Danfoss VLT Automation Drive FC 300 Operating Instructions Manual page 58

3. How to Install
Recommended F2/F4 connections: Motor phase cable quantities should be 3, 6, 9, or 12(multiples of 3) to obtain equal amount of wires attached to each
inverter module terminal. The wires are recommended to be equal length between the inverter module terminals and the first common point of a phase.
The recommended common point is the motor terminals.
Requirements for output junction box: The length, minimum 2.5 meters, and quantity of cables must be equal from each inverter module to the common
terminal in the junction box.
NB!
3
If a retrofit applications requires unequal amount of wires per phase please consult the factory for requirements.
3.6.8. Brake Cable
(Only standard with letter B in position 18 of typecode).
Terminal No.
81, 82
The connection cable to the brake resistor must be screened. Connect the screen by means of cable clamps to the conductive back plate at the frequency
converter and to the metal cabinet of the brake resistor.
Size the brake cable cross-section to match the brake torque. See also
safe installation.
Please note that voltages up to 1099 VDC, depending on the supply voltage, may occur on the terminals.
F Enclosure Recommendations/Requirements
The brake resistor(s) must be connected to the brake terminals in each inverter module.
3.6.9. Load Sharing
(Only extended with letter D in position 21 of the typecode).
Terminal No.
88, 89
The connection cable must be screened and the max. length from the frequency converter to the DC bar is limited to 25 metres (82 feet).
Load sharing enables linking of the DC intermediate circuits of several frequency converters.
Please note that voltages up to 1099 VDC may occur on the terminals.
Load sharing calls for extra equipment. For further information please contact Danfoss.
58
Function
Brake resistor terminals
Brake Instructions, MI.90.Fx.yy
Function
Loadsharing
MG.33.U2.02 - VLT ® is a registered Danfoss trademark
®
VLT Automation Drive FC 300
Operating Instructions High Power
MI.50.Sx.yy
and for further information regarding