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.
Model 411 Horizontal Split Case
Utah Lake Cascade Pump
Schlumberger Pump Assembly
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Computer Numerical Control Machine (CNC) at Nickerson
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.
380 Series Vertical Inline Pump with VFD
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
80 Series® Engine Driven
3800 Series, Single Stage End Suction
Impeller wear ring
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Computer Numerical Control Machine (CNC) at Nickerson
Submersible Turbine Pumps
Impeller wear ring
Ultra V Series® and UltraMate®
National Pump Vertical Turbine Pumps, API 610
Frame-mount Centrifugal Pumps
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
SF Series®
Custom fabrication to a large part
Utah Lake Cascade Pump
Nickerson Field Crew
Vertical Lathe
Horizontal Lathe
Well Pump Installation
Model 342A Single Stage End Suction
Bowl wear ring
Custom shapes cut from raw materials.
Vertical Lathe
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Super T Series® Engine Driven
Bowl wear ring
Figure 1. The general arrangement of a three phase waveform.
