Kikusui KHA3000, Operation Manual, Page: 177 / 392

7
KHA3000
177
View Setting Sub-menu
Observation, Analysis and Judgem
ent of Harm
onics
●
61000-3-12 2004
When ln/l1[%] is selected with the F4 key
●
61000-3-12 2004
When ln[Arms] is selected with the F4 key
Rsce (short circuit ratio) and limits
This product uses a preset reference Rsce value to determine the limits of each order and
uses them to perform pass/fail judgments. As such, if a pass judgment is obtained,
connection is possible to a power supply that has a short circuit ratio greater than or equal to
the reference Rsce.
The minimum Rsce value (Minimum Rsce (measured)) is displayed in reports. This value is
determined through backcalculation based on the limits corresponding to the average and
maximum values of each harmonic current order measured in the test period.
If you want to check the limit corresponding to the minimum Rsce value, run the test once to
measure the minimum Rsce value. Then, set the reference Rsce value to the obtained value
and run the test again to display the test report and the limit values corresponding to the limit
values of the result list. The measurement time can be short. In principle, a fail judgment may
result due to measurement errors or differences in the phase currents (in the case of three
phase), but this is not abnormal.
Item Order Lim1[%] Lim2[%] Ave[%] Max[%] Per[%] Judge
Description
Harmonic
orders 1st
to 40th.
The 1st
order is the
reference
fundamenta
l current,
THD and
PWHD.
Limit value (A) 150% of the
limit value
(A)
Average
value of all
the test
times. Ratio
(%) to the
reference
fundamental
current
Maximum
value in all
the test
times. Ratio
(%) to the
reference
fundamental
current
Ratio to the limit
value
Judgment
of the limit
values
“ ----- ” means there
is no numeric value
to be displayed:
• When limit values
do not exist
• When a
calculated limit
value is less than
0.0001 A (0.001
A in the 10 A
range or higher)
Display
color
changes.
“ ----- ” means
there is no value
to be displayed:
• In the test
condition
setting state
(real-time
measurement)
Item Order Lim1[%] Lim2[%] Ave[A] Max[A] Per[%] Judge
Description
Harmonic
orders 1st to
40th.
The 1st
order is the
reference
fundamental
current,
THD and
PWHD.
“ ----- ” means there is no
numeric value to be
displayed.
Average
value of all
the test times
(A)
Maximum
value (A) in
all the test
times
Ratio to the limit
value
Judgment
of the limit
values
“ ----- ” means there is no
numeric value to be
displayed:
• When limit values do not
exist
• When a calculated limit
value is less than 0.0001 A
(0.001 A in the 10 A range
or higher)
Display color
changes.
“ ----- ” means
there is no value
to be displayed:
• In the test
condition
setting state
(real-time
measurement)