Figure 1. The general arrangement of a three phase waveform.
Frame-mount Centrifugal Pumps
Well Pump Installation
Ultra V Series® and UltraMate®
Horizontal Lathe
Close-Coupled Vertical Turbine
National Pump Vertical Turbine Pumps, API 610
Gorman-Rupp SF Series® Submersible Solids-handling Pump
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.
Custom fabrication to a large part
80 Series® Engine Driven
Vertical Lathe
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.
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Vertical Lathe
Model 411 Horizontal Split Case
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Schlumberger Pump Assembly
Impeller wear ring
Horizontal Lathe
Horizontal Lathe
Submersible Turbine Pumps
Computer Numerical Control Machine (CNC) at Nickerson