Figure 2. A simple sine wave with a period of 360° and an amplitude of 1. In single phase power the x-intercepts are 180° from each other. A full period is 360°. A single phase motor has a crest approximately every 16.5 milliseconds giving the motors a tendency to vibrate more, which may contribute to a shortened bearing life.
Vertical Turbine Pumps, Deep Well
Computer Numerical Control Machine (CNC) at Nickerson
National Pump Vertical Turbine Pumps, API 610
Submersible Turbine Pumps
Vertical Lathe
3800 Series, Single Stage End Suction
Nickerson Field Crew
80 Series® Engine Driven
Vertical Lathe
Impeller wear ring
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Frame-mount Centrifugal Pumps
Figure 3. Three phase power has three identical sine waves overlapping at an offset of 2π/3 radians or 120°. When one phase reaches an x-intercept or node the next phase is only 30° and approximately 5.6 milliseconds from reaching its crest.
Machinist at Nickerson Company running a state-of-the-art CNC machine.
