Kikusui PLZ-30F, Инструкции по эксплуатации, Страница: 169 / 192

PLZ-U Appendix A-9
Fig. A-11 Transition of the operating point in CC+CV mode (OPP trip point)
We denote the voltage of the battery as V
M
. In CC mode, if the current is increased
(I
M1
→
I
M2
→
I
N
) to increase the input current (load current), the operating point
moves along segment MN (M
1
→ M
2
→ N).
When the overpower protection (OPP) setting is P
N
, the OPP trips when point N is
reached.
At this point, two types of operation are available on the PLZ-U depending on the
protection action setting of the OPP.
If the function for turning off the load when the OPP trips is on, the load is turned
off.
If the function for turning off the load when the OPP trips is off (set to limit), the
PLZ-U supplies current as a constant power load at point N. Even if you attempt to
increase the current, the current is limited at point N. If you decrease the current, the
OPP is cleared. The PLZ-U returns to CC mode, and the operating point moves
along segment MN.
Table A-6 Action taken when the OPP trips
If the overpower protection (OPP) setting is P
N1
, the OPP does not trip as the cur-
rent is increased, and the operating point reaches point S.
Here, the operation mode is CV. The voltage is
fi xed to voltage V
Q
set in advance.
In this case, the operating point moves along segment QS. The current is determined
by the battery voltage and its internal resistance.
Point N
Load-off function
on
Turns off the load (stops the current supply).
The PLZ-U no longer operates as a load.
Load-off function
off (limit)
CC mode ends. OPP continues, and the PLZ-U
supplies current as a constant power load.
V
M
V
Q
Q
S
Input voltage [V]
Input current [A]
Logarithmic scale
Constant power line
(OPP setting)
Constant voltage line
(Constant voltage setting)
Operating area
OPP trip point
M
N
I
N
M
1
M
2
P
N
P
N1
Constant current line
(Constant current settings: I
M1
, I
M2
, and I
N
)
I
M1
I
M2