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.
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
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Utah Lake Cascade Pump
Submersible Turbine Pumps
Utah Lake Cascade Pump
380 Series Vertical Inline Pump with VFD
National Pump Vertical Turbine Pumps, API 610
Computer Numerical Control Machine (CNC) at Nickerson
Model 342A Single Stage End Suction
80 Series® Engine Driven
Nickerson Field Crew
Figure 1. The general arrangement of a three phase waveform.
Super T Series® Engine Driven
Horizontal Lathe
Bowl wear ring
Model 411 Horizontal Split Case
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Close-Coupled Vertical Turbine
Schlumberger Pump Assembly
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
3800 Series, Single Stage End Suction
Custom shapes cut from raw materials.
Ultra V Series® and UltraMate®
Machinist at Nickerson Company running a state-of-the-art CNC machine.
