VLT
®
8000 AQUA
■
Harmonic filter
Harmonic currents do not directly affect the electricity
consumption but has an impact on following conditions:
Higher total current to be handled by the installations
-
Increases load on transformer (sometimes it will
require a larger transformer, particular at retrofit)
-
Increases heat losses in transformer and installation
-
In some cases demands larger cables,
switches and fuses
Higher voltage distortion due to higher current
-
Increase risk for disturbing electronic equipment
connected to same grid
A high percentage of rectifier load from e.g. AFDs,
will increase the harmonic current, which must
be reduced to avoid the above consequences.
Therefore the AFD has as standard, built in DC coils
reducing the total current with about 40% (compared
to devices without any arrangement for harmonic
suppression), down to 40-45% ThiD.
In some cases there is a need for further suppression
(e.g. retrofit with AFDs). For this purpose Danfoss
can offer two advanced harmonic filters AHF05
and AHF10, bringing the harmonic current down
to around 5% and 10% respectively. For further
details see instruction MG.80.BX.YY.
MCT 31
The MCT 31 harmonic calculation PC tool enables
easy estimation of the harmonic distortion in a
given application. Both the harmonic distortion of
Danfoss frequency converters as well as non-Danfoss
frequency converters with different additional harmonic
reduction measurements, such as Danfoss AHF filters
and 12-18-pulse rectifiers, can be calculated.
Ordering number:
Please order your CD containing the MCT 31 PC
tool using code number 130B1031.
■
Ordering numbers, Harmonic filters
Harmonic filters are used to reduce line harmonics
•
AHF 010: 10% current distortion
•
AHF 005: 5% current distortion
380-415V, 50Hz
Danfoss ordering number
I
AHF,N
Typical Motor Used
[kW]
AHF 005
AHF 010
VLT 8000
10 A
4, 5.5
175G6600
175G6622
8006, 8008
19 A
7.5
175G6601
175G6623
8011, 8016
26 A
11
175G6602
175G6624
8022
35 A
15, 18.5
175G6603
175G6625
8027
43 A
22
175G6604
175G6626
8032
72 A
30, 37
175G6605
175G6627
8042, 8052
101 A
45.
55
175G6606
175G6628
8062, 8072
144 A
75
175G6607
175G6629
8102
180 A
90
175G6608
175G6630
8122
217 A
110
175G6609
175G6631
8152
289 A
132, 160
175G6610
175G6632
8202, 8252
324 A
175G6611
175G6633
Higher ratings can be achieved by paralleling the filter units
360 A
200
Two 180 A units
8302
434 A
250
Two 217 A units
8352
578 A
315
Two 289 A units
8450
613 A
355
289 A and 324 A units
8600
MG.80.A7.22 - VLT is a registered Danfoss trademark
22
Rosewood STP ST42 General (Operation and Maintenance Manual - Part 4:
Section 6.3 Manufacturers Manuals 6.3.33 Danfoss VLT Aquadrive 8000) Vendor Manual
QP Id: VM207
Active: 03/09/2013
Page 28 of 208