Loadsharing; Brake Connection Option - Danfoss FC 302 Instruction Manual

FC 300 Instruction Manual
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.

Brake Connection Option

"
The connection cable to the brake resistor
must be shielded/armored.
Use cable clamps to connect the shield to the metal cabinet of the adjustable frequency
1.
drive and to the decoupling plate of the brake resistor.
Dimension the cross-section of the brake cable to match the brake current.
2.
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.
How to Install
MG.33.A4.22 - VLT is a registered Danfoss trademark
No. 88 89

Loadsharing

DC DC +
No. 81 82 Brake resistor
R- R+ terminals
31