Computer Numerical Control Machine (CNC) at Nickerson
Bowl wear ring
Schlumberger Pump Assembly
Custom fabrication to a large part
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.
Bowl wear ring
National Pump Vertical Turbine Pumps, API 610
80 Series® Engine Driven
Impeller wear ring
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
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.
Close-Coupled Vertical Turbine
380 Series Vertical Inline Pump with VFD
Vertical Turbine Pumps, Deep Well
Horizontal Lathe
Utah Lake Cascade Pump
Figure 1. The general arrangement of a three phase waveform.
