Kikusui PLZ-4W Series, User Manual

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PLZ-4W Appendix A-11
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-4W depending on the
protection action setting of the OPP.
If Protect Action is set to LOAD OFF, the load is turned off.
If protection action is set to LIMIT, the PLZ-4W sinks 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-4W returns to CC
mode, and the operating point moves along segment MN.
Table A-7 OPP action (protect action)
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
Turns off the load (stops the current fl ow).
The PLZ-4W no longer operates as a load.
LIMIT
CC mode ends. OPP continues, and the PLZ-4W
sinks current as a constant power load.