ABB IM300-I Operational Manual page 19

3.2.2. Harmonic distortion ratio and harmonic components
In either a single bond display press
area harmonic distortion ratio, harmonic components,voltage
/current unbalanced degree and K-factor of current, etc.
In the harmonic content display mode, press
top left of the screen display after the words 'UP', then press
button to scroll upward; press
screen display after the words 'DWN', press
down.
Screen 1: Display the total harmonic distortion ratio of
3-phase voltage
"H－U" displayed at the left top corner of the screen .
When the connection mode is set as 3-phase 4-wire system,
3-phase voltage Ua, Ub, Uc of THD is shown as fig 3.2.10:
THD_Ua＝0.6％；THD_Ub＝0.6％；
THD_Uc＝0.6％；
When the connection mode is set as 3-phase
3-wire system, 3-phase line voltage Uab, Ubc,
Uca of THD is shown as fig 3.2.11:
THD_Uab＝0.6％；THD_Ubc＝0.6％；
THD_Uca＝0.6％；
Screen 2: Display the total harmonic distortion ratio of
3-phase current and zero-sequence current.
"H－I" displayed at the left top corner of the screen.
The parameters are shown in fig 3.2.12:
THD_Ia＝0.6％；THD_Ib＝0.6％；
THD_Ic＝0.6％；THD_In＝0.6％；
Screen 3: Display the odd harmonic distortion ratio of
3-phase voltage
"HUO" displayed at the left top corner of the screen.
when the connection mode is set as 3-phase 4-wire system,
3-phase voltage Ua, Ub, Uc of odd THD is shown
as fig 3.2.13:
THD_O_Ua＝0.6％；THD_O_Ub＝0.6％；
THD_O_Uc＝0.6％；
when the connection mode is set as 3-phase 3-wire system,
3-phase line voltage Uab, Ubc, Uca of odd THD is shown
in fig 3.2.14:
IM300 Intelligent Power Monitoring Instrument
button display
button until the
button until the top left of the
button to scroll
17
Fig 3.2.10 THD of 3-phase voltage
Fig 3.2.11 THD of 3-phase line
voltage
Fig 3.2.12 THD of 3-phase current
and zero-sequence current
Fig 3.2.13 Odd THD of 3-phase voltage