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.
Schlumberger Pump Assembly
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Computer Numerical Control Machine (CNC) at Nickerson
Vertical Lathe
Horizontal Lathe
Computer Numerical Control Machine (CNC) at Nickerson
Bowl wear ring
Vertical Turbine Pumps, Deep Well
Ultra V Series® and UltraMate®
Horizontal Lathe
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Vertical Lathe
380 Series Vertical Inline Pump with VFD
Well Pump Installation
SF Series®
National Pump Vertical Turbine Pumps, API 610
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Impeller wear ring
Frame-mount Centrifugal Pumps
3800 Series, Single Stage End Suction
Close-Coupled Vertical Turbine
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Model 411 Horizontal Split Case
Bowl wear ring
Horizontal Lathe
Super T Series® Engine Driven
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.
