BONFIGLIOLI Device Serie Guia De Inicio Rapido página 78

4.4.1 Precharging circuit mains unit
Relay X10 is controlled by the mains unit through the DC-link voltage. The
GB
discharging operation of the DC link capacitors delays the switching operation
of relay X10. The mains unit control ensures that the precharging circuit will be
switched on first before connection to mains supply.

The mains unit may only be connected to mains via the precharging
circuit.
 Jog operation of the mains contactor is not permissible.
 When disconnected from mains supply, the mains unit may only be
reconnected to mains supply after a defined waiting time.
 If precharging is not controlled via control terminal X10, the waiting time,
e.g. by time links, must be considered.
 The mains power circuit (mains fuses, contactor K2) must be designed for
the power of the AEC mains unit.
 Use the following table when designing the precharging circuit (precharge
fuse, contactor K1):
AEC
400V/250kW
400V/400kW
 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.
76
The terminal identifiers (X1) and (X2) shown in the following
illustration apply to devices of sizes 3 through 6. Devices as from
size 7 feature appropriate contact pins.
C U
AC
[mF] [V]
9 400
18 400
Quick Start Guide AEC
U W W / R
DC total
[V] [Ws] [Ws]
565.69 1440
565.69 2880
W / R
max
[Ws]
480 3500
960 3500
R
[Ohm]
2.8
2.8
06/19