YOKOGAWA WT200 User Manual page 81

7.4 Setting the Harmonic Order and Displaying the Results of Harmonic Analysis
7-8
Display C
V: Shows each rms (computed) value of the 1st to 50th harmonic component of
the voltage;
A: Shows each rms (computed) value of the 1st to 50th harmonic component of
the current;
W: Shows each rms (computed) value of the 1st to 50th harmonic component of
the active power;
Computation Equation
n
2
V= (V )
k
k=1
n
2
A= (A )
k
k=1
n
W= W
k
k=1
Vk, Ak, Wk: Each component of 1st to 50th order of voltage, current and active
power;
k: Analysis order
n: Maximum order. The maximum order depends on the fundamental
frequency of the input set as the PLL source. For details, see
chapter 16, "Specifications."
V Hz: Shows the fundamental frequency of the voltage of the PLL source. This
frequency applies only to the element selected as PLL source. For details
regarding the PLL source setting, see section 7.2. The measurement range
is the same as in case of normal measurement.
The range of fundamental frequencies in case of harmonic analysis is 40 to
440 Hz. However, depending on internal timing, there are cases where
measurements in the 20 to 700 Hz range can be performed.
A Hz: Shows the fundamental frequency of the current of the PLL source. The rest
is the same as in case of V Hz.
Note
• A bar display appears if you select a display function that is not being analyzed or measured.
• When pressing the FUNCTION key on display A, and the display function becomes V, A or
W, then display A will show the same analysis items as the V, A or W shown on display C.
• Characteristics such as maximum reading, display range, units, etc. which are not described
on the previous page, are not different from the characteristics of normal measurement.
IM 253421-01E