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VLT
®
8000 AQUA
Introduction
■
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 eg frequency
converters, will increase the harmonic current, which
must be reduced to avoid the above consequences.
Therefore the frequency converter 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
(eg retrofit with frequency converters). 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 mains harmonics
•
AHF 010: 10% current distortion
•
AHF 005: 5% current distortion
380-415 V, 50 Hz
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
370 A
200
175G6688
175G6691
8302
Higher ratings can be achieved by paralleling the filter units
434 A
250
Two 217 A units
8352
578 A
315
Two 289 A units
8452
613 A
355
289 A and 324 A units
8502
648 A
400
Two 324 A units
8602
740 A
450
Two 370 A units
8652
MG.83.A2.02 - VLT is a registered Danfoss trademark
23
Содержание VLT 8000 AQUA series
Страница 29: ...VLT 8000 AQUA Introduction TYPE CODE Table Ordering form MG 83 A2 02 VLT is a registered Danfoss trademark 29 ...
Страница 52: ...VLT 8000 AQUA Mechanical dimensions MG 83 A2 02 VLT is a registered Danfoss trademark 52 ...
Страница 60: ...VLT 8000 AQUA All enclosure types VLT 8152 8652 380 480 V MG 83 A2 02 VLT is a registered Danfoss trademark 60 ...
Страница 63: ...VLT 8000 AQUA Installation MG 83 A2 02 VLT is a registered Danfoss trademark 63 ...