Kikusui PLZ-5W Series User Manual page 120

Operating Area
120
Transition of the operating point: Overcurrent protection (OCP)
operation
Operating area
R
M1
R
M2
M
M
1
V
M
M
2
T
Q
V
Q
Constant voltage line
(constant voltage setting)
I
Logarithmic scale
OCP
Input current (A)
We assume that OCP setting I
power protection (OPP) and denote the voltage of the battery as V
tance is decreased (R →R
M1
operating point moves along segment MT (M
If the OCP setting is I , the OCP is activated when point T is reached. At this point, two
OCP
types of operation are available on the PLZ-5W depending on which action is set to be exe-
cuted at OCP detection.
If the action set to be executed at OCP detection is Trip, load off is executed.
If the action set to be executed at OCP detection is Limit, the PLZ-5W sinks current as a con-
stant current load at point T. Even if you attempt to increase the current by decreasing the
resistance, the current is limited at point T. If you decrease the current by increasing the resis-
tance, the OCP is cleared. The PLZ-5W returns to CR mode and the operating point moves
along segment MT.
Trip Turns off the load (stops the current flow). The PLZ-5W no longer operates as a load.
Point T
CR mode ends. OCP continues, and the PLZ-5W sinks current as a constant current
Limit
load.
If the OCP setting is I
OCP1
ing the resistance, and the operating point reaches point S.
Here, the operation mode is CV. The voltage is fixed to voltage V
case, the operating point moves along segment QS. The current is determined by the battery
voltage and its internal resistance.
Constant resistance line
(Constant resistance settings: R
OCP trip point
OPP setting
R
T
S
Constant current line
(OCP setting)
I
OCP1
is less than the current produced by tripping of the over-
OCP
→R ) to increase the input current (load current), the
M2 T
→M →T).
1 2
, the OCP is not activated as the current is increased by decreas-
10.Appendix
, R , R )
M1 M2 T
. In CR mode, if the resis-
M
set in advance. In this
Q
PLZ-5W