Danfoss VLT AQUA Drive FC 202 Design Manual page 100

Electrical Installation Con...
Harmonic order (h)
Table 10.30 Compatibility Levels for Harmonics
THDv
Table 10.31 Compatibility Levels for the Total Harmonic Voltage Distortion THDv
10.16.4 Harmonic Compliance
Danfoss drives comply with the following standards:
•
IEC61000-2-4
•
IEC61000-3-4
•
G5/4
10.16.5 Harmonic Mitigation
In cases where extra harmonic suppression is required, Danfoss offers the following mitigation equipment:
10 10
•
VLT
•
VLT
•
VLT
•
VLT
Selecting the right solution depends on several factors:
•
The grid (background distortion, mains unbalance, resonance, and type of supply (transformer/generator).
•
Application (load profile, number of loads, and load size).
•
Local/national requirements/regulations (such as IEEE 519, IEC, and G5/4).
•
Total cost of ownership (initial cost, efficiency, and maintenance).
10.16.6 Harmonic Calculation
Use the free Danfoss MCT 31 calculation software to determine the degree of voltage pollution on the grid and needed
precaution. The VLT
98
5
7
11
13
17
17˂h≤49 2.27 x (17/h) – 0.27
Class 1
®
12-pulse drives
®
AHF filters
®
Low Harmonic Drives
®
Active Filters
®
Harmonic Calculation MCT 31 is available at www.danfoss.com.
Danfoss A/S © 05/2017 All rights reserved.
VLT® AQUA Drive FC 202
Class 1 (V %)
h
3
3
3
3
2
5%
Class 2 (V %)
h
6
5
3.5
3
2
2.27 x (17/h) – 0.27
Class 2
8%
Class 3 (V %)
h
8
7
5
4.5
4
4.5 x (17/h) – 0.5
Class 3
10%
MG22B102