Main circuit terminals
29
2
2.5.4
Applicable cables and the wiring length
Select a recommended cable size to ensure that the voltage drop will be 2% or less.
If the wiring distance is long between the inverter and motor, the voltage drop in the main circuit wires 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.
• 400 V class (440 V input power supply (with 150% rated current for one minute))
For the FR-A846-01800(55K) or lower, it is the gauge of a cable with the continuous maximum permissible temperature of 75°C (HIV cable (600
V grade heat-resistant PVC insulated wire), etc.). It assumes a surrounding air temperature of 50°C or lower and the wiring distance of 20 m or
shorter.
For the FR-A846-02160(75K) or higher, it is the gauge of the cable with the continuous maximum permissible temperature of 90°C or higher.
(LMFC (heat resistant flexible cross-linked polyethylene insulated cable), etc.). It assumes a surrounding air temperature of 50°C or lower.
For the FR-A846-01160(45K) or lower, it is the gauge of a cable with the continuous maximum permissible temperature of 75°C (THHW cable).
It assumes a surrounding air temperature of 40°C or lower and the wiring distance of 20 m or shorter.
For the FR-A846-01800(55K) or higher, it is the gauge of a cable with the continuous maximum permissible temperature of 90°C (THHN cable).
It assumes a surrounding air temperature of 40°C or lower. (Selection example for use mainly in the United States.)
For the FR-A846-01160(45K) or lower, it is the gauge of a cable with the continuous maximum permissible temperature of 70°C (PVC cable). It
assumes a surrounding air temperature of 40°C or lower and the wiring distance of 20 m or shorter.
For the FR-A846-01800(55K) or higher, it is the gauge of a cable with the continuous maximum permissible temperature of 90°C (XLPE cable).
It assumes a surrounding air temperature of 40°C or lower. (Selection example for use mainly in Europe.)
The terminal screw size indicates the size of terminal screw for R/L1, S/L2, T/L3, U, V, W, P/+, N/-, P1, and a screw for earthing (grounding).
The line voltage drop can be calculated by the following formula:
Line voltage drop [V]=
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.
NOTE
• Tighten the terminal screw to the specified torque.
A screw that has been tightened too loosely can cause a short circuit or malfunction.
A screw that has been tightened too tightly can cause a short circuit or malfunction due to the unit breakage.
• Use crimping terminals with insulation sleeves to wire the power supply and motor.
Applicable
inverter
model
FR-A846-[ ]
Terminal
screw
Tightening
torque
N
·
m
Crimping
terminal
Cable gauge
HIV cables, etc. (mm
2
)
AWG/MCM
PVC cables, etc. (mm
2
R/L1,
S/L2,
T/L3
U, V,
W
R/L1,
S/L2,
T/L3
U, V,
W
P/+
Earthing
(grounding)
cable
R/L1,
S/L2,
T/L3
U, V,
W
R/L1,
S/L2,
T/L3
U, V,
W
Earthing
(grounding)
cable
00023(0.4K) to
00126(3.7K)
M4
1.5
2-4
2-4
2
2
2
2
14
14
2.5
2.5
2.5
00170(5.5K)
M4
1.5
2-4
2-4
2
2
3.5
3.5
12
14
2.5
2.5
4
00250(7.5K)
M6
4.4
5.5-6
5.5-6
3.5
3.5
3.5
3.5
12
12
4
4
4
00310(11K)
M6
4.4
5.5-6
5.5-6
5.5
5.5
5.5
5.5
10
10
6
6
10
00380(15K)
M6
4.4
5.5-6
5.5-6
5.5
5.5
8
5.5
10
10
6
6
10
00470(18.5K) M6
4.4
8-6
8-6
8
8
14
8
8
8
10
10
16
00620(22K)
M6
4.4
14-6
14-6
14
14
22
14
6
6
16
16
16
00770(30K)
M6
4.4
22-6
22-6
22
22
22
14
4
4
25
25
16
00930(37K)
M8
7.8
22-8
22-8
22
22
22
14
4
4
25
25
16
01160(45K)
M8
7.8
38-8
38-8
38
38
38
22
2
2
50
50
25
01800(55K)
M10
14.7
60-10 60-10 60
60
60
22
1/0
1/0
50
50
25
02160(75K)
M10
14.7
60-10 60-10 60
60
60
22
1/0
1/0
50
50
25
02600(90K)
M10
14.7
60-10 60-10 60
60
80
22
3/0
3/0
50
50
25
03250(110K)
M10
14.7
80-10 80-10 80
80
80
38
3/0
3/0
70
70
35
03610(132K)
M10
14.7
100-10 100-10 100
100
100
38
4/0
4/0
95
95
50
× wire resistance[mΩ/m] × wiring distance[m] × current[A]
1000
Содержание FR-A846-00023
Страница 69: ...MEMO 68...
Страница 87: ...MEMO 86...
Страница 129: ...MEMO 128...
Страница 154: ...MEMO 153...
