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.
Nickerson Field Crew
Computer Numerical Control Machine (CNC) at Nickerson
80 Series® Engine Driven
Schlumberger Pump Assembly
Horizontal Lathe
Ultra V Series® and UltraMate®
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.
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Bowl wear ring
380 Series Vertical Inline Pump with VFD
Custom shapes cut from raw materials.
Horizontal Lathe
Well Pump Installation
Super T Series® Engine Driven
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Model 411 Horizontal Split Case
Frame-mount Centrifugal Pumps
Impeller wear ring
3800 Series, Single Stage End Suction
Vertical Turbine Pumps, Deep Well
Close-Coupled Vertical Turbine
Vertical Lathe
Figure 1. The general arrangement of a three phase waveform.
