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.
Impeller wear ring
Model 342A Single Stage End Suction
Horizontal Lathe
Impeller wear ring
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
3800 Series, Single Stage End Suction
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Bowl wear ring
Schlumberger Pump Assembly
380 Series Vertical Inline Pump with VFD
Close-Coupled Vertical Turbine
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Figure 1. The general arrangement of a three phase waveform.
Horizontal Lathe
Vertical Lathe
Custom shapes cut from raw materials.
Nickerson Field Crew
Computer Numerical Control Machine (CNC) at Nickerson
Vertical Turbine Pumps, Deep Well
Utah Lake Cascade Pump
Bowl wear ring
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Computer Numerical Control Machine (CNC) at Nickerson
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
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.
