Metalsculptingben Posted May 24, 2015 Share Posted May 24, 2015 I recently added a 42-14 Uni-Hydro to my shop. I don't have three phase, so I have been adding a PhazPak to each three phase motor I have, and I haven't had any problems. I got the Uni-Hydro in the shop and I wired in a PR-3 Phazpak. I have noticed a couple things instantly. On heavy loads the motor will cut off. The first real run of the machine was shearing 100 pickets. It took about an hour to do so. When I was done, the motor was smoking. What have I done wrong, and how can I fix it? Quote Link to comment Share on other sites More sharing options...
the iron dwarf Posted May 24, 2015 Share Posted May 24, 2015 check the specifications of the motor and its exact requirements for power including voltage, current, frequency and check it matches the output of your PR3, as well as checking what the output should be you should measure each parameter and find out if the output is a sine wave or square wave and that the 3 phases are equally spaced.you will have to replace the motor by the sound of it Quote Link to comment Share on other sites More sharing options...
Steve Sells Posted May 24, 2015 Share Posted May 24, 2015 I suggest you contact the electrician that installed this unit for you, hope he has good insurance. It sounds like you need a new motor now in addition to the correct installation of a new 3 phase converter. Quote Link to comment Share on other sites More sharing options...
BIGGUNDOCTOR Posted May 24, 2015 Share Posted May 24, 2015 Look into rotary phase convertors, I have heard of problems before with the static types. Quote Link to comment Share on other sites More sharing options...
arftist Posted May 25, 2015 Share Posted May 25, 2015 I recently added a 42-14 Uni-Hydro to my shop. I don't have three phase, so I have been adding a PhazPak to each three phase motor I have, and I haven't had any problems. I got the Uni-Hydro in the shop and I wired in a PR-3 Phazpak. I have noticed a couple things instantly. On heavy loads the motor will cut off. The first real run of the machine was shearing 100 pickets. It took about an hour to do so. When I was done, the motor was smoking. What have I done wrong, and how can I fix it?The static phase converter is costing you about 1/3 of the available motor horsepower. I don't see this as the electricians fault unless he told you that you would have full horsepower. Since you need a new motor any way I suggest a single phase motor.Otherwise you NEED a rotary phase converter. Big bucks but you get what you pay for. Quote Link to comment Share on other sites More sharing options...
BIGGUNDOCTOR Posted May 25, 2015 Share Posted May 25, 2015 Plus a rotary can run multiple machines. The one I have will start up to a 15hp , and run a combined 60. I needed one that big for my machine shop equipment. It is an ARCO Roto-Phase. Quote Link to comment Share on other sites More sharing options...
Metalsculptingben Posted May 25, 2015 Author Share Posted May 25, 2015 I will most likely replace it with a single phase motor. An expensive lesson learned. Quote Link to comment Share on other sites More sharing options...
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