Product Overview; Introduction - Danfoss VLT AQUA Drive FC 202 Design Manual

Product Overview

2 Product Overview

2.1 Introduction

This chapter provides an overview of the adjustable
frequency drive'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 adjustable
frequency drive functions available for designing robust
operating systems with sophisticated control and status
reporting performance.
2.1.1 Product Dedication to Water and
Wastewater Applications
®
The VLT AQUA Drive FC 202 is designed for water and
wastewater applications. The integrated SmartStart wizard
and the quick menu Water and Pumps guide the user
through the commissioning process. The range of standard
and optional features includes:
•
Cascade control
•
Dry-run detection
•
End of curve detection
•
Motor alternation
•
Deragging
•
Initial and final ramp
•
Check valve ramp
•
STO
•
Low-flow detection
•
Pre-lube
•
Flow confirmation
•
Pipe fill mode
•
Sleep mode
•
Real time clock
•
Password protection
•
Overload protection
•
Smart logic control
•
Minimum speed monitor
•
Free programmable texts for information,
warnings and alerts
MG20N622
Design Guide
2.1.2 Energy Savings
Compared to alternative control systems and technologies,
an adjustable frequency drive is the optimum energy
control system for controlling fan and pump systems.
By using an adjustable frequency drive to control the flow,
a pump speed reduction of 20% leads to energy savings of
about 50% in typical applications.
Figure 2.1 shows an example of the achievable energy
reduction.
(mwg)
60
50
40
30
20
10
0
(kW)
60
50
40
30
20
10
0
1 Energy saving
Figure 2.1 Example: Energy Saving
Danfoss A/S © 09/2014 All rights reserved.
H
s
100 200
P
shaft
1350rpm
100 200
2
1650rpm
1350rpm
( 3 )
300 400 m /h
1650rpm
1
( )
300 400 m 3 /h
15
2