The table outlines the sections' Parameters including Calculation:
PARAMETER DEFINITION
TDD
Total D emand D istortion – TDD –
is t he c urrent distortion
(harmonics above the 1st) as a percent of maximum demand load.
TDD is defined using the following relationship:
THD Even
C = Harmonic RMS Value
n = Harmonic Order
THD Odd
C = Harmonic RMS Value
n = Harmonic Order
Over-
Deviation
The Over-
Deviation indicates how much higher the RMS Voltage is
than the Reference Voltage
Under-
Deviation
The Under-
Deviation indicates how much lower the RMS Voltage is
than the Reference Voltage
UNBALANCE SECTION (AVG, MIN, MAX)
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