Kikusui PLZ-4W Series, Руководство пользователя

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PLZ-4W Appendix A-5
If protection action is set to LIMIT, the PLZ-4W sinks current as a constant power
load at point B. Even if you attempt to increase the input current by decreasing the
resistance, the current is limited at point B. If you decrease the input current by
increasing the resistance, the OPP is cleared. The PLZ-4W returns to CR mode, and
the operating point moves along segment AB.
Table A-2 OPP action (protect action)
■
Transition of the operating point: Overcurrent protection
(OCP)
Fig. A-6 Transition of the operating point in CR mode (OCP trip point)
If the overcurrent protection (OCP) setting I
OCP
is less than the current value I
B
at
point B, when the PLZ-4W resistance is decreased (R
1
→
R
2
→
R
F
) and the input cur-
rent (load current) is increased with the voltage of the constant-voltage power sup-
ply at V1, the operating point moves along segment AF (A
1
→
A
2
→
F). When point F
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 F. Even if you attempt to increase the input current by decreasing the
resistance, the current is limited at point F. If you decrease the input current by
increasing the resistance, the OCP is cleared. The PLZ-4W returns to CR mode, and
the operating point moves along segment AF.
Table A-3 OCP action (protect action)
Point B
LOAD OFF
Turns off the load (stops the current fl ow).
The PLZ-4W no longer operates as a load.
LIMIT
CR mode ends. OPP continues, and the PLZ-4W
sinks current as a constant power load.
Point F
LOAD OFF
Turns off the load (stops the current fl ow).
The PLZ-4W no longer operates as a load.
LIMIT
CR mode ends. OCP continues, and the PLZ-4W
sinks current as a constant current load.
Input current [A]
Input
voltage [V]
Log scale
V1
A
B
Operating area
OCP trip point
Constant resistance line
(Constant resistance settings: R
1
, R
2
, and R
F
)
I
B
I
OCP
A
1
A
2
R
1
R
2
R
F
F
Constant current line
(OCP setting)