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.
Bowl wear ring
Computer Numerical Control Machine (CNC) at Nickerson
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Impeller wear ring
Well Pump Installation
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Horizontal Lathe
80 Series® Engine Driven
3800 Series, Single Stage End Suction
Horizontal Lathe
Figure 1. The general arrangement of a three phase waveform.
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Close-Coupled Vertical Turbine
National Pump Vertical Turbine Pumps, API 610
Super T Series® Engine Driven
Utah Lake Cascade Pump
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Impeller wear ring
Vertical Turbine Pumps, Deep Well
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Horizontal Lathe
Vertical Lathe
Bowl wear ring
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.
SF Series®
Computer Numerical Control Machine (CNC) at Nickerson
