System Integration; Ambient Operating Conditions; Humidity; Temperature - Danfoss VLT AQUA Drive FC 202 Design Manual

System Integration

3 System Integration
3 3
This chapter describes the considerations necessary to
integrate the adjustable frequency drive into a system
design. The chapter is divided into these sections:
•
Chapter 3.1 Ambient Operating Conditions
Ambient operating conditions for the adjustable
frequency drive including environment,
enclosures, temperature, derating, and other
considerations.
•
Chapter 3.3 Line Power Integration
Input into the adjustable frequency drive from
the line power side including power, harmonics,
monitoring, cabling, fusing, and other consider-
ations.
•
Chapter 3.2 EMC, Harmonics and Ground Leakage
Protection
Input (regeneration) from the adjustable
frequency drive to the power grid including
power, harmonics, monitoring, and other consid-
erations.
•
Chapter 3.4 Motor Integration
Output from the adjustable frequency drive to
the motor including motor types, load,
monitoring, cabling, and other considerations.
•
Chapter 3.5 Additional Inputs and Outputs,
Chapter 3.6 Mechanical Planning
Integration of the adjustable frequency drive
input and output for optimal system design
including adjustable frequency drive/motor
matching, system characteristics, and other
considerations.
A comprehensive system design anticipates potential
problem areas while implementing the most effective
combination of drive features. The information that follows
provides guidelines for planning and specifying a motor-
control system incorporating adjustable frequency drives.
Operational features provide a range of design concepts,
from simple motor speed control to a fully integrated
automation system with feedback handling, operational
status reporting, automated fault responses, remote
programming, and more.
A complete design concept includes detailed specification
of needs and use.
•
Adjustable frequency drive types
•
Motors
38
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VLT AQUA Drive FC 202
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See chapter 3.9 System Design Checklist for a practical guide
for selection and design.
Understanding features and strategy options can optimize
a system design and possibly avoid introducing redundant
components or functionality.

3.1 Ambient Operating Conditions

3.1.1 Humidity

Although the adjustable frequency drive can operate
properly at high humidity (up to 95% relative humidity),
avoid condensation. There is a specific risk of condensation
when the adjustable frequency drive is colder than moist
ambient air. Moisture in the air can also condense on the
electronic components and cause short circuits. Conden-
sation occurs in units without power. It is advisable to
install a cabinet heater when condensation is possible due
to ambient conditions. Avoid installation in areas subject to
frost.
Alternatively, operating the adjustable frequency drive in
stand-by mode (with the unit connected to line power)
reduces the risk of condensation. Ensure the power
dissipation is sufficient to keep the adjustable frequency
drive circuitry free of moisture.

3.1.2 Temperature

Minimum and maximum ambient temperature limits are
specified for all adjustable frequency drives. Avoiding
extreme ambient temperatures prolongs the life of the
equipment and maximizes overall system reliability. Follow
the recommendations listed for maximum performance
and equipment longevity.
Danfoss A/S © 09/2014 All rights reserved.
Line power requirements
Control structure and programming
Serial communication
Equipment size, shape, weight
Power and control cabling requirements; type and
length
Fuses
Auxiliary equipment
Transportation and storage
MG20N622