Mitsubishi Electric FR-A800 Installation Manuallines page 27

*1
For the FR-A840-01800(55K) or lower and the FR-A846 (IP55 compatible) models, the recommended cable size is that of the HIV
cable (600V class 2 vinyl-insulated cable) with continuous maximum permissible temperature of 75°C. Assumes that the surrounding
air temperature is 50°C or less and the wiring distance is 20m or less.
For the FR-A840-02160(75K) or higher, the recommended cable size is that of the LMFC cable (heat resistant flexible cross-linked
polyethylene insulated cable) with continuous maximum permissible temperature of 90°C. Assumes that the surrounding air
temperature is 50°C or less and wiring is performed in an enclosure.
*2
For the FR-A840-01160(45K) or lower and the FR-A846 (IP55 compatible) models, the recommended cable size is that of the THHW
cable with continuous maximum permissible temperature of 75°C. Assumes that the surrounding air temperature is 40°C or less and
the wiring distance is 20m or less.
For the FR-A840-01800(55K) or higher, the recommended cable size is that of THHN cable with continuous maximum permissible
temperature of 90°C. Assumes that the surrounding air temperature is 40°C or less and wiring is performed in an enclosure.
(Selection example for use mainly in the United States.)
*3
For the FR-A840-01160(45K) or lower and the FR-A846 (IP55 compatible) models, the recommended cable size is that of the PVC
cable with continuous maximum permissible temperature of 70°C. Assumes that the surrounding air temperature is 40°C or less and
the wiring distance is 20m or less.
For the FR-A840-01800(55K) or higher, the recommended cable size is that of XLPE cable with continuous maximum permissible
temperature of 90°C. Assumes that the surrounding air 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 for the FR-A840 models indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, PR, PX, P/+, N/–, P1, P3,
and a screw for earthing.
The terminal screw size for the FR-A846 (IP55 compatible) models indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, P/+, N/–,
P1 and a screw for earthing.
The screw size for P/+ terminal for connecting an option to FR-A840-03250(110K) or FR-A840-03610(132K) is indicated in brackets.
The screw size for earthing (grounding) of FR-A840-04320(160K) or higher is indicated in brackets.
400V class, FR-A842 (when input power supply is 440V based on the rated current for 150% overload for 1 minute)
(For the applicable cables of the converter unit (FR-CC2) refer to the FR-CC2 Instruction Manual.)
Applicable
Terminal Screw
Inverter Type
4
Size *
FR-A842-
07700(315K) M12 (M10)
08660(355K) M12 (M10)
09620(400K) M12 (M10)
10940(450K) M12 (M10)
12120(500K) M12 (M10)
*1
The recommended cable size is that of the LMFC cable (heat resistant flexible cross-linked polyethylene insulated cable) with
continuous maximum permissible temperature of 90°C. Assumes that the surrounding air temperature is 40°C or less and wiring is
performed in an enclosure.
*2
The recommended cable size is that of THHN cable with continuous maximum permissible temperature of 90°C. Assumes that the
surrounding air temperature is 40°C or less and wiring is performed in an enclosure.
(Selection example for use mainly in the United States.)
*3
The recommended cable size is that of XLPE cable with continuous maximum permissible temperature of 90°C. Assumes that the
surrounding air 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, P/+, N/– and a screw for earthing.
The screw size for earthing (grounding) is indicated in brackets
The line voltage drop can be calculated by the following expression:
√3 × wire resistance [mΩ/m] × wiring distance [m] x current [A]
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.
CAUTION
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 sleeve to wire the power supply and motor.
Crimping
Terminal
Tightening
Torque [Nm]
U, V, W
46 150-12
46 C2-200
46 C2-200
46 C2-250
46 C2-250
1000
Cable Sizes
2 1
HIV, etc. [mm ] *
Earth
U, V, W P/+, N/– Cable
Gauge
2×150 2×150 100
2×200 2×200 100
2×200 2×200 100
2×250 2×250 100
2×250 3×200 2×100
WIRING
AWG/MCM
PVC, etc. [mm
2
*
Earth
U, V, W U, V, W Cable
Gauge
2×300 2×150 150
2×350 2×185 2×95
2×400 2×185 2×95
2×500 2×240 2×120
2×500 2×240 2×120
2 3
] *
21