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Operating Instructions AEC
11/17
AEC
C
U
AC
U
DC
W
total
W / R
W
max
/ R
R
[mF]
[V]
[V]
[Ws]
[Ws]
[Ws]
[Ohm]
400V/250kW
9
400
565.69
1440
480
3500
2.8
400V/400kW
18
400
565.69
2880
960
3500
2.8
Use fuses type gL ≥ 160 A for the precharging circuit. In case the total power is higher, the
precharging circuit must be designed for higher power values accordingly.
The following circuit suggestions must be adjusted to the specific application and relevant regulations.
When the main switch is turned on directly after it was turned off before the waiting time has elapsed, the
mains unit may be damaged.
To avoid this, a precharging circuit as shown in the illustration must be set up.
When the main switch is opened, the DC-link voltage of the mains unit will only drop slowly due to the DC
link capacitors. The contact at relay X10 is maintained between terminals two and three until the DC-link
voltage has dropped between a certain value. When the main switch is closed again, the mains unit is
connected to mains via the inverter and can be destroyed as a result. In the circuit suggested, contactor
K3 opens power supply of contactor K2 so that contactor K2 disconnects the connection between the AEC
mains unit and mains.
NOTE
The AEC mains unit requires separate wiring of the main power circuit and the
DC-link precharging circuit.
An external precharging circuit must be installed in order to protect the mains
unit from the destructive charging currents of the DC link capacitors.
Precharging contactors must be selected per the specific application
requirements. Contact your BONFIGLIOLI contact for information on this.
The mains unit features an internal precharging circuit between the rectifier and the DC link capacitors. This
precharging circuit closes the contact once a certain DC link voltage is reached. However, the precharging
circuit does not limit the current when the mains unit is connected to mains supply, as the AEC is connected
to mains via the inverter.
8.3.4
Feed-back unit power connection
The feed-back unit is integrated in a system typically comprising the following components:
Feed-back unit AEC
Line chokes
Radio interference filter
Содержание AEC 401 Series
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