Figure 1. The general arrangement of a three phase waveform.
Close-Coupled Vertical Turbine
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.
Nickerson Field Crew
Model 411 Horizontal Split Case
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Horizontal Lathe
3800 Series, Single Stage End Suction
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Horizontal Lathe
Vertical Lathe
Computer Numerical Control Machine (CNC) at Nickerson
Submersible Turbine Pumps
Utah Lake Cascade Pump
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.
Impeller wear ring
SF Series®
Bowl wear ring
Schlumberger Pump Assembly
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
