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
Utah Lake Cascade Pump
Impeller wear ring
Custom shapes cut from raw materials.
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.
Horizontal Lathe
80 Series® Engine Driven
Figure 1. The general arrangement of a three phase waveform.
Horizontal Lathe
Utah Lake Cascade Pump
Computer Numerical Control Machine (CNC) at Nickerson
Super T Series® Engine Driven
Frame-mount Centrifugal Pumps
Bowl wear ring
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Vertical Turbine Pumps, Deep Well
Submersible Turbine Pumps
Computer Numerical Control Machine (CNC) at Nickerson
Nickerson Field Crew
National Pump Vertical Turbine Pumps, API 610
Gorman-Rupp SF Series® Submersible Solids-handling Pump
