10
Phase Rotation Test
Rotary Phase of a Three-Phase Mains
Right Rotary Field
GT-55e
GT-85e
Grasp
firmly
Typical Measurements
GT-55e
GT-85e
Grasp
firmly
Left Rotary Field
In three-phase electrical systems, the phases are
separated by 120 degrees of phase shift. The first phase is
the reference phase; the second phase lags the first by 120
degrees; the third lags the second by 120 degrees.
Three-Phase Voltage Waves
A
B
C
A
B
C
B
C
A
B
C
A
120
°
240
°
360
°