Kikusui PLZ164W User Manual page 201

PLZ-4W
We assume that the overcurrent protection (OCP) setting I
I at point N and denote the voltage of the battery as V
N
tance is decreased (R
M1
operating point moves along segment MN (M
When the overpower protection (OPP) setting is P
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 by decreasing the resis-
tance, the current is limited at point N. If you decrease the current by increasing the
resistance, the OPP is cleared. The PLZ-4W returns to CR mode, and the operating
point moves along segment MN.
Table A-8 OPP action (protect action)
LOAD OFF
Point N
If the overpower protection (OPP) setting is P
tance is decreased to increase the current. Consequently, the operating point reaches
point S.
Here, the operation mode is CV. The voltage is fixed to voltage V
In this case, the operating point moves along segment QS. The current is determined
by the battery voltage and its internal resistance.
■ Transition of the operating point: Overcurrent protection
(OCP)
Operating area
R
M1
R
M2
M
M
1
V
M
M
2
T
Q
V
Q
Constant voltage
line
(Constant voltage
setting)
I
OCP
Log scale
Input current [A]
Fig. A-16 Transition of the operating point in CR+CV mode (OCP trip
point)
R R
) to increase the input current (load current), the
M2 N
Turns off the load (stops the current flow).
The PLZ-4W no longer operates as a load.
CR mode ends. OPP continues, and the PLZ-4W
LIMIT
sinks current as a constant power load.
Constant resistance line
(Constant resistance settings: R
OCP trip point
OPP setting
R
T
Constant current line
S
(OCP setting)
I
OCP1
is greater than current
OCP
. In CR mode, if the resis-
M
M N).
1 2
, the OPP trips when point N is
N
, the OPP does not trip as the resis-
N1
Q
, R , and R
M1 M2
set in advance.
)
T
Appendix A-13