Specifications

8
WIRING
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, a 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)
! 400 V class (440 V input power supply, 150% overload current rating for 1 minute)
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 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[m /m] × wiring distance[m] × current[A] / 1000
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.
ÒÑÌÛ
! 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
Terminal
screw
Size
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/+,
P1
Earthing
(grounding)
cable
R/L1,
S/L2,
T/L3
U, V, W
R/L1,
S/L2,
T/L3
U, V, W
Earthing
(grounding)
cable
FR-A820-00046(0.4K) to
00167(2.2K)
M41.52-42-4222214142.52.52.5
FR-A820-00250(3.7K)M41.55.5-45.5-43.53.53.53.51212444
FR-A820-00340(5.5K)M5(M4)2.55.5-55.5-55.55.55.55.51010666
FR-A820-00490(7.5K)M5(M4)2.514-58-5148145.568161016
FR-A820-00630(11K)M52.514-514-5141414866161616
FR-A820-00770(15K)M64.422-622-62222221444252516
FR-A820-00930(18.5K)M8(M6)7.838-838-83838381422353525
FR-A820-01250(22K)M8(M6)7.838-838-83838382222353525
FR-A820-01540(30K)M8(M6)7.860-860-8606060221/01/0505025
FR-A820-01870(37K)M10(M8)14.780-1080-10808080223/03/0707035
FR-A820-02330(45K)M10(M8)14.7100-10100-10100100100384/04/0959550
FR-A820-03160(55K)M12(M8)24.5100-12100-12100100100384/04/0959550
FR-A820-03800(75K)M12(M8)24.5150-12150-1212512512538250250
FR-A820-04750(90K)M12(M8)24.5150-12150-1215015015038300300
Applicable inverter
model
Terminal
screw
Size
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/+,
P1
Earthing
(grounding)
cable
R/L1,
S/L2,
T/L3
U, V, W
R/L1,
S/L2,
T/L3
U, V, W
Earthing
(grounding)
cable
FR-A840-00023(0.4K) to
00126(3.7K)
M41.52-42-4222214142.52.52.5
FR-A840-00170(5.5K)M41.52-42-4223.53.512142.52.54
FR-A840-00250(7.5K)M41.55.5-45.5-43.53.53.53.51212444
FR-A840-00310(11K)M52.55.5-55.5-55.55.55.55.510106610
FR-A840-00380(15K)M52.58-58-58885.588101010
FR-A840-00470(18.5K)M64.414-68-614814868161016
FR-A840-00620(22K)M64.414-614-61414221466161616
FR-A840-00770(30K)M64.422-622-62222221444252516
FR-A840-00930(37K)M87.822-822-82222221444252516
FR-A840-01160(45K)M87.838-838-83838382212505025
FR-A840-01800(55K)M87.860-860-8606060221/01/0505025
FR-A840-02160(75K)M1014.760-1060-10606060221/01/0505025
FR-A840-02600(90K)M1014.760-1060-10606080223/03/0505025
FR-A840-03250(110K)M10(M12)14.780-1080-10808080223/03/0707035
FR-A840-03610(132K)M10(M12)14.7100-10100-10100100100384/04/0959550
FR-A840-04320(160K)M12(M10)24.5150-12150-121251501503825025012012070
FR-A840-04810(185K)M12(M10)24.5150-12150-121501501503830030015015095
FR-A840-05470(220K)M12(M10)46100-12100-122×1002×1002×100602×4/02×4/02×952×9595
FR-A840-06100(250K)M12(M10)46100-12100-122×1002×1002×125602×4/02×4/02×952×9595
FR-A840-06830(280K)M12(M10)46150-12150-122×1252×1252×125602×2502×2502×1202×120120