Torque; Shielded Cables; Motor Cable - Danfoss VLT FC 100 Operating Instructions Manual

4 Electrical Installation

4.1.5 Torque

When tightening all electrical connections it is very important to tighten
with the correct torque. Too low or too high torque results in a bad
electrical connection. Use a torque wrench to ensure correct torque
4
Nm/in-lbs
Illustration 4.14: Always use a torque wrench to tighten
the bolts.

4.1.6 Shielded Cables

Danfoss recommends to use shielded cables between
the LCL filter and the AFE unit. Unshielded cables can
be between transformer and LCL filter input side.
It is important that shielded and armoured cables are connected in a
proper way to ensure the high EMC immunity and low emissions.

4.1.7 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 fac-
tory setting is for clockwise rotation with the frequency converter out-
put connected as follows:
Terminal No. Function
96, 97, 98, 99 Mains U/T1, V/T2, W/T3
Earth
62
Frame size
D
E
F
Table 4.1: Torque for terminals
The connection can be made using 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 sup-
plied with the frequency converter.
• 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 changing the setting of par. 4-10
Direction .
MG.11.F3.02 - VLT ® is a registered Danfoss trademark
VLT HVAC Drive High Power Operating In-
Terminal Torque Bolt size
Mains 19-40Nm
Motor (168-354 in- M10
lbs)
Load sharing 8.5-20.5Nm
M8
Brake (75-181 in-lbs)
Mains 19-40Nm
Motor (168-354 in- M10
Load sharing lbs)
Brake 8.5-20.5Nm
M8
(75-181 in-lbs)
Mains 19-40Nm
Motor (168-354 in- M10
lbs)
Load sharing 19-40Nm
Brake (168-354 in-
Regen lbs) M10
8.5-20.5Nm M8
(75-181 in-lbs) M8
8.5-20.5Nm
(75-181 in-lbs)
U V W
96 97 98
U V W
96 97 98
structions
Motor Speed