6
vacon • 88
Electrical cabling and connections
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
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 below.
• The given distances also apply between the motor cables and signal cables of
other systems.
• 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 6.1.10.
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 terminals (see
Chapter 5.1.2). If busbar connection is used, bolt the bars and the terminals
together. See bolt sizes on page 33 to page 44.
• Take the maximum terminal stresses shown in Figure 37 into account.
• For information on cable installation according to UL regulations see
Chapter 6.1.9.
• 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.
• Check the connection of the earth cable to the motor and the AC driveterminals
marked with
.
• Connect the separate shield of the power cable to the earth terminals of the AC
drive, motor and the supply centre.
6
Clamp the motor cables to the cabinet frame as instructed in Figure 36.
7
Liquid cooling connection:
The standard delivery of the VACON
®
NX Liquid-Cooled drive includes hoses on
the cooling element 1.5 m in length and 15 mm in diameter. The hoses are
inserted in 1400-mm UL94V0 approved conduits. Connect the line hose branch to
its counterpart (screw or fast connector) on the of the VACON
®
Liquid-Cooled
drive.
Due to high pressure in the line hose, it is recommended to equip the liquid line
with a shut-off valve, which makes the connection easier. In order to prevent
water from spraying in the installation room we also recommend to wrap e.g.
linters around the connection on installing. For more information on the liquid
connection, see Chapter 5.2.2.
When the installation in the enclosure is completed the liquid pump can be
started. See Commissioning of the AC drive on page 137.
NOTE!
Do not switch on the power before ensuring the proper functioning of the
liquid cooling system.
Distance between
parallelly running
cables [m]
Shielded cable [m]
0.3
≤
50
1.0
≤
200
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