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.
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Impeller wear ring
National Pump Vertical Turbine Pumps, API 610
Super T Series® Engine Driven
Horizontal Lathe
Bowl wear ring
Horizontal Lathe
Horizontal Lathe
Well Pump Installation
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.
Submersible Turbine Pumps
Vertical Turbine Pumps, Deep Well
Model 411 Horizontal Split Case
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
