Direction Of Motor Rotation; Thermal Motor Protection; Installation Of Brake Cable - Danfoss VLT AutomationDrive FC 300 Design Manual

FC 300 Design Guide

Direction of Motor Rotation

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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 phases in the motor cable.

Thermal motor protection

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The electronic thermal relay in FC 300 has received the UL-approval for single motor protection,
when parameter 1-26 Motor thermal protection is set for ETR Trip and parameter 1-23 Motor
current, I is set to the rated motor current (see motor nameplate).
M, N

Installation of Brake Cable

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(Only for adjustable frequency drives ordered with brake chopper option).
The connection cable to the brake resistor must be shielded.
1. Connect the shield by means of cable
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.
104
How to Install
MG.33.B3.22 - VLT is a registered Danfoss trademark
No. Function
81, 82 Brake resistor terminals