Cables And Wiring Length - Mitsubishi Electric FR-A720-0.4K Instruction Manual

Main circuit terminal specifications
2.2.3

Cables and wiring length

(1) Applied cable size
Select the recommended cable size to ensure that a voltage drop will be 2% max.
If the wiring distance is long between the inverter and motor, a main circuit cable voltage drop will cause the motor
torque to decrease especially at the output of a low frequency.
The following table indicates a selection example for the wiring length of 20m.
200V class (when input power supply is 220V)
Terminal
Applicable Inverter
Screw
Type
Size
FR-A720-0.4K to
M4
2.2K
FR-A720-3.7K M4
FR-A720-5.5K M4-M5
FR-A720-7.5K M4-M5
FR-A720-11K M5
FR-A720-15K M6
FR-A720-18.5K M8-M6
FR-A720-22K M8-M6
FR-A720-30K M8-M6
FR-A720-37K M10-M8
FR-A720-45K M10-M8
FR-A720-55K M12-M8
FR-A720-75K M12-M10
FR-A720-90K M12-M10
*1 For the 55K or less, the cable size is that of the cable (HIV cable (600V class 2 vinyl-insulated cable) etc.) with continuous maximum permissible
temperature of 75°C. Assumes that the ambient temperature is 50°C or less and the wiring distance is 20m or less.
For the 75K or more, the recommended cable size is that of the cable (LMFC (heat resistant flexible cross-linked polyethylene insulated cable)
etc.) with continuous maximum permissible temperature of 90°C. Assumes that the ambient temperature is 50°C or less and wiring is performed
in an enclosure.
*2 The recommended cable size is that of the cable (THHW cable) with continuous maximum permissible temperature of 75°C. Assumes that the
ambient temperature is 40°C or less and the wiring distance is 20m or less.
(Selection example for use mainly in the United States.)
*3 For the 15K or less, the recommended cable size is that of the cable (PVC cable) with continuous maximum permissible temperature of 70°C.
Assumes that the ambient temperature is 40°C or less and the wiring distance is 20m or less.
For the 18.5K or more, the recommended cable size is that of the cable (XLPE cable) with continuous maximum permissible temperature of 90°C.
Assumes that the ambient temperature is 40°C or less and wiring is performed in an enclosure.
(Selection example for use mainly in Europe.)
*4 The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, and a screw for earthing (grounding). For the 5.5K and 7.5K,
screw sizes are different (R1/L11, S1/L21, PR, PX - R/L1, S/L2, T/L3, U, V, W, a screw for earthing (grounding)). For the 18.5K or more, screw
sizes are different. (R/L1, S/L2, T/L3, U, V, W - a screw for earthing (grounding))
22
Crimping
Terminal
Tightening
Torque
R/L1,
N·m
*4
U, V, W
S/L2,
T/L3
1.5 2-4 2-4
1.5 5.5-4 5.5-4
2.5 5.5-5 5.5-5
2.5 14-5 8-5
2.5 14-5 14-5
4.4 22-6 22-6
7.8 38-8 38-8
7.8 38-8 38-8
7.8 60-8 60-8
14.7 80-10 80-10
14.7 100-10 100-10
24.5 100-12 100-12
24.5 150-12 150-12
24.5 150-12 150-12
Cable Sizes
2
HIV, etc. (mm )
*1
Earth
R/L1,
U, V, W P/+, P1 (Ground)
S/L2,
T/L3
cable
2 2 2 2
3.5 3.5 3.5 3.5
5.5 5.5 5.5 5.5
14 8 14 14
14 14 14 14
22 22 22 14
38 38 38 22
38 38 38 22
60 60 60 38
80 80 80 38
100 100 100 60
100 100 100 60
125 125 125 38
150 150 150 60
AWG/MCM
PVC, etc. (mm
*2
R/L1, R/L1,
U, V, W U, V, W
S/L2, S/L2,
T/L3 T/L3
14 14 2.5 2.5
12 12 4 4
10 10 6 6
6 8 16 10
6 6 16 16
4 4 25 25
2 2 35 35
2 2 35 35
1/0 1/0 50 50
3/0 3/0 70 70
4/0 4/0 95 95
4/0 4/0 95 95
 
250 250
 
300 300
2
)
*3
Earth
(Ground)
cable
2.5
4
6
16
16
16
25
25
25
35
50
50

