Mains Connection; Pre-Fuses; Motor Connection; Direction Of Motor Rotation - Danfoss VLT FCD 303 Operating Instructions Manual

Mains connection

No. 91 92 93 Mains voltage 3 x 380-480 V
L1 L2 L3
PE Earth connection
NB!:
Please check that the mains voltage fits the
mains voltage of the frequency converter, which
can be seen from the nameplate.
See Technical data for correct dimensioning
of cable cross-section.

Pre-fuses

See Technical data for correct dimensioning
of pre-fuses.

Motor connection

Connect the motor to terminals 96, 97, 98.
Connect earth to PE-terminal.
No. 96 97 98 Motor voltage 0-100% of mains voltage
U V W 3 wires out of motor
U1 V1 W1 6 wires out of motor, Delta connected
W2 U2 V2
U1 V1 W1 6 wires out of motor, Star connected
U2, V2, W2 to be interconnected
separately (optional terminal block)
PE Earth connection
See Technical data for correct dimensioning
of cable cross-section.
All types of three-phase asynchronous standard
motors can be connected to a frequency converter.
Normally, small motors are star-connected (230/400
V, / Y). Large motors are delta-connected (400/690
V, / Y). The correct connection mode and voltage
can be read from the motor nameplate.
NB!:
In motors without phase insulation paper,
an LC filter should be fitted on the output
of the frequency converter.
16
®
VLT FCD Series

Direction of motor rotation

The factory setting is for clockwise rotation
with the frequency converter transformer 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 rotation can be changed by switching
two phases on the motor terminals.

Mains and motor connection with service switch

MG.04.B7.02 - VLT is a registered Danfoss trademark