Figure 3. Three phase power has three identical sine waves overlapping at an offset of 2Ļ/3 radians or 120Ā°. When one phase reaches an x-intercept or node the next phase is only 30Ā° and approximately 5.6 milliseconds from reaching its crest.
National Pump Vertical Turbine Pumps, API 610
Bowl wear ring
Submersible Turbine Pumps
Computer Numerical Control Machine (CNC) at Nickerson
Bowl wear ring
Frame-mount Centrifugal Pumps
Super T SeriesĀ® Engine Driven
Model 411 Horizontal Split Case
Impeller wear ring
Figure 2. A simple sine wave with a period of 360Ā° and an amplitude of 1. In single phase power the x-intercepts are 180Ā° from each other. A full period is 360Ā°. 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.
Figure 1. The general arrangement of a three phase waveform.
Vertical Lathe
Utah Lake Cascade Pump
Horizontal Lathe
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Vertical Turbine Pumps, Deep Well
Vertical Lathe
Computer Numerical Control Machine (CNC) at Nickerson
