Danfoss VLT Pocket Guide

VLT
®
Soft Starter Pocket Guide 29
A single soft starter can be used to control multiple motors, either in
sequence or in parallel, provided the soft starter is correctly selected
for the application.
Motors in sequence
For two or more motors in sequence, the soft starter must be capable
of bearing the total start duty.
Installation requires additional wiring, plus separate overload protec-
tion and line and bypass contactors for each motor. The additional
installation costs may be greater than the cost of individual soft
starters.
* This control method is complex and would require the use
of a PLC or smart relay.
Multiple motors: Can one soft starter be used
to control multiple motors?

Danfoss VLT Specifications

General

Frequency	50/60 Hz
Enclosure	IP20, IP21, IP55, IP66
Series	VLT
Control Technique	Flux Vector Control
Output Voltage	0-Vinput
Control Method	Fieldbus
Communication Interface	PROFIBUS, CANopen
Protection Features	Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Cooling Method	Liquid Cooled
Storage Temperature	-25°C to +70°C
Relative Humidity	5-95% non-condensing
Altitude	Up to 1000m (3280ft) without derating, up to 4000m (13120ft) with derating
Operating Temperature	-10°C to +50°C (14°F to 122°F)