User manual

installation vacon • 43
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3
3.2.6 General cabling rules
1
Before starting the installation, check that none of the components of the fre-
quency converter is live.
2
Place the motor cables sufficiently far from other cables:
• Avoid placing the motor cables in long parallel lines with other cables.
• If the motor cable runs in parallel with other cables, the minimum distance
between the motor cable and other cables is 0.3 m.
• The given distance also applies between the motor cables and signal cables
of other systems.
• The maximum length of the motor cables for MI1-3 is 30 m. For MI4 & 5,
maximum length is 50 m, if use longer cable, current accuracy will be
decreased.
• The motor cables should cross other cables at an angle of 90 degrees.
3
If cable insulation checks are needed, see Chapter 3.2.9.
4
Connecting the cables:
• Strip the motor and mains cables as advised in Figure 3.31.
• Connect the mains, motor and control cables into their respective termi-
nals, see Figures 3.17 - 3.26.
• Note the tightening torques of power cables and control cables given in
chapter 3.2.1 and 3.2.2.
• For information on cable installation according to UL regulations see Chap-
ter 3.2.8 .
• Make sure that the control cable wires do not come in contact with the elec-
tronic components of the unit.
• If an external brake resistor (option) is used, connect its cable to the appro-
priate terminal.
• Check the connection of the earth cable to the motor and the frequency
converter terminals marked with
• Connect the separate shield of the motor cable to the earth plate of the
frequency converter, motor and the supply centre.