I put this question recently as part of another post, but on re-reading realised it
was confusing, so here it is again, but more accurately. I'm starting 2 s.ph 230v motors, running duplex, a 3.ph alternator. 2 new starters have been fitted, BUT THEY'RE 3 PHASE MODELS, (the only ones I could get locally, this being an agricultural area). Part of the assembly is an overload module, which must be used as the stop switch mech is integral with it. Motors have their own thermal overloads, which I don't think is an issue. I could run each motor, and hence one starter module overload, just through say L1-U , leaving L2-V and L3-W out of circuit, or run all three module overloads in parallel to 'share' the load, or snake through the device in series so:
L1-U , U loop V , L2-L3, W to motor. I have opted for the latter, with no switched Neutral, although that is another option (?) -if I ran L1-U-loop V, L2 to motor, motor return to L3, W to Neutral. I chose 16A models and have set the module O/Ls at 13A. The single phase breakers are 25A each, one per motor.
Have I done this correctly? -I've fired it up and it works- but I can see advantages/disadvantages in all the options.
I start motors in sequence to reduce the initial amps pulled, by the way.
(They're Sneider-Telemecanique LE1D/12 model with LRD16 relay module with a 230v coil.)
Alan
