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