Figure 1. The general arrangement of a three phase waveform.
National Pump Vertical Turbine Pumps, API 610
SF Series®
Utah Lake Cascade Pump
Impeller wear ring
Bowl wear ring
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.
Horizontal Lathe
Bowl wear ring
Ultra V Series® and UltraMate®
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Computer Numerical Control Machine (CNC) at Nickerson
Vertical Lathe
Utah Lake Cascade Pump
Submersible Turbine Pumps
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Model 342A Single Stage End Suction
Horizontal Lathe
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Gorman-Rupp SF Series® Submersible Solids-handling Pump
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.
Frame-mount Centrifugal Pumps
Close-Coupled Vertical Turbine
Impeller wear ring
Vertical Lathe
Vertical Turbine Pumps, Deep Well
Computer Numerical Control Machine (CNC) at Nickerson
3800 Series, Single Stage End Suction
Nickerson Field Crew
Horizontal Lathe
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
