Electrical Installation; Removal Of Knockouts For Extra Cables - Danfoss VLT AutomationDrive FC 300 Design Manual

FC 300 Design Guide

Electrical Installation

NB!
Cables General
All cabling must comply with national and local regulations on cable cross-sections and am-
bient temperature. Copper (60/75°C) conductors are recommended.
Aluminium Conductors
Terminals can accept aluminium conductors but the conductor surface has to be clean and the oxidation
must be removed and sealed by neutral acid-free Vaseline grease before the conductor is connected.
Furthermore the terminal screw must be retightened after two days due to softness of the aluminium. It
is crucial to keep the connection a gas tight joint, otherwise the aluminium surface will oxidize again.
Tightening-up Torque
FC size 200 - 240 V
A1 0.25-1.5 kW
A2 0.25-2.2 kW
A3 3-3.7 kW
A5 3-3.7 kW
B1 5.5-7.5 kW
B2 11 kW
C1 15-22 kW
C2 30-37 kW

Removal of Knockouts for Extra Cables

1. Remove cable entry from the frequency converter (Avoiding foreign parts falling into the fre-
quency converter when removing knockouts)
2. Cable entry has to be supported around the knockout you intend to remove.
3. The knockout can now be removed with a strong mandrel and a hammer.
4. Remove burrs from the hole.
5. Mount Cable entry on frequency converter.
84
How to Install
380 - 500 V 525 - 600 V
0.37-1.5 kW -
0.37-4 kW 0.75-4 kW
5.5-7.5 kW 5.5-7.5 kW
5.5-7.5 kW 0.75-7.5 kW
11-15 kW -
18.5-22 kW -
30-45 kW -
55-75 kW -
MG.33.B8.02 - VLT ® is a registered Danfoss trademark
Cable for:
Line, Brake resistor, load
sharing, Motor cables
Line, Brake resistor, load
sharing, Motor cables
Relay
Earth
Line, Brake resistor, load
sharing cables
Motor cables
Relay
Earth
Line, Brake resistor, load
sharing cables
Motor cables
Relay
Earth
Line, Brake resistor, load
sharing cables
Motor cables
Relay
Earth
Tightening up torque
0.5-0.6 Nm
1.8 Nm
0.5-0.6 Nm
2-3 Nm
4.5 Nm
4.5 Nm
0.5-0.6 Nm
2-3 Nm
10 Nm
10 Nm
0.5-0.6 Nm
2-3 Nm
14 Nm
10 Nm
0.5-0.6 Nm
2-3 Nm