FC 300 Instruction Manual
How to Install
"
Load sharing
With load sharing you can connect several FC 300’s DC intermediate circuits if you extend the
installation using extra fuses and AC coils (see illustration).
NOTE
Load sharing cables must be shielded/armoured. If an unshielded/unarmoured cable is
used, some EMC requirements are not complied with. For more information, see
EMC
specifications
in the
VLT AutomationDrive FC 300 Design Guide
.
Voltage levels of up to 975 V DC may
occur between terminals 88 and 89.
No.
88
89
Loadsharing
DC
DC +
"
Brake Connection Option
The connection cable to the brake resistor
must be shielded/armored.
No. 81 82 Brake resistor
R-
R+ terminals
1.
Use cable clamps to connect the shield to the metal cabinet of the adjustable frequency
drive and to the decoupling plate of the brake resistor.
2.
Dimension the cross-section of the brake cable to match the brake current.
NOTE
Voltages up to 975 V DC (@ 600 V AC) may occur between the terminals.
NOTE
If a short circuit in the brake resistor occurs, prevent power dissipation in the brake resistor
by using a mains switch or contactor to disconnect the mains for the adjustable frequency
drive. Only the adjustable frequency drive can control the contactor.
31
MG.33.A4.22 - VLT is a registered Danfoss trademark
