39
4.2.3 Main Circuit Cable Size and Tightening Torque
Select the cables and crimp terminals according to Table 4.2.2.
1. The recommended cable size is based on Normal Duty Mode using 75 °C 600 V vinyl-sheathed
cable with ambient temperature tolerance below 40 °C and wiring distance less than 100 m.
2. Terminal +1, +2, B1, B2 are only for connecting DC reactor and braking resistor options. Do not
connect other devices.
3. Consider the amount of voltage drop when selecting cable sizes. Increase the cable size when the
voltage drop exceeds 2% of the motor rated voltage. The amount of voltage drop can be calculated
using the following formula:
Line drop voltage (V) = 3 × cable resistance (Ω/km) × cable length (m) × current (A) × 10
-3
Table 4.2.2 Cable Size and Tightening Torque (Three-phase 400 V)
Tightening
Torque
Nm ( lb.in.)
Applicable
Cable Size
mm2
Suggested
Cable Size
AWG,
kcmil
Applicable
Cable Size
AWG,
kcmil
Applicable
Cable Size
mm2
DC-,DC+1,DC+2,B1,B2,
GND,R/L1,S/L2,T/L3,U/
T1,V/T2,W/T3,PE
DC-,DC+1,DC+2,B1,B2,
GND,R/L1,S/L2,T/L3,U/
T1,V/T2,W/T3,PE
DC-,DC+1,DC+2,B1,B2,
GND,R/L1,S/L2,T/L3,U/
T1,V/T2,W/T3,PE
DC-,DC+1,DC+2,B1,B2,
GND,R/L1,S/L2,T/L3,U/
T1,V/T2,W/T3,PE
R/L1,S/L2,T/L3,P,DC+,D
C-,U/T1,V/T2,W/T3
R/L1,S/L2,T/L3,P,DC+,D
C-,U/T1,V/T2,W/T3