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.
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.
Frame-mount Centrifugal Pumps
Bowl wear ring
Utah Lake Cascade Pump
Horizontal Lathe
Schlumberger Pump Assembly
Vertical Lathe
380 Series Vertical Inline Pump with VFD
3800 Series, Single Stage End Suction
Ultra V Series® and UltraMate®
Nickerson Field Crew
Model 411 Horizontal Split Case
Submersible Turbine Pumps
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Impeller wear ring
National Pump Vertical Turbine Pumps, API 610
Bowl wear ring
Custom shapes cut from raw materials.
Figure 1. The general arrangement of a three phase waveform.
