Overview Similar Products –> Product Description PRT-5 Packaged Rotary (Less Idler Motor) for operating 3-phase 230V Motor with single phase 230V input For use on HEAVY Starting loads, where full horsepower IS REQUIRED. These models REQUIRE an idler motor that is at least 50% larger than the largest motor being started. IDLER HP required but not included – 5 Length – 12″ Width – 10″ Height – 6″ Product Videos Custom Field Product Reviews