FC 300 Operating Instructions
How to Install
" Electrical Installation
NB!:
Cables General
All cabling must comply with national and local regulations on cable cross-sections and
ambient temperature. Copper (60/75°C) conductors recom me n ded.
Aluminium C onductors
Aluminium conductors are not recommended.
Terminals can accept aluminium co nductors but th e
conductor surface has to be clean and the oxidation
must be removed and sealed by neutal 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 Cable for: Tightening up torque
0.25-7.5 kW (A1, A2,
A3 and A5)
Line, Brake resistor, load sharing, Motor
cables
0.5-0.6 Nm
Line, Brake resistor, load sharing, Motor
cables
1.8 Nm
Relay 0.5-0.6 Nm
11-15 kW (B1)
Earth 2-3 Nm
Line, Brake resistor, loa d sharing cables 1.8 Nm
Motor cables 1.8 Nm
Relay 0.5-0.6 Nm
18.5-22 kW (B2)
Earth 2-3 Nm
" Removal o f
Knockouts for Extra Cables
1. Remove cable entry from the frequency converter (Avoiding foreign parts falling into
the frequency converter when removing knockouts)
2. Cable e
ntry has to be supported around the k nockout 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 Cabl
e entry on frequency converter.
17
MG.33.A7.02 - VLT is a registered Danfoss trademark
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