Selecting the Correct VFD68 Drive for a Fan Motor - PENN Controls - VFD68Bxx - VFD68Cxx - Three‐Phase Motor Speed Controller - VFD68 Three‐Phase Variable Frequency Drive

Procedure

Determine the maximum current consumption from the motor ratings label.
Select the appropriate table for your motor:
- For 230 VAC motors, see Table 1.
- For 460 VAC motors, see Table 2.
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.

Use the same table to determine the recommended cable wiring size for the output current rating.

Table 1. 230 VAC, VFD68Bxx Drives, Maximum Output Amperes and Wiring Sizes
Part Number	Rated Capacity, kW (HP)	Maximum Output Current (Amperes)	Cable Wire Size
			AWG¹		PVC wires, (mm²)²
			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

Table 2. 460 VAC, VFD68Cxx Drives, Maximum Output Amperes and Wiring Sizes
Part Number	Rated Capacity, kW (HP)	Maximum Output Current (Amperes)	Cable Wire Size
			AWG³		PVC wires, (mm²)⁴
			R/L1, S/L2, T/L3	U, V, W	R/L1, S/L2, T/L3	U, V, W	Earthing (Ground) cable
VFD68CDF	0.4 (1/2)	1.2	14	14	2.5	2.5	2.5
VFD68CFF	0.75 (1)	2.2	14	14	2.5	2.5	2.5
VFD68CGG	1.5 (2)	3.6	14	14	2.5	2.5	2.5
VFD68CHH	2.2 (3)	5.0	14	14	2.5	2.5	2.5
VFD68CJJ	3.7 (5)	8.0	14	14	2.5	2.5	2.5
VFD68CKL	5.5 (7.5)	12.0	12	14	4	2.5	4
VFD68CLL	7.5 (10)	16.0	12	12	4	4	4
VFD68CMP	11 (15)	23.0	10	10	6	6	10
VFD68CNP	15 (20)	29.5	8	8	10	10	10

¹ The recommended cable wire size is that of the cable (THHW cable) with a continuous maximum permissible temperature of 75°C. Assumes that the surrounding air temperature is 40°C or less. (Selection example for use mainly in the United States.)

² The recommended cable wire size is that of the cable (PVC cable) with a continuous maximum permissible temperature of 70°C. Assumes that the surrounding air temperature is 40°C or less. (Selection example for use mainly in Europe.)

³ The recommended cable wire size is that of the cable (THHW cable) with a continuous maximum permissible temperature of 75°C. Assumes that the surrounding air temperature is 40°C or less. (Selection example for use mainly in the United States.)

⁴ The recommended cable wire size is that of the cable (PVC cable) with a continuous maximum permissible temperature of 70°C. Assumes that the surrounding air temperature is 40°C or less. (Selection example for use mainly in Europe.)