Table of Contents
6
Operating modes
6.1 Current control function
1070 078 224- -109
PSU 5000 / PSG 3000
Instructions for Assembly and Operation
The setpoint value of the heat is entered in scale divisions (SKT), the resulting sec-
ondary current is automatically adjusted according to the corresponding diagram.
The actual value of the welding current is measured at the secondary side and sig-
nalled to the PSU for comparing the setpoint and actual values.
The current controller is very dynamic. The permanent activity of the controller
(max. delay time 500 msec) provides for a maximum stability of the welding DC.
In the following diagrams, the secondary welding current [kA] is shown depending
on the programmed heat value [scale values SKT] for the individual PSU's. The
tolerance is 3 %.
If the KSR function of the weld timer is available, the current value is specified with
maximum precision in kA after current calibration.
I [kA]
18
16
14
12
10
8
6
4
2
0
0
10
20
PSU 5100.XXX (DIP switch set to PSG 3050, 3075, or 3100)
PSU 5300.XXX (DIP switch set to PSG 3050, 3075)
30
40
50
60
Operating
modes
70
80
90
SKT
6--1
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