PLZ-4WH
141
Operating Area
App.
If the protection action is set to LIMIT, the PLZ- 4W sinks current as a constant-power load at
point B. Even if you attempt to decrease the resistance to increase the current, the current
will not increase beyond point B. If you increase the resistance to decrease the input current,
overpower protection (OPP) is cleared. The PLZ-4WH returns to constant resistance (CR)
mode, and the operating point moves along segment AB.
Transition of the operating point: overcurrent protection (OCP)
If the overcurrent protection (OCP) setting I
OCP
is less than the current value IB at point B,
when the PLZ-4WH resistance is decreased (R
1
→
R
2
→
R
F
) so that the input current (load
current) increases, with the voltage of the constant-voltage power supply at V1, the operating
point moves along segment AF (A
1
→
A
2
→
F). When point F is reached, overcurrent protection
(OCP) is activated.
At this point, one of two types of operations occurs, depending on the protection action
setting for OCP. If the protection action is set to LOAD OFF, the load turns off.
If the protection action is set to LIMIT, the PLZ- 4W sinks current as a constant-current load at
point F. Even if you attempt to decrease the resistance to increase the current, the current will
not increase beyond point F. If you increase the resistance to decrease the input current,
overcurrent protection (OCP) is cleared. The PLZ-4WH returns to constant resistance (CR)
mode, and the operating point moves along segment AF.
Point B
LOAD OFF
The load is turned off (no current flows).
The PLZ-4WH stops operating as a load.
LIMIT
The PLZ-4WH switches out of constant resistance (CR) mode.
Overpower protection (OPP) continues, and the PLZ-4WH
operates as a constant-power load.
Input current [A]
Input voltage [V]
Logarithmic scale
V1
A
B
Operating area
OCP activation point
Constant resistance line
I
B
I
OCP
A
1
A
2
R
1
R
2
R
F
F
Constant current line
(OCP setting)
(constant resistance settings: R
1
, R
2
, and R
F
)
Point F
LOAD OFF
The load is turned off (no current flows).
The PLZ-4WH stops operating as a load.
LIMIT
The PLZ-4WH switches out of constant resistance (CR) mode.
Overcurrent protection (OCP) continues, and the PLZ-4WH
operates as a constant-current load.
Содержание PLZ1004WH
Страница 13: ...Installation and Preparation This chapter describes how to unpack and prepare this product before you use it 1 ...
Страница 28: ...28 PLZ 4WH Remote Sensing ...
Страница 29: ...Basic Functions This chapter explains the operations for each operation mode and other basic functions 2 ...
Страница 47: ...Advanced Operations This chapter explains ABC preset memory setup memory protection functions and the menu 3 ...
Страница 61: ...Sequences This chapter explains the sequence function Sequences 4 ...
Страница 83: ...External Control and Parallel Operation This chapter explains external control and Parallel Operation 5 ...
Страница 115: ...Maintenance This chapter describes the maintenance procedures including cleaning inspection and calibration 7 ...
Страница 127: ...8 Specifications This chapter contains the specifications and gives the dimensions of the PLZ 4WH ...
Страница 137: ...Appendix A Operating Area B Sequence Program Creation Table C Options ...