Electrical installation
Classic P3 60-150 A
01/2018 - V1
10
Co
nn
ect
io
n
Power connections directly to the mains power supply or via a transformer
The power connections must be protected by
means of fast acting fuses.
The power choke inductance must be >80
µ
H.
The phases of the power connection and the
auxiliary voltage do not have to be equal.
There is an internal watchdog for the power
connection. If the power supply or the fuses
fail, the device switches off and the BTB
contact opens.
L1, L2, L3 right rotating field
Manuals-Zeichnungen-P3-A054-Netz
An auto-transformer can be used.
For motors with a weak voltage steadiness
isolating transformers must be used.
The transformer performance is determined by
the permanent current and the secondary
voltage.
Fast acting fuses must be installed between the
transformer and the control unit.
If the secondary voltages produced by the
transformer are inferior to 60% of the device
type voltage, the voltage watchdog has to be
adapted.
Manuals-Zeichnungen-P3-A054-Trafo
These fuses are monitored for drop-out by the power supply watchdog.
The phases of the secondary voltage of the transformer and the auxiliary voltage do not have to
be equal.
It has to be ensured that the contacts of the contactors on the input side of the transformer are
sufficiently rated for the switch-on current of the transformer. The transformer has to be
protected by means of slow acting fuses.
