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.
Vertical Lathe
380 Series Vertical Inline Pump with VFD
Bowl wear ring
Model 411 Horizontal Split Case
Nickerson Field Crew
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Horizontal Lathe
Utah Lake Cascade Pump
Close-Coupled Vertical Turbine
Impeller wear ring
Utah Lake Cascade Pump
3800 Series, Single Stage End Suction
Schlumberger Pump Assembly
Well Pump Installation
Custom shapes cut from raw materials.
Horizontal Lathe
Frame-mount Centrifugal Pumps
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.
Bowl wear ring
Model 342A Single Stage End Suction
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
