Selecting A Motor; Selecting A Vfd68 Drive For Controlling Multiple Motors; Selecting A Vfd68 Drive For Use With Single-Phase Supplied Power - Johnson Controls Penn VFD68D Series Technical Bulletin

Selecting a Motor

IMPORTANT:
VFD68 drive.
Motors used with the VFD68 drive must:
• be AC induction three-phase motors that are UL Recognized and CSA Certified, or equivalent
• be rated for: 230 VAC at 50/60 Hz; 460 VAC at 50/60 Hz; or 575 VAC at 60 Hz
• have an Inverter Rating (460 VAC motors)
• have Insulation Class F or better
The VFD68 drive is intended for use with variable speed motors that are rated for 40:1 operation.

Selecting a VFD68 Drive for Controlling Multiple Motors

IMPORTANT: Do not control both single-phase and three-phase motors with the same VFD68 drive.
A VFD68 drive can control multiple motors; however, the sum of the Full Load Amperes (FLA) ratings for the
motors must not exceed the maximum output amperage rating of the VFD68 drive, including any de-rating due
to altitude. See Table 3 on page 9 for de-rating information.

Selecting a VFD68 Drive for Use with Single-Phase Supplied Power

When using a single-phase power supply, the VFD68 drive requires more single-phase power to create
three-phase power for the motor. Therefore, you must select a VFD68 drive with a higher maximum output
current rating as follows:
• R = Current (Ampere) rating of the controlled single-phase motor (or sum of ratings, if using multiple
motors)
• 2*R = minimum required output current for VFD68 drive
Select a VFD68 drive such that Maximum Output Current (Ampere) > 2*R (see Table 2).
Table 2: Maximum Current Output by VFD68 Drive Model
VFD68Bxx
Models
VFD68BBB
VFD68BCB
VFD68BDC
VFD68BFD
VFD68BGG
VFD68BHG
VFD68BJK
VFD68BKL
VFD68BLL
VFD68BMP
VFD68BNP
When selecting the motor, do not exceed the maximum ampere rating of the
Maximum VFD68Cxx
Output Models
Current
(Amperes)
0.8 VFD68CDF
1.4 VFD68CFF
2.5 VFD68CGG
4.2 VFD68CHH
7.0 VFD68CJJ
10.0 VFD68CKL
16.5 VFD68CLL
23.8 VFD68CMP
31.8 VFD68CNP
45.0
58.0
VFD68 Variable Frequency Drives
Maximum VFD68Dxx
Output Models
Current
(Amperes)
1.2 VFD68DFM
2.2 VFD68DGM
3.6 VFD68DHM
5.0 VFD68DJN
8.0 VFD68DKN
12.0 VFD68DLN
16.0
23.0
29.5
7
Maximum
Output
Current
(Amperes)
1.7
2.7
4.0
6.1
9.0
12.0