3.6.5 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.
Figure 3.45: Always use a torque wrench to tighten the bolts.
Enclosure
Terminal
Torque
Bolt size
D1, D2, D3 and D4
Line Power
Motor
19 Nm (168 in-lbs)
M10
Load sharing
Brake
9.5 (84 in-lbs)
M8
E1 and E2
Line Power
Motor
Load sharing
19 NM (168 in-lbs)
M10
Brake
9.5 (84 in-lbs)
M8
F1, F2, F3 and F4
Line Power
Motor
19 Nm (168 in-lbs)
M10
Load sharing
Brake
Regen
19 Nm (168 in-lbs)
9.5 Nm (84 in-lbs)
19 Nm (168 in-lbs)
M10
M8
M10
Table 3.3: Torque for terminals
3.6.6 Shielded Cables
It is important that shielded and armored cables are connected properly to ensure high EMC immunity and low emissions.
Connection can be made using either cable connectors or clamps:
•
EMC cable connectors: Generally available cable connectors can be used to ensure an optimum EMC connection.
•
EMC cable clamp: Clamps allowing for easy connection are supplied with the adjustable frequency drive.
VLT
®
Automation Drive FC 300
Instruction Manual High Power
3 How to Install
MG.33.U2.22 - VLT
®
is a registered Danfoss trademark
3-47
3