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.
Close-Coupled Vertical Turbine
Vertical Lathe
Model 342A Single Stage End Suction
80 Series® Engine Driven
Custom fabrication to a large part
Vertical Lathe
Bowl wear ring
SF Series®
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Computer Numerical Control Machine (CNC) at Nickerson
Model 411 Horizontal Split Case
380 Series Vertical Inline Pump with VFD
3800 Series, Single Stage End Suction
Computer Numerical Control Machine (CNC) at Nickerson
Horizontal Lathe
Custom shapes cut from raw materials.
Well Pump Installation
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.
Figure 1. The general arrangement of a three phase waveform.
Impeller wear ring
Frame-mount Centrifugal Pumps
National Pump Vertical Turbine Pumps, API 610
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
