Figure 1. The general arrangement of a three phase waveform.
Ultra V Series® and UltraMate®
Frame-mount Centrifugal Pumps
3800 Series, Single Stage End Suction
Well Pump Installation
Horizontal Lathe
Vertical Lathe
Utah Lake Cascade Pump
Impeller wear ring
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
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.
Model 342A Single Stage End Suction
SF Series®
Computer Numerical Control Machine (CNC) at Nickerson
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Bowl wear ring
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.