Danfoss VLT series Quick Guide

Derating for high altitude, see 1.9 Special Conditions
Safety standards EN/IEC 61800-5-1, UL 508C
EMC standards, Emission EN 61800-3, EN 61000-6-3/4, EN 55011, IEC 61800-3
EMC standards, Immunity
EN 61800-3, EN 61000-3-12, EN 61000-6-1/2, EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN
61000-4-5, EN 61000-4-6
1.9 Special Conditions
1.9.1 Derating for Ambient Temperature
and Switching Frequency
The ambient temperature measured over 24 hours should
be at least 5 °C lower than the max. ambient temperature.
If the frequency converter is operated at high ambient
temperature, the continuous output current should be
decreased. For derating curve, see VLT
®
HVAC Basic Design
Guide.
1.9.2
Derating for Low Air Pressure
The cooling capability of air is decreased at low air
pressure. For altitudes above 2000 m, contact Danfoss
regarding PELV. Below 1000 m altitude no de-rating is
necessary, but above 1000 m the ambient temperature or
the maximum output current should be decreased.
Decrease the output by 1% per 100 m altitude above 1000
m or reduce the max. ambient temperature by 1° per 200
m.
Quick Guide
VLT
®
HVAC Basic Drive Cascade Controller Quick Guide
34 MG18F402 - VLT
®
is a registered Danfoss trademark
11

Danfoss VLT series Specifications

General

Series	VLT
Category	DC Drives
Output Voltage	0-100% of input voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Overtemperature, Short Circuit, Ground Fault
Communication Interfaces	Profibus, CANopen
Enclosure Rating	IP20, IP21, IP55, IP66
Cooling Method	Forced Air Cooling, Convection Cooling
Control Mode	Sensorless Vector, Closed Loop Vector
Ambient Temperature	-10°C to +50°C (14°F to 122°F)