Thank you for your reply but I have had my question answered. To anyone who is interested...the number of Y connections does not neccessarily change the number of lead wires needed. One can have 1 Y connection or 2 Y connections with 4 leadwires (A,B,C,Neutral).
Wow,
Having been in the motor manufacturing business for over 15 years, I don't believe I've ever seen a neutral connection brought out of the windings. Of course I haven't seen everything either.
The question is unclear. Are you refering just to supply leads or to leads brought out of the stator winding to make the inter-coil connections needed for high or low voltage operation?
Is this a motor from an airplane? If so, the electrical system is almost always 115Y200 volts 400 Hertz. Most aircraft ground power units produce either that voltage, 28,5 volts DC, or both kinds of power.
that has a 350 KVA 400 Hertz power supply that puts out 575 volts 3-wire 3-phase and up to 8 of these can be paralled. I did not find anything on how to buy stepdown transformers to get 155Y200 volts. I know that the Airbus 380 uses expletiveloads of power so perhaps that mostrosity uses 575 volts 400 Hertz - do not hold me to that.
They also have smaller inverters up to 180 KVA that turn 60 Hertz juice into 115Y200 volts 400 Hz. The units have a 12 pulse rectifier for the 60 Hertz input. There is a table there for the ground power requirements for a quite a few commercial aricraft.
They also carry a line drop compensator for the load end of the line that automatically does power factor correction because inductive loads have more voltage drop than resistaive loads at this voltage.
