Kikusui PLZ1004W, User Manual, Page: 195 / 216

PLZ-4W Appendix A-7
Fig. A-8: Operation on segment AB
If the voltage of the constant-voltage power supply is set to V1 and the power of the
PLZ-4W is increased (P
1

P
2

P
B
), the operating point moves along segment AB
(A
1

A
2

B).
When point B is reached, overcurrent protection (OCP) trips. At this point, two
types of operation are available on the PLZ-4W depending on the protection action
setting of the OCP.
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 current
load at point B. Even if you attempt to increase the input current, the current is lim-
ited at point B. If you decrease the input current, the OCP is cleared. The PLZ-4W
returns to CP mode, and the operating point moves along segment AB.
Table A-4 OCP action (protect action)
Fig. A-8: Operation on segment GH
If the voltage of the constant-voltage power supply is set to V3 and the power of the
PLZ-4W is increased (P
1

P
2

P
B
), the operating point moves along segment GH.
Point G is the maximum power at the range being used.
Point B
LOAD OFF
Turns off the load (stops the current flow).
The PLZ-4W no longer operates as a load.
LIMIT
CP mode ends. OCP continues, and the PLZ-4W
sinks current as a constant current load.