Mitsubishi Electric FR-A820-04750-GF Instruction Manual page 64

Main circuit terminals
2.2
Main circuit terminals
 Cable gauge of main circuit terminals and earth (ground) terminals
Use an appropriate cable gauge to suppress the voltage drop to 2% or less.
If the wiring distance is long between the inverter and motor, the voltage drop in the main circuit will cause the motor torque to decrease especially at a low speed.
The following table indicates a selection example for the wiring length of 20 m.
• 200 V class (220 V input power supply, 150% overload current rating for 1 minute)
Terminal
Applicable inverter
screw
model
size
FR-A820-00046(0.4K) to
M4
00167(2.2K)
FR-A820-00250(3.7K) M4
FR-A820-00340(5.5K) M5(M4)
FR-A820-00490(7.5K) M5(M4)
FR-A820-00630(11K) M5
FR-A820-00770(15K) M6
FR-A820-00930(18.5K) M8(M6)
FR-A820-01250(22K) M8(M6)
FR-A820-01540(30K) M8(M6)
FR-A820-01870(37K) M10(M8)
FR-A820-02330(45K) M10(M8)
FR-A820-03160(55K) M12(M8)
FR-A820-03800(75K) M12(M8)
FR-A820-04750(90K) M12(M8)
• 400 V class (440 V input power supply, 150% overload current rating for 1 minute)
Terminal
Applicable inverter
screw
model
size
FR-A840-00023(0.4K) to
M4
00126(3.7K)
FR-A840-00170(5.5K) M4
FR-A840-00250(7.5K) M4
FR-A840-00310(11K) M5
FR-A840-00380(15K) M5
FR-A840-00470(18.5K) M6
FR-A840-00620(22K) M6
FR-A840-00770(30K) M6
FR-A840-00930(37K) M8
FR-A840-01160(45K) M8
FR-A840-01800(55K) M8
FR-A840-02160(75K) M10
FR-A840-02600(90K) M10
FR-A840-03250(110K) M10(M12)
FR-A840-03610(132K) M10(M12)
FR-A840-04320(160K) M12(M10)
FR-A840-04810(185K) M12(M10)
FR-A840-05470(220K) M12(M10)
FR-A840-06100(250K) M12(M10)
FR-A840-06830(280K) M12(M10)

For FR-A820-03160(55K) or lower and FR-A840-01800(55K) or lower, this cable gauge is with the continuous maximum permissible temperature of 75°C (HIV cable
(600 V class 2 vinyl-insulated cable), etc.). Assumes that the surrounding air temperature is 50°C or less and the wiring distance is 20 m or less.
For FR-A820-03800(75K) or higher and FR-A840-02160(75K) or higher, this cable gauge is with the continuous maximum permissible temperature of 90°C or higher
(LMFC (heat resistant flexible cross-linked polyethylene insulated cable), etc.). Assumes that the surrounding air temperature is 50°C or less and the wiring is in-
enclosure.

For all the 200 V class capacities and FR-A840-01160(45K) or lower, this cable gauge is with the continuous maximum permissible temperature of 75°C (THHW cable).
This is assumes a surrounding air temperature of 40°C or less and wiring distance of 20 m or less.
For FR-A840-01800(55K) or higher, this cable gauge is with continuous maximum permissible temperature of 90°C (THHN cable). This assumes a surrounding air
temperature of 40°C or lower and in-enclosure wiring.
(For the use in the United States or Canada, refer to

For FR-A820-00770(15K) or lower and FR-A840-01160(45K) or lower, the cable gauge is with the continuous maximum permissible temperature of 70°C (PVC cable).
This assumes a surrounding air temperature of 40°C or less and wiring distance of 20 m or less.
For FR-A820-00930(18.5K) or higher and FR-A840-01800(55K) or higher, this cable gauge is with continuous maximum permissible temperature of 90°C (XLPE cable).
This assumes a surrounding air temperature of 40°C and in-enclosure wiring.

The terminal screw size indicates the size of the terminal screw for R/L1, S/L2, T/L3, U, V, W, PR, PX, P/+, N/-, P1, P3, and the screw for earthing (grounding).
The screw size for PR and PX terminals of FR-A820-00340(5.5K) and FR-A820-00490(7.5K) is indicated in parentheses.
The screw size for earthing (grounding) of FR-A820-00930(18.5K) or higher is indicated in parentheses.
The screw size for P/+ terminal for connecting an option to FR-A840-03250(110K) or FR-A840-03610(132K) is indicated in parentheses.
The screw size for earthing (grounding) of FR-A840-04320(160K) or higher is indicated in parenthesis.
The line voltage drop can be calculated by the following formula:
Line voltage drop [V] = wire resistance [mΩ/m]
×
Use a larger diameter cable when the wiring distance is long or when it is desired to decrease the voltage drop (torque reduction) in the low speed range.
6
WIRING
Crimp terminal
Tightening
R/L1,
torque N•m

S/L2, U, V, W
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 22-8
7.8 38-8 38-8
7.8 60-8 60-8
26.5 80-10 60-10
26.5 100-10 100-10
46 100-12 100-12
46 150-12 150-12
46 150-12 150-12
Crimp terminal
Tightening
R/L1,
torque N•m

S/L2, U, V, W
T/L3
1.5 2-4 2-4
1.5 2-4 2-4
1.5 5.5-4 5.5-4
2.5 5.5-5 5.5-5
2.5 8-5 5.5-5
4.4 14-6 8-6
4.4 14-6 14-6
4.4 22-6 22-6
7.8 22-8 22-8
7.8 38-8 38-8
7.8 60-8 60-8
26.5 60-10 60-10
26.5 60-10 60-10
26.5 80-10 80-10
26.5 100-10 100-10
46 150-12 150-12
46 150-12 150-12
46 100-12 100-12
46 100-12 100-12
46 150-12 150-12
page
wiring distance [m]
×
2
HIV cables, etc. (mm )

R/L1, Earthing
P/+,
S/L2, U, V, W (grounding)
P1
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 5.5
14 14 14 8
22 22 22 14
38 22 38 14
38 38 38 22
60 60 60 22
80 60 80 22
100 100 100 38
100 100 100 38
125 125 125 38
150 150 150 38
2
HIV cables, etc. (mm )

R/L1, Earthing
P/+,
S/L2, U, V, W (grounding)
P1
T/L3 cable
2 2 2 2
2 2 3.5 3.5
3.5 3.5 3.5 3.5
5.5 5.5 5.5 5.5
8 5.5 8 5.5
14 8 14 8
14 14 22 14
22 22 22 14
22 22 22 14
38 38 38 22
60 60 60 22
60 60 60 22
60 60 80 22
80 80 80 22
100 100 100 38
125 125 150 38
150 150 150 38
2×100 2×100 2×100 60
2×100 2×100 2×125 60
2×125 2×125 2×125 60
23.)
current [A] / 1000
×
Cable gauge
AWG/MCM
PVC cables, etc. (mm

R/L1, R/L1,
S/L2, U, V, W S/L2, U, V, W
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 4 35 25
2 2 35 35
1/0 1/0 50 50
3/0 1/0 70 70
4/0 4/0 95 95
4/0 4/0 95 95
250 250 120 120
300 300 150 150
Cable gauge
AWG/MCM
PVC cables, etc. (mm

R/L1, R/L1,
S/L2, U, V, W S/L2, U, V, W
T/L3 T/L3
14 14 2.5 2.5
12 14 2.5 2.5
12 12 4 4
10 10 6 6
8 10 10 6
6 8 16 10
6 6 16 16
4 4 25 25
4 4 25 25
1 2 50 50
1/0 1/0 50 50
1/0 1/0 50 50
3/0 3/0 50 50
3/0 3/0 70 70
4/0 4/0 95 95
250 250 120 120
300 300 150 150
2×4/0 2×4/0 2×95 2×95
2×4/0 2×4/0 2×95 2×95
2×250 2×250 2×120 2×120
2
)

Earthing
(grounding)
cable
2.5
4
6
16
16
16
25
25
25
35
50
50
―
―
2
)

Earthing
(grounding)
cable
2.5
4
4
10
10
16
16
16
16
25
25
25
25
35
50
70
95
95
95
120