Kikusui PLZ-4W Series, Руководство пользователя

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3-8 For First Time Users PLZ-4W
Fig. 3-5 Transition of the operating point in CC mode (OPP trip point)
Fig. 3-5: Operation on segment AB
If the voltage of the constant-voltage power supply is set to V1 and the input current
(load current) of the PLZ-4W is increased, the operating point moves along segment
AB.
When point B is reached, overpower protection (OPP) trips. At this point, two types
of operation are available on the PLZ-4W depending on the protection action setting
of the OPP.
If the protection action is set to LOAD OFF, an alarm screen indicating OPP
appears, and the load turns off.
If protection action is set to LIMIT, the operating status indicates OPP, and the PLZ-
4W sinks current as a constant power load at point B. Even if you attempt to
increase the input current, the current is limited at point B. If you decrease the input
current, the OPP is cleared, and the operating status indicates C.C. The PLZ-4W
returns to CC mode, and the operating point moves along segment AB.
Table3-1 OPP action (protect action)
Fig. 3-5: Operation on segment CD
If the voltage of the constant-voltage power supply is set to V2 and the input current
(load current) of the PLZ-4W is increased, the operating point moves along segment
CD. Point D is the maximum current at the range being used.
• The OPP action (protection action) and the OPP value are set in advance. For a
description of the action setting, see section 5.13, “Menu Setup.” For a description
of the OPP value setting, see section 5.4, “Setting the Protection Function.” For a
description of the operating status indication, see section 4.4, “Display.”
Point B
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.
Input current [A]
Input
voltage [V]
Logarithmic
scale
A
B
C
(OPP setting)
Constant power line
Operating area
OPP trip point
D
V1
V2
NOTE