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.
Computer Numerical Control Machine (CNC) at Nickerson
Machinist at Nickerson Company running a state-of-the-art CNC machine.
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Model 411 Horizontal Split Case
SF Series®
Submersible Turbine Pumps
Vertical Lathe
Utah Lake Cascade Pump
Figure 1. The general arrangement of a three phase waveform.
Vertical Turbine Pumps, Deep Well
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Impeller wear ring
Computer Numerical Control Machine (CNC) at Nickerson
Model 342A Single Stage End Suction
80 Series® Engine Driven
Schlumberger Pump Assembly
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.
