VFD68 Variable Frequency Drives (230 or 460 VAC)
14
High-Voltage Wire Size and Maximum Wire Length
Use UL Listed copper, stranded wire with insulation rated at 75°C (167°F) for wiring the high-voltage supply to
the drive (R/L1, S/L2, T/L3) and wiring the high-voltage drive output (U, V, W) to the motor.
Selecting the Correct VFD68 Drive for a Fan Motor
1.
Determine the maximum current consumption from the motor ratings label.
2.
Select the appropriate table for your motor:
•
For 230 VAC motors, see Table 11.
•
For 460 VAC motors, see Table 12.
3.
In the table you just selected, find the maximum output current that just exceeds the motor’s maximum
current consumption and use the VFD68 part number associated with this maximum output current as the
recommended drive for the motor.
4.
Use the same table to determine the recommended cable wiring size for the output current rating.
IMPORTANT:
Use copper conductors only. Make all wiring in accordance with local, national, and regional
regulations.
Table 11: 230 VAC, VFD68Bxx Drives, Maximum Output Amperes and Wiring Sizes
Part
Number
Rated
Capacity,
kW
(HP)
Maximum
Output
Current
(Amperes)
Cable Wire Size
AWG
1
1.
The recommended cable wire size is that of the cable (THHW cable) with a continuous maximum permissible
temperature of 75°C (167°F). Assumes that the surrounding air temperature is 40°C (104°F) or less. (Selection
example for use mainly in the United States.)
PVC wires, (mm
2
)
2
2.
The recommended cable wire size is that of the cable (PVC cable) with a continuous maximum permissible
temperature of 70°C (158°F). Assumes that the surrounding air temperature is 40°C (104°F) or less. (Selection
example for use mainly in Europe.)
R/L1, S/L2,
T/L3
U, V, W
R/L1, S/L2,
T/L3
U, V, W
Earthing
(Ground) cable
VFD68BBB
0.1 (1/8)
0.8
14
14
2.5
2.5
2.5
VFD68BCB
0.2 (1/4)
1.4
14
14
2.5
2.5
2.5
VFD68BDC
0.4 (1/2)
2.5
14
14
2.5
2.5
2.5
VFD68BFD
0.75 (1)
4.2
14
14
2.5
2.5
2.5
VFD68BGG
1.5 (2)
7.0
14
14
2.5
2.5
2.5
VFD68BHG
2.2 (3)
10.0
14
14
2.5
2.5
2.5
VFD68BJK
3.7 (5)
16.5
12
12
4
4
4
VFD68BKL
5.5 (7-1/2)
23.8
10
10
6
6
6
VFD68BLL
7.5 (10)
31.8
6
8
16
10
6
VFD68BMP
11 (15)
45.0
6
6
16
16
16
VFD68BNP
15 (20)
58.0
4
4
25
25
16
