Figure 1. The general arrangement of a three phase waveform.
National Pump Vertical Turbine Pumps, API 610
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
Vertical Lathe
Bowl wear ring
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Vertical Lathe
SF Series®
Vertical Turbine Pumps, Deep Well
80 Series® Engine Driven
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.
3800 Series, Single Stage End Suction
Frame-mount Centrifugal Pumps
Schlumberger Pump Assembly
Model 411 Horizontal Split Case
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Custom shapes cut from raw materials.
Ultra V Series® and UltraMate®
Model 342A Single Stage End Suction
Computer Numerical Control Machine (CNC) at Nickerson
Impeller wear ring
Impeller wear ring
Well Pump Installation
Gorman-Rupp SF Series® Submersible Solids-handling Pump
