Figure 1. The general arrangement of a three phase waveform.
Model 411 Horizontal Split Case
Super T Series® Engine Driven
Horizontal Lathe
Bowl wear ring
Vertical Lathe
Schlumberger Pump Assembly
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.
Bowl wear ring
Computer Numerical Control Machine (CNC) at Nickerson
380 Series Vertical Inline Pump with VFD
Vertical Lathe
Horizontal Lathe
SF Series®
Well Pump Installation
Model 342A Single Stage End Suction
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Horizontal Lathe
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Computer Numerical Control Machine (CNC) at Nickerson
Close-Coupled Vertical Turbine
Submersible Turbine Pumps
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
National Pump Vertical Turbine Pumps, API 610
Frame-mount Centrifugal Pumps
Impeller wear ring
Custom fabrication to a large part
3800 Series, Single Stage End Suction
Impeller wear ring
Utah Lake Cascade Pump
80 Series® Engine Driven
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.
