Figure 1. The general arrangement of a three phase waveform.
Custom fabrication to a large part
National Pump Vertical Turbine Pumps, API 610
Impeller wear ring
Submersible Turbine Pumps
Utah Lake Cascade Pump
Horizontal Lathe
Nickerson Field Crew
Vertical Lathe
Utah Lake Cascade Pump
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.
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Super T Series® Engine Driven
80 Series® Engine Driven
Schlumberger Pump Assembly
Model 411 Horizontal Split Case
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.
