2 Product Overview
2.1 Introduction
This chapter provides an overview of the frequency
converter’s primary assemblies and circuitry. It describes
the internal electrical and signal processing functions. A
description of the internal control structure is also
included.
Also described are automated and optional frequency
converter functions available for designing robust
operating systems with sophisticated control and status
reporting performance.
2.1.1 Product Dedication to Refrigeration
Applications
The VLT
®
Refrigeration Drive FC 103 is designed for refrig-
eration applications. The integrated application wizard
guides the user through the commissioning process. The
range of standard and optional features includes:
•
Multi-zone cascade control
•
Neutral zone control.
•
Floating condensing temperature control.
•
Oil return management.
•
Multi-feedback evaporator control.
•
Cascade control.
•
Dry-run detection.
•
End of curve detection.
•
Motor alternation.
•
STO.
•
Sleep mode.
•
Password protection.
•
Overload protection.
•
Smart logic control.
•
Minimum speed monitor.
•
Free programmable texts for information,
warnings, and alerts.
2.1.2 Energy Savings
When comparing with alternative control systems and
technologies, a frequency converter is the optimum energy
control system for controlling fan and pump systems.
By using a frequency converter to control the flow, a pump
speed reduction of 20% leads to energy savings of about
50% in typical applications.
shows an example of the achievable energy
reduction.
130BD889.10
60
50
40
30
20
10
H
s
0
100
200
300
400
(mwg)
1350rpm
1650rpm
0
10
20
30
(kW)
40
50
60
200
100
300
(
m
3
/h
)
(
m
3
/h
)
400
1350rpm
1650rpm
P
shaft
1
1
Energy saving
Illustration 2.1 Example: Energy Saving
Product Overview
VLT
®
Refrigeration Drive FC 103
14
Danfoss A/S © 08/2015 All rights reserved.
MG16G202
2
2
