3.5.7. Shielded Cables
It is important that shielded and armoured cables are connected in a proper way to ensure high
EMC immunity and low emissions.
Connection can be made with either cable glands or clamps:
•
EMC cable glands: Generally available cable glands can be used to ensure an optimum
EMC connection.
•
EMC cable clamp: Clamps allowing easy connection are supplied with the frequency con-
verter.
3.5.8. Motor cable
The motor must be connected to terminals U/T1/96, V/T2/97, W/T3/98. Earth to terminal 99. All
types of three-phase asynchronous standard motors can be used with a frequency converter unit.
The factory setting is for clockwise rotation with the VLT frequency converter output connected
as follows:
Terminal No.
Function
96, 97, 98, 99
Mains U/T1, V/T2, W/T3
Ground/Earth
• Terminal U/T1/96 connected to U-phase
• Terminal V/T2/97 connected to V-phase
• Terminal W/T3/98 connected to W-phase
The direction of rotation can be changed by switching two phases in the motor cable or by chang-
ing the setting of par. 4-10.
3.5.9. Brake Cable
(Only standard with letter B in position 18 of typecode).
Terminal No.
Function
81, 82
Brake resistor terminals
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
Brake Instructions, MI.
90.Fx.yy
and
MI.50.Sx.yy
for further information regarding safe installation.
3. How to Install
VLT
®
Automation Drive FC 300
Operating Instructions High Power
54
MG.33.U1.02 - VLT
®
is a registered Danfoss trademark
3