Motor Options - Danfoss VLT Option Panel Instruction Manual

Motor Options

The drive with bypass has three motor combination
options available for drive control or for running in
bypass: single motor, dual motor, or contact motor
select.
Single Motor Option
General Information
The single motor option is when a drive is
running one motor or the motor is operating in
bypass mode. The drive and motor are
normally the same hp. The FLA of the motor
must be less than or equal to the maximum
output current of the drive.
Prior to Enabling Single Motor Operation
• Complete the start-up procedure to
verify motor rotation direction is cor-
rect and that the system is ready in all
respects for continuous full speed
operation in bypass.
Function
There are no special functions related to
single motor option.
Dual Motor Option
General Information
The dual motor option is available for one
drive running two motors at the same time or
both motors running in bypass. The motors
may be of the same or different hp, but com-
bined FLA of the motors must be equal to or
less than the maximum output current of the
drive. (Note that the combined hp of the two
motors is not appropriate for sizing the drive;
use FLA.) Both motors respond to drive
commands or run at full output speed in
bypass. Separate overloads are required
since the drive does not monitor individual
motor current but the total current draw.
50
Prior to Enabling Dual Motor Operation
• Complete the start-up procedure to
verify each motor rotation direction is
correct and that the system is ready in
all respects for continuous full speed
operation in bypass.
• When using dual motors, see the drive
support materials for any special
requirements for running dual motors.
Function
For dual motor operation, a separate over-
load relay is connected to each motor over-
load. If either overload trips, both motors
stop.
Contactor Motor Select Option
General Information
The contactor motor select option is available
for one drive alternating operation between
two motors.
See Contactor Motor Select in this manual
for details on this option.