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
Ultra V Series® and UltraMate®
Schlumberger Pump Assembly
Computer Numerical Control Machine (CNC) at Nickerson
Nickerson Field Crew
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Frame-mount Centrifugal Pumps
Bowl wear ring
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
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.
80 Series® Engine Driven
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Well Pump Installation
National Pump Vertical Turbine Pumps, API 610
Horizontal Lathe
Impeller wear ring
Super T Series® Engine Driven
3800 Series, Single Stage End Suction
Impeller wear ring
Model 411 Horizontal Split Case
Horizontal Lathe
Figure 1. The general arrangement of a three phase waveform.
