3.3 Electrical Installation
NB!
Cables General
All cabling must comply with national and local regulations on cable cross-sections and ambient temperature. Copper (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
Frame size 200 - 240 V 380 - 500 V 525 - 690 V Cable for: Tightening up torque
A1 0.25-1.5 kW 0.37-1.5 kW -
Mains, Brake resistor, load sharing, Motor cables
0.5-0.6 Nm
A2 0.25-2.2 kW 0.37-4 kW -
A3 3-3.7 kW 5.5-7.5 kW -
A4 0.25-2-2 kW 0.37-4 kW
A5 3-3.7 kW 5.5-7.5 kW -
B1 5.5-7.5 kW 11-15 kW - Mains, Brake resistor, load sharing, Motor cables 1.8 Nm
Relay 0.5-0.6 Nm
Earth 2-3 Nm
B2 11 kW 18.5-22 kW 11-22 kW Mains, Brake resistor, load sharing cables 4.5 Nm
Motor cables 4.5 Nm
Relay 0.5-0.6 Nm
Earth 2-3 Nm
B3 5.5-7.5 kW 11-15 kW - Mains, Brake resistor, load sharing, Motor cables 1.8 Nm
Relay 0.5-0.6 Nm
Earth 2-3 Nm
B4 11-15 kW 18.5-30 kW - Mains, Brake resistor, load sharing, Motor cables 4.5 Nm
Relay 0.5-0.6 Nm
Earth 2-3 Nm
C1 15-22 kW 30-45 kW - Mains, Brake resistor, load sharing cables 10 Nm
Motor cables 10 Nm
Relay 0.5-0.6 Nm
Earth 2-3 Nm
C2 30-37 kW 55-75 kW 30-75 kW Mains, motor cables
14 Nm (up to 95 mm
2
)
24 Nm (over 95 mm
2
)
Load Sharing, brake cables 14 Nm
Relay 0.5-0.6 Nm
Earth 2-3 Nm
C3 18.5-22 kW 30-37 kW - Mains, Brake resistor, load sharing, Motor cables 10 Nm
Relay 0.5-0.6 Nm
Earth 2-3 Nm
C4 37-45 kW 55-75 kW - Mains, motor cables
14 Nm (up to 95 mm
2
)
24 Nm (over 95 mm
2
)
Load Sharing, brake cables 14 Nm
Relay 0.5-0.6 Nm
Earth 2-3 Nm
3 How to Install
VLT
®
AutomationDrive FC 300 Operating
Instructions
20
MG.33.AG.02 - VLT
®
is a registered Danfoss trademark
3