Direction Of Motor Rotation; Installation Of Brake Cable - Danfoss FC 300 Design Manual

FC 300 Design Guide
The electronic thermal relay (ETR) of the adjustable frequency drive cannot be used as motor protection for
an individual motor in systems with parallel-connected motors. Provide further motor protection by, e.g.,
thermistors in each motor or individual thermal relays. (Circuit breakers are not suitable as protection).

Direction of Motor Rotation

"
The default setting is clockwise rotation
with the adjustable frequency drive output
connected as follows.
Terminal 96 connected to U-phase
Terminal 97 connected to V-phase
Terminal 98 connected to W-phase
The direction of motor rotation is changed by
switching two motor phases.

Installation of Brake Cable

"
(Only for adjustable frequency drives ordered with brake chopper option).
The connection cable to the brake resistor must be shielded.
Connect the shield by means of cable
1.
clamps to the conductive back plate on the
adjustable frequency drive and to the metal
cabinet of the brake resistor.
2. Size the brake cable cross-section to
match the brake torque.
See Brake instructions, MI.90.FX.YY and MI.50.SX.YY for more information about safe installation.
NOTE
Voltages up to 960 V DC, depending on the supply voltage, may occur on the terminals.
How to Install
MG.33.B6.22 - VLT is a registered Danfoss trademark
No. Function
81, 82 Brake resistor terminals
117