Figure 1. The general arrangement of a three phase waveform.
Computer Numerical Control Machine (CNC) at Nickerson
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.
Model 411 Horizontal Split Case
Frame-mount Centrifugal Pumps
Super T Series® Engine Driven
Vertical Turbine Pumps, Deep Well
Model 342A Single Stage End Suction
Submersible Turbine Pumps
Utah Lake Cascade Pump
Impeller wear ring
Close-Coupled Vertical Turbine
Horizontal Lathe
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.
Ultra V Series® and UltraMate®
SF Series®
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Well Pump Installation
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Bowl wear ring
Impeller wear ring
80 Series® Engine Driven
Computer Numerical Control Machine (CNC) at Nickerson
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
National Pump Vertical Turbine Pumps, API 610
380 Series Vertical Inline Pump with VFD
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.
