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.
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Impeller wear ring
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Bowl wear ring
Model 411 Horizontal Split Case
SF Series®
Horizontal Lathe
Horizontal Lathe
Vertical Turbine Pumps, Deep Well
Computer Numerical Control Machine (CNC) at Nickerson
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Figure 1. The general arrangement of a three phase waveform.
80 Series® Engine Driven
380 Series Vertical Inline Pump with VFD
National Pump Vertical Turbine Pumps, API 610
Vertical Lathe
Utah Lake Cascade Pump
Model 342A Single Stage End Suction
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Horizontal Lathe
Impeller wear ring
Ultra V Series® and UltraMate®
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.
Close-Coupled Vertical Turbine
Vertical Lathe
Computer Numerical Control Machine (CNC) at Nickerson
Super T Series® Engine Driven
Frame-mount Centrifugal Pumps
Machinist at Nickerson Company running a state-of-the-art CNC machine.
