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.
SF Series®
Vertical Turbine Pumps, Deep Well
Utah Lake Cascade Pump
Schlumberger Pump Assembly
Bowl wear ring
Frame-mount Centrifugal Pumps
3800 Series, Single Stage End Suction
Well Pump Installation
Bowl wear ring
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
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Ultra V Series® and UltraMate®
Submersible Turbine Pumps
Impeller wear ring
National Pump Vertical Turbine Pumps, API 610
Model 411 Horizontal Split Case
Vertical Lathe
Super T Series® Engine Driven
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Impeller wear ring
Custom shapes cut from raw materials.
Computer Numerical Control Machine (CNC) at Nickerson
Figure 1. The general arrangement of a three phase waveform.
