Applicable Cables And Wiring Length - Mitsubishi Electric A800 Plus Instruction Manual

Main circuit terminals
2.5.4

Applicable cables and 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 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 (440 V input power supply, ND rating).
• Converter unit (FR-CC2)
Converter Terminal
model screw
FR-CC2-H[ ] Size
∗4
315K M12 (M10)
355K M12 (M10)
400K M12 (M10)
450K M12 (M10)
500K M12 (M10)
• Inverter
Inverter Terminal Tightening
model screw
FR-A842-[ ] size
∗4
07700(315K) M12 (M10) 46
08660(355K) M12 (M10) 46
09620(400K) M12 (M10) 46
10940(450K) M12 (M10) 46
12120(500K) M12 (M10) 46
∗1
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 40°C or lower and in-enclosure wiring.
∗2 The recommended cable size is that of the cable (THHN cable) with continuous maximum permissible temperature of 90°C. It 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
∗3 The cable size is that of the cable (XLPE cable) with continuous maximum permissible temperature of 90°C. It assumes a surrounding air
temperature of 40°C or lower and in-enclosure wiring.
(Selection example for use mainly in Europe.
∗4 The terminal screw size indicates the size of a terminal screw for R/L1, S/L2, T/L3, U, V, W, P/+, N/-, and a screw for earthing (grounding).
Screw size for earthing (grounding) is indicated in parentheses.
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 crimp terminals with insulation sleeves to wire the power supply and motor.
38
INSTALLATION AND WIRING
Crimp
terminal
Tightening
Torque
R/L1,
N·m
S/L2,
T/L3
46 150-12
46 C2-200
46 C2-200
46 C2-250
46 C2-200
Crimp
terminal
Torque
N·m
U, V, W U, V, W
150-12 2×150
C2-200 2×200
C2-200 2×200
C2-250 2×250
C2-250 2×250
× wire resistance[mΩ/m] × wiring distance[m] × current[A]
1000
HIV cables, etc. (mm
R/L1, Earthing
S/L2, P/+, N/- (grounding)
T/L3 cable
2×150 2×150 100
2×200 2×200 100
2×200 2×200 100
2×250 2×250 100
3×200 3×200 2×100
2
HIV cables, etc. (mm )
∗1
Earthing
P/+, N/- (grounding)
cable
2×150 100
2×200 100
2×200 100
2×250 100
3×200 2×100
page 120.)
Cable gauge
PVC cables, etc.
AWG/MCM
2
)
∗1
∗2
R/L1, R/L1,
S/L2, S/L2,
T/L3 T/L3
2×300 2×150
2×350 2×185
2×400 2×185
2×500 2×240
2×500 2×240
Cable gauge
PVC cables, etc.
AWG/MCM
∗2
U, V, W U, V, W
2×300 2×150
2×350 2×185
2×400 2×185
2×500 2×240
2×500 2×240
2
(mm )
∗3
Earthing
(grounding)
cable
150
2×95
2×95
2×120
2×120
2
(mm )
∗3
Earthing
(grounding)
cable
150
2×95
2×95
2×120
2×120