IMO HD2-3.7A-43 - 4.5 Wiring protection; 4.5.1 Protect the inverter and input power cable in short-circuit; 4.5.2 Protect the motor and motor cable in short circuit; 4.5.3 Protect motor and prevent thermal overload

HD2 Series Inverter Installation Guidelines
-21-
4.3 Standard wiring of main circuit
4.3.1 Wiring diagram of main circuit for a single inverter
37kW and lower
45–110kW (inclusive)
132kW and higher
Braking resistor
Braking unit
Braking resistor
Braking resistor
Braking unit
Input
reactor
Input
filter
Fuse
Input
reactor
Input
filter
3-phase
power
380V(-15%)
~
440V(+10%)
50/60Hz
3-phase
power
380V(-15%)
~
440V(+10%)
50/60Hz
R
S
T
R
S
T
U
V
W
PE
U
V
W
PE
Output
reactor
Output
filter
M
（+）
（-）
P1
（+） （-）
PB
3-phase
power
380V(-15%)
~
440V(+10%)
50/60Hz
Fuse
Fuse
R
S
T
U
V
W
PE
Output
reactor
Output
filter
M
M
（+）
（-）
DC+
DC-
DC+
DC-
DC reactor
Output
reactor
Output
filter
Input
reactor
Input
filter
Figure 4-7 Main circuit wiring diagram for AC 3PH 380V (-15%)–440V (+10%)
Note:
⚫ The fuse, DC reactor, braking unit, braking resistor, input reactor, input filter, output reactor and
output filter are optional parts. See Appendix D Optional Peripheral Accessories.
⚫ P1 and (+) have been short connected by default for the 380V 132kW and higher inverter models.
If you need to connect to an external DC reactor, take off the short-contact tag of P1 and (+).
⚫ When connecting the braking resistor, take off the yellow warning sign marked with PB, (+) and (-)
on the terminal block before connecting the braking resistor wire; otherwise, poor contact may
occur.
⚫ Built-in braking unit is optional for the 380V 45kW–110kW inverter models.