2 Installation and Wiring
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2.3 Power Grid System Requirement
The AC drive is applicable to power grid systems with neutral points grounded. If the
AC drive is used in an IT power system, screw 1 shown in the following figure must be
screwed out to remove the jumper of the VDR. Failure to comply may result in personal
injury or damage to the AC drive.
&.$
KVNQFSTDSFX
7%3
KVNQFSTDSFX
ʍ
ʎ
Figure 2-12
VDR and EMC grounding jumper positions
2.4 Wiring Recommendations
2.4.1 Main Power Cables
Connect main power cables as shown below. Air end input/output cables and cooling
blower cables must be grounded separately.
Input PE
terminal
Mains frequency
cooling blower
output terminal
(U3, V3, and W3)
Input wiring terminal
(R, S, and T)
Air end output wiring
terminal (U1, V1, and W1)
Variable frequency
cooling blower
terminal
(U2, V2, and W2)
Cooling blower
output PE terminal
Air end output
PE terminal
Elliptic rubber
line O-ring
MAINS FREQUENCY
COOLING BLOWER
U3
V3
W3
R
S
T
POWER
U1
V1
W1
AIR END
VARIABLE FREQUENCY
COOLING BLOWER
U2
V2
W2
Figure 2-13
Wiring diagram of main power cables
