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
Close-Coupled Vertical Turbine
Custom fabrication to a large part
Horizontal Lathe
Super T Series® Engine Driven
380 Series Vertical Inline Pump with VFD
Schlumberger Pump Assembly
National Pump Vertical Turbine Pumps, API 610
3800 Series, Single Stage End Suction
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
80 Series® Engine Driven
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Impeller wear ring
Horizontal Lathe
Horizontal 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.
