Wiring a static phase converter

[marc3909]

Hello all! I picked up a new table saw with a 7.5 three phase motor. I want to convert it to single phase so I ordered a static phase converter. I was wondering if I can wire it after the magnetic breaker to preserve the factory switches. I know I would have to move some wiring around to drop the three phase leg.

 

[cgrutt]

Not sure if I understand what you are trying to do. Does the magnetic starter require 1ph or 3ph? If it is 3ph isn't the 3rd leg supplied by your static phase converter? So l1 to l1 on SPC and L1 on magnetic switch/saw. L2 to L2 on SPC and L2 on magnetic switch/saw. L3 is supplied by the SPC to L3 on magnetic switch/saw.

Keep in mind your motor will not be able to develop stated HP when running with a SPC. You will lose about 1/3 of stated HP.

 

[marc3909]

Here is a schematic of my table saw. This saw has a scoring motor and a main motor.

 

[larry_g]

Can you provide a link to the static converter you ordered? I'm thinking that a static converter does a start routine and then drops out a leg to allow your load to run on two of the three legs. I'm not sure how the start signal would be generated, I'm assuming that you want to use current switches and controls.

That said your machine would work fine on a Rotary phase converter which is not to hard to make if you have the static converter already. Or a top flight converter here, https://www.americanrotary.com/products .

lg
no neat sig line

 

[marc3909]

Not really interested in a rotary. With my other equipment I use VFDs to take advantage of the speed and reversing features. The saw is going to be on or off so I was thinking static would work fine even with losing a bit of power. There isn't a great link, but these are the specs cut and pasted.7-10 hp motors, on a 50 amp breaker and #8wire [I was going to use #6 if possible]

SPC-10 7.5 – 10 50 8 208-240