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13-1
Chapter 13
Unbalance
Introduction
Unbalance displays phase relations between voltages and currents. Measuring results are
based upon the fundamental frequency component (60 or 50 Hz using method of
symmetrical components). In a 3-phase power system, the phase shift between voltages
and between currents should be close to 120°. Unbalance mode offers a Meter screen, a
related Trend display, and a Phasor display.
Meter screen
To access the Unbalance Meter screen:
c
MENU
d
e
ENTER