Electrical Installation; Removal Of Knockouts For Extra Cables - Danfoss 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 recommended.
Aluminium Conductors
Aluminium conductors are not recommended.
Terminals can accept aluminium conductors but
the conductor surface has to be clean and the ox-
idation must be removed and sealed by neutal
acid free Vaseline grease before the conductor is
connected.
Tightening-up Torque
FC size
0.25-7.5 kW (A1, A2, A3
and A5)
11-15 kW (B1)
18.5-22 kW (B2)

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.
76
How to Install
Cable for:
Line, Brake resistor, load sharing, Motor ca-
bles
Line, Brake resistor, load sharing, Motor ca-
bles
Relay
Earth
Line, Brake resistor, load sharing cables
Motor cables
Relay
Earth
MG.33.B7.02 - VLT is a registered Danfoss trademark
Furthermore the terminal screw must be retight-
ened after two days due to softness of the alumi-
nium. It is crucial to keep the connection a gas
tight joint, otherwise the aluminium surface will
oxidize again.
Tightening up torque
0.5-0.6 Nm
1.8 Nm
0.5-0.6 Nm
2-3 Nm
1.8 Nm
1.8 Nm
0.5-0.6 Nm
2-3 Nm