Figure 2. A simple sine wave with a period of 360Ā° and an amplitude of 1. In single phase power the x-intercepts are 180Ā° from each other. A full period is 360Ā°. 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.
Impeller wear ring
National Pump Vertical Turbine Pumps, API 610
Utah Lake Cascade Pump
Model 411 Horizontal Split Case
Well Pump Installation
“NSF/ANSI 61.”Ā NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Figure 3. Three phase power has three identical sine waves overlapping at an offset of 2Ļ/3 radians or 120Ā°. When one phase reaches an x-intercept or node the next phase is only 30Ā° and approximately 5.6 milliseconds from reaching its crest.
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Utah Lake Cascade Pump
Submersible Turbine Pumps
Nickerson Field Crew
Impeller wear ring
Gorman-Rupp SF SeriesĀ® Submersible Solids-handling Pump
