3. Electrical Installation
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Main Circuit Cable Protection
Add heat shrink tube to cable lug cooper tube and cable core part of main circuit cable
and ensure the heat shrink tube completely covers the cable conductor part, as shown in
the following gure.
Copper tube
bottom of cable lug
50-8
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Power Input Protection
● Install protection devices (a fuse and a MCCB) at power input to the drive. The
protection devices must provide protection on overcurrent and short-circuit, and be
able to completely isolate the drive from the electrical power input.
● Cables and protection device on power input must be suitably rated for the power and
voltage class of the drive under normal conditions, and under possible fault conditions
such as system overload and short-circuit on the power input.
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Power Grid System
● The drive is applicable to system with neutral point grounded.
If the drive is used in an IT power system with an ungrounded power
system or a high resistance grounded [over 30 ohms] power system, it
is necessary to remove both VDR and EMC jumper screws as shown
in Figure 3-11. Do not install a lter. Failure to comply may result in
personal injury or damage to the drive.
● If a residual-current device (RCD) is used and it trips at start, remove the EMC jumper
screw as shown in Figure 3-11.
Figure 3-7 EMC jumper screw and VDR jumper screw
VDR jumper screw
EMC jumper screw
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