ELECTRICAL CABLING AND CONNECTIONS
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6
6.1.3
Cable installation instructions
1
Before starting the installation, check that none of the components of the fre-
quency converter is live.
2
Vacon NX Liquid-Cooled drive must always be installed in an enclosure, a
separate cubicle or an electrical room.
Always use a jib crane or similar lifting device to lift the drive. For safe and ap-
propriate lifting, see chapter 5.1.1.
3
Place the motor cables far enough from other cables:
Avoid placing the motor cables in long parallel lines with other cables
If the motor cables run in parallel with other cables, note the minimum
distances between the motor cables and other cables given in table be-
low.
The given distances also apply between the motor cables and signal ca-
bles of other systems.
Distance between
parallelly running
cables [m]
Shielded cable [m]
0.3 <50
1.0 <200
The maximum length of the motor cables is 300 m.
The motor cables should cross other cables at an angle of 90 degrees.
4
If cable insulation checks are needed, see Chapter 6.1.9.
5
Connect the cables/busbars:
For chassis CH5 and greater, an external flexible cable connection block
must be used at both mains and motor ends if stiff cable type (EMCMK,
MCMK) is used. See chapter 6.1.1.
Strip the cables at a sufficient distance if needed
Connect the mains, motor and control cables to their respective ter-
minals (see chapter 5.1.2). If busbar connection is used, bolt the bars
and the terminals together. See bolt sizes on pages 29 to 37.
Take the maximum terminal stresses shown in Figure 6-2 into account
For information on cable installation according to UL regulations see
Chapter 6.1.8.
Make sure that the control cable wires do not come in contact with the
electronic components of the unit.
If an external brake resistor (option) is used, connect its cable to the
appropriate terminal (CH3 only).
Check the connection of the earth cable to the motor and the frequency
converter terminals marked with
.
Connect the separate shield of the power cable to the earth terminals
of the frequency converter, motor and the supply centre.
6
For chassis CH74: Clamp the motor cables to the cabinet frame as instructed
in Figure 6-1.