Grinder Pump 1ph, 230V

[Urko]

Good evening everyone,

I am working on a small project. I must to provide power for a new grinder pump, 1ph, 230V, +/- 5% Voltage tolerance, FLA=11.3 Amps.
There is an existing 3ph, 120/208 Y panel with capacity to handle the new grinder pump.
I am going to provide new buck-booster transformer to boost the voltage from primary 208V 1ph to secondary 230V 1ph.
I have done some research in the forum and Internet regarding the buck-booster transformer and I am not still clear for boosted line voltage and voltage to neutral.

My questions are below:

1. Can I use one of the secondary voltage and N to have 120V (for grinder pump control) or I must extend a separate 120V circuit from existing 120/208, 3ph panel?

2. What are grounding requirement for a buck booster transformer?

Thank you in advance.

 

[iMuse97]

You need the boost, because this will keep the amperage down on your motor, and thus extend the life of the equipment, and also get more work out of the pump.

Yes, you can use one leg for control.

As for grounding, you need to ground the case of the transformer, and land the neutral as required in the wiring diagram appropriate for your application. These wires (the EGC and the Neutral) will not be the same, since this is on the load side of your service equipment.