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