in the workshop); If one of our fellows ME has som= e knowledge in electrical engineering he will be the right man .... > Thanks > Pierre > MODEL ENGINEERING DISCUSSION LIST. >=20 > To UNSUBSCRIBE from this list, send a blank email to,=20 > modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject= line. >=20 > MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.