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.
380 Series Vertical Inline Pump with VFD
Well Pump Installation
Computer Numerical Control Machine (CNC) at Nickerson
Model 342A Single Stage End Suction
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Nickerson Field Crew
Super T Series® Engine Driven
SF Series®
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.
Horizontal Lathe
Impeller wear ring
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Close-Coupled Vertical Turbine
Model 411 Horizontal Split Case
Schlumberger Pump Assembly
Computer Numerical Control Machine (CNC) at Nickerson
Ultra V Series® and UltraMate®
Horizontal Lathe
Figure 1. The general arrangement of a three phase waveform.
