Table of Contents
Advertisement
2 Introduction to VLT Automation VT Drive
2
m
3
/h
Distribution
Valve regulation
%
Hours
Power
A
- B
1
1
350
5
438
42,5
300
15
1314
38,5
250
20
1752
35,0
200
20
1752
31,5
150
20
1752
28,0
100
20
1752
23,0
Σ
100
8760
2.7.5 Better Control
If a frequency converter is used for controlling the flow or pressure of a system, improved control is obtained.
A frequency converter can vary the speed of the fan or pump, thereby obtaining variable control of flow and pressure.
Furthermore, a frequency converter can quickly adapt the speed of the fan or pump to new flow or pressure conditions in the system.
Simple control of process (Flow, Level or Pressure) utilizing the built in PID control.
2.7.6 Cos φ Compensation
Generally speaking, a frequency converter with a cos φ of 1 provides power factor correction for the cos φ of the motor, which means that there is no
need to make allowance for the cos φ of the motor when sizing the power factor correction unit.
22
MG.20.X1.22 - VLT
Remote Site Products - 1-888-532-2706 - www.remotesiteproducts.com
http://www.remotesiteproducts.com/p-20783-Danfoss-131X8145-VLT-Automation-VT-Drive-VFD-FC322-460V-.5-HP.aspx
Automation VT Drive FC322 Design Guide
Frequency converter control
Consumption
Power
Consumption
kWh
A
- C
kWh
1
1
18.615
42,5
18.615
50.589
29,0
38.106
61.320
18,5
32.412
55.188
11,5
20.148
49.056
6,5
11.388
40.296
3,5
6.132
275.064
26.801
®
is a registered Danfoss trademark
Advertisement
Table of Contents
