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8.1
Harmonic Analysis Function
Analyzed/Displayed Items
Display
A
No display function lit
Display function V, A, W
Display
B
Display function
Display
C
Display function
Auto Range Operation
Display Renewal Rate
IM 253401-01E
This chapter explains the harmonics analysis function which can be applied to normal
measurements of voltage, current and power.
After having set the harmonic analysis function to ON, the harmonic component of voltage,
current, or active power, will be analyzed and displayed for one of the input elements (not
applicable for the WT110). Depending on the setting of the display function, the display
changes as follows.
No display function lit
: Displays the harmonic order (1 to 50)
: Displays all rms values (computed values) of 1up to 50
components of voltage, current or active power
FUNCTION
FUNCTION
V
A
FUNCTION
FUNCTION
Adeg
V
: Displays the voltage analysis value of the order shown on display A
A
: Displays the current analysis value of the order shown on display A
W
: Displays the active power analysis value of the order shown on display A
PF
: Displays the power factor of the fundamental (1st order)
V %
: Displays the voltage harmonic distortion, proceeded by "t" on display B
A %
: Displays the current harmonic distortion, proceeded by "t" on display B
V %
: Displays the relative harmonic content of the voltage of the order shown on display A
A %
: Displays the relative harmonic content of the current of the order shown on display A
W %
: Displays the relative harmonic content of the active power of the order shown on
display A
V deg
: · In case the 1st order (fundamental) is shown on display A:
Displays the phase angle between the voltage of the first order and the current of
the first order
· In case the order 2 to 50 is shown on display A:
Displays the phase angle between the voltage of the first order and each voltage of
the 2nd to 50th order
A deg
: · In case the 1st order (fundamental) is shown on display A:
Displays the phase angle between the voltage of the first order and the current of
the first order (same as V deg)
· In case the order 2 to 50 is shown on display A:
Displays the phase angle between the current of the first order and each current of
the 2nd to 50th order
FUNCTION
FUNCTION
V
A
V, A, W
: Displays all rms values (computed values) of 1 up to 50 components of voltage,
current or active power.
V Hz
: Displays the fundamental frequency of the voltage for PLL synchronization
(displays the measurement value for only the selected voltage input)
A Hz
: Displays the fundamental frequency of the current for PLL synchronization
(displays the measurement value for only the selected current input)
The up/down operation of the measurement range is the same as for normal measurement.
Note
When the range changes, the PLL synchronization will be re-established. Therefore, correct
measurement values might not be obtained which might result in an unstable range. If this is the case, set
the measurement range to a fixed range.
Harmonic analysis data will be updated approx. every 3 seconds.
FUNCTION
FUNCTION
FUNCTION
V
A
FUNCTION
FUNCTION
W
PF
V%
FUNCTION
FUNCTION
Vdeg
W%
FUNCTION
FUNCTION
W
V Hz
FUNCTION
W
FUNCTION
FUNCTION
A%
FUNCTION
A%
V%
FUNCTION
A Hz
8-1
8
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