Figure 1. The general arrangement of a three phase waveform.
SF Series®
Horizontal Lathe
Nickerson Field Crew
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Submersible Turbine Pumps
Bowl wear ring
380 Series Vertical Inline Pump with VFD
Utah Lake Cascade Pump
Vertical Turbine Pumps, Deep Well
Close-Coupled Vertical Turbine
Custom shapes cut from raw materials.
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Bowl wear ring
Ultra V Series® and UltraMate®
Vertical Lathe
National Pump Vertical Turbine Pumps, API 610
Model 411 Horizontal Split Case
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.
Schlumberger Pump Assembly
Utah Lake Cascade Pump
Horizontal Lathe
Computer Numerical Control Machine (CNC) at Nickerson
Well Pump Installation
Computer Numerical Control Machine (CNC) at Nickerson
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.
