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.
Well Pump Installation
Vertical Turbine Pumps, Deep Well
Bowl wear ring
Schlumberger Pump Assembly
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.
Impeller wear ring
Impeller wear ring
SF Series®
Model 411 Horizontal Split Case
Frame-mount Centrifugal Pumps
Vertical Lathe
Horizontal Lathe
National Pump Vertical Turbine Pumps, API 610
Horizontal Lathe
Figure 1. The general arrangement of a three phase waveform.
Nickerson Field Crew
Custom fabrication to a large part
Close-Coupled Vertical Turbine
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.
