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