Constant-Current-Regulation (Ksr); Welding Transformer Adjustment - Bosch Rexroth PSI 6 000 Serie Typspezifische Anleitung

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Device functions
voltage.
• A current sensor for measuring the actual current is not necessary.
Refer to Fig.12 Principle of open-loop PHA mode.
8.3.2 Constant‐current‐regulation (KSR)
The KSR function eliminates the influence of the electrical resistance in
the secondary circuit on the weld.
It features:
• There is closed-loop control of the actual current in the secondary circuit.
For this purpose, the actual current is scanned by a current sensor
and compared to the programmed current.
• The programmed current (in kA) is determined by the command value
signal supplied (0 to 10 V
DC
• The welding heat within the welding circuit is influenced by the con-
troller which changes the pulse width as needed.
• A current sensor for measuring the actual current is absolutely necessary.
Refer to Fig.13 Principle of closed-loop KSR mode.
8.4

Welding transformer adjustment

In order to ensure the proper functioning of the power unit in the PSI,various
technical data of the welding transformer used must be known and stored in the
unit.
When using our PSG welding transformers, all technical transformer
data is known to the unit as soon as the PSG type has been entered.
The LT-IB.EXE or LTIBWin parameterization software must be available for
transformer adjustment.
Possible transformer adjustments:
• Integration of transformers from other manufacturers
• parallel/serial connection of several transformers
• Limiting the max. admissible secondary transformer current
• Diode monitoring can be activated/deactivated for protecting the
transformer diodes
Switching the diode monitoring off arbitrarily!
Possible of destroying the power unit or welding transformer.
The diode monitoring should always be switched on.

If diode monitoring is not active, the diodes of the welding transformer are
no longer monitored by the PSI. In the event of excessive load, this may
result in considerable damage to the welding equipment.
1070087044 | PSI 6xxx.000
).
NOTICE