Danfoss VLT series Design Guide

Contents
1. How to Read this Design Guide
5
Copyright, Limitation of Liability and Revision Rights 5
Approvals 6
Symbols 6
Abbreviations 7
Definitions 7
2. Introduction to the VLT HVAC Drive 13
Disposal Instructions 14
CE labeling 16
Air humidity 18
Aggressive Environments 18
Vibration and shock 19
VLT HVAC Controls 33
PID 35
General aspects of EMC 47
Galvanic isolation (PELV) 50
Ground leakage current 51
Control with brake function 51
Mechanical brake control 53
Extreme running conditions 53
3. VLT HVAC Selection 55
Specifications 55
Efficiency 66
Special Conditions 68
Purpose of derating 68
Automatic adaptations to ensure performance 71
Options and Accessories 74
Analog I/O option MCB 109 80
4. How to Order 85
Ordering form 85
Type Code String 86
Ordering Numbers 87
5. How to Install 93
VLT
®
HVAC Drive Design Guide Contents
MG.11.B4.22 - VLT
®
is a registered Danfoss trademark. 1

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)