Danfoss VLT Design Guide

motors. Provide further motor protection by e.g.
thermistors in each motor or individual thermal relays.
(Circuit breakers are not suitable as protection).
Illustration 5.27
5.4.5 Direction of Motor Rotation
The default setting is clockwise rotation with the frequency
converter output connected as follows.
Terminal 96 connected to U-phase
Terminal 97 connected to V-phase
Terminal 98 connected to W-phase
The direction of motor rotation is changed by switching
two motor phases.
Motor rotation check can be performed using 1-28 Motor
Rotation Check and following the steps shown in the
display.
Illustration 5.28
5.4.6 Motor Thermal Protection
The electronic thermal relay in the frequency converter has
received the UL-approval for single motor protection,
when 1-90 Motor Thermal Protection is set for ETR Trip and
1-24 Motor Current is set to the rated motor current (see
motor name plate).
How to Install
VLT
®
Refrigeration Drive Design Guide
74 MG16G102 - VLT
®
is a registered Danfoss trademark
5
5

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)