Danfoss VLT AQUA Drive FC 200 Instruction Manual page 60

VLT AQUA Low Harmonic Drive Instruction
Manual
4.6.4 RFI Switch
Line power supply isolated from ground
If the adjustable frequency drive is supplied from an isolated line power source ( IT line power, floating delta and grounded delta) or TT/TN-S line power
with grounded leg, the RFI switch is recommended to be turned off (OFF)
For further reference, see IEC 364-3. If optimum EMC performance is needed, parallel motors are connected or the motor cable length is above 82 ft [25
m], it is recommended to set par. 14-50
1)
Not available for 525–600/690 V adjustable frequency drives in frame sizes D, E and F.
In OFF, the internal RFI capacities (filter capacitors) between the chassis and the intermediate circuit are cut off to avoid damage to the intermediate
circuit and to reduce the ground capacity currents (according to IEC 61800-3).
Please also refer to the application note
with power electronics (IEC 61557-8).
4.6.5 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 elec-
trical connection. Use a torque wrench to ensure correct torque.
Frame size
D
E
F
Table 4.2: Torque for terminals
1)
RFI Filter
to [ON].
VLT on IT line power, MN.90.CX.02.
Terminal
Line power
Motor
Load sharing
Brake
Line power
Motor
Load sharing
Brake
Line power
Motor
Load sharing
Brake
Regen
®
MG.20.T1.22 - VLT is a registered Danfoss trademark
via par. 14-50 RFI Filter on the drive and par. 14-50
It is important to use isolation monitors that are capable for use together
Figure 4.33: Always use a torque wrench to tighten the
bolts.
Torque
19–40 Nm (168–354 in-lbs)
8.5–20.5 Nm (75–181 in-lbs)
19–40 Nm (168–354 in-lbs)
8.5–20.5 Nm (75–181 in-lbs)
19–40 Nm (168–354 in-lbs)
19–40 Nm (168–354 in-lbs)
8.5–20.5 Nm (75–181 in-lbs)
8.5–20.5 Nm (75–181 in-lbs)
4 How to Install
RFI Filter on the filter.
Bolt size
M10
M8
M10
M8
M10
M10
M8
M8
4
4-43