Thanks to One Fat Frog Commercial & Restaurant Equipment for this guide to 3 phase electric converter use in restaurant equipment.  This guide shall work as a quick fact guide for the topic, it should not replace the consultation or services of a licensed electrician. 

When buying used restaurant equipment it is integral that you figure out the power source- natural gas, LP gas, single phase electric or three phase electric.  This may determine whether or not the equipment will work in your facility.  Now, there are a few possibilities on three phase- does your building perhaps have three phase and your business doesn't have it?  If this is true then it's merely a line pull by a licensed electrician.  If you don't have three phase you can look at purchasing a phase converter.  You will want to talk to manufacturer service technician and/ or local electrician about using a phase converter with specific equipment. 

But, this opens up opportunities in purchasing specialized used restaurant equipment. 

Don't forget to search for your phase converter on eBay!