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.
380 Series Vertical Inline Pump with VFD
National Pump Vertical Turbine Pumps, API 610
Well Pump Installation
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Close-Coupled Vertical Turbine
Utah Lake Cascade Pump
Custom shapes cut from raw materials.
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Model 411 Horizontal Split Case
Figure 1. The general arrangement of a three phase waveform.
Impeller wear ring
Ultra V Series® and UltraMate®
Vertical Lathe
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
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.
Super T Series® Engine Driven
3800 Series, Single Stage End Suction
Submersible Turbine Pumps
Horizontal Lathe
Bowl wear ring
Computer Numerical Control Machine (CNC) at Nickerson
