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.
Frame-mount Centrifugal Pumps
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Submersible Turbine Pumps
Schlumberger Pump Assembly
Bowl wear ring
380 Series Vertical Inline Pump with VFD
Model 411 Horizontal Split Case
Computer Numerical Control Machine (CNC) at Nickerson
Custom shapes cut from raw materials.
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Utah Lake Cascade Pump
Horizontal Lathe
Ultra V Series® and UltraMate®
Utah Lake Cascade Pump
Figure 1. The general arrangement of a three phase waveform.
Vertical Lathe
National Pump Vertical Turbine Pumps, API 610
80 Series® Engine Driven
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Bowl wear ring
Vertical Turbine Pumps, Deep Well
3800 Series, Single Stage End Suction
Computer Numerical Control Machine (CNC) at Nickerson
Impeller wear ring
Model 342A Single Stage End Suction
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.
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
