Test Sets For Motor & Generator Industries are designed for no-load loss as well as heat run testing. They are ideal for offering clean power with precise regulation as well as voltage control. These sets are designed when there is no need of frequency conversion. With variable-frequency drive of these sets, they are used to select any output frequency from 50 Hz to 60 Hz. in addition to this, for larger requirements, from 50-to-200 Hz, this has been used as one of the most economical testing sets.