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Old 12-29-2011, 02:38 PM
oldred oldred is offline
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That's a phase converter not a phase "adder" and whether it will work or not depends on what type it is. A static phase converter is just a box that wires into the circuit and allows the motor to run but it will produce only 2/3 of it's rated power so your 3 HP motor becomes only 2 HP, these don't work well with compressor duty anyway. The rotary type converters use a large capacitor pack and another "idler" motor of equal or greater power rating and this type should work ok since they will allow full power and take the repeated start loads but as expensive as they are it's not likely he is going to throw in one of those for free, a static converter for a 3 HP motor costs about $100 to $150 while the rotary type is around $800 to $1000 plus there is a big demand for used ones. If he is indeed going to throw in a rotary type converter and it is in working order it would be worth far more than the compressor so that would be a good deal but if he is talking about the cheap static type converter it's not going to work.
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