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Users Manual
A linear load with no phase shift.
A linear load with phase shift. A narrow ellipsoid in this pattern usually does not mean there is a problem. For wider ellipsoids, check power factor (PF). If the ellipsoid is backwards (upper left to lower right), check that you have pointed the current probe in the right direction.
A nonlinear load, usually resulting from
A nonlinear load resulting from a
A linear load that is 180 degrees out of phase. A Current Probe pointed in the wrong direction or reversed polarity voltage leads can cause this indication. This incorrect alignment will also cause negative power readings.
A combination of harmonic content and phase shift of the fundamental frequency.
A pattern indicative of a
a14c.eps
Figure 15. Typical VA Check Signatures
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